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Gebresillasie TG, Worku A, Ahmed AA, Kabeta ND. Determinants of asthma among adults in Tigray, Northern Ethiopia: a facility-based case-control study. PeerJ 2024; 12:e16530. [PMID: 38192600 PMCID: PMC10773448 DOI: 10.7717/peerj.16530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Accepted: 11/06/2023] [Indexed: 01/10/2024] Open
Abstract
Background Asthma is a public health concern affecting millions of productive age groups. Several studies were conducted on the determinants of asthma in children. However, little is known about the determinants of asthma among adults in Ethiopia. Understanding the determinants of asthma among adults can help reduce its burden. This study was aimed at identifying determinant factors for developing asthma among adults in Tigray hospitals. Methods A facility-based, unmatched case-control study design was conducted from January 1 to April 26, 2019. A total of 698 participants (228 cases and 470 controls) completed their guided interviews using structured and pretested questionnaires by trained data collectors. A modified standard questionnaire from the European Community Respiratory Health Survey II (ECRHS II) was used to collect the data. The case definition was patients having asthma, and the control definition was patients without asthma. Data were entered and cleaned using Epi Data Manager Version 3.1 software and imported to statistical packages for social sciences Version 25 software for analysis. To identify asthma determinants, bivariate and multivariable logistic regression models were fitted. Results The response rate for both cases and controls was 95.9%. The odds of developing asthma was nearly twice higher among those who resided in urban (AOR = 1.68; 95% CI [1.13-2.50]), more than twice higher among those who have income less than 1000 ETB (AOR = 2.3; 95% CI [1.17-4.56]), twice higher among those who had history of skin allergy (AOR = 2.09; 95% CI [1.14-3.86]), over four times higher among those with family history of asthma (AOR = 4.26; 95% CI [2.63-6.91]), three times higher among those having house dust or smoke exposure (AOR = 3.01; 95% CI [1.96-4.64]), over five times higher among those lifetime firewood users (AOR = 5.39; 95% CI [3.34-8.72]), door opening while cooking (AOR = 0.35; 95% CI [0.26-0.55]), nearly two times higher among those having house dampness (AOR = 1.98; 95% CI [1.069-3.68]), over seven times higher among pet owners (AOR = 7.46; 95% CI [4.04-13] and almost twice higher among those who were physically inactive (AOR = 1.75; 95% CI [1.11-2.85]). Conclusion Asthma has been associated with urbanization, low income, a history of allergic diseases, indoor smoke or dust, firewood use, pet ownership, and a sedentary lifestyle. The community should be informed about the known risks and implement preventive steps like opening a door while cooking to lower the risk of asthma.
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Affiliation(s)
- Tirhas G. Gebresillasie
- Department of Public Health, College of Health Sciences, Aksum University, Axum, Tigray, Ethiopa
- School of Public Health, College of Medicine and Health Science, Addis Ababa University, Addis Ababa, Ethiopia
| | - Alemayehu Worku
- School of Public Health, College of Medicine and Health Science, Addis Ababa University, Addis Ababa, Ethiopia
| | - Ahmed Ali Ahmed
- School of Public Health, College of Medicine and Health Science, Addis Ababa University, Addis Ababa, Ethiopia
| | - Negussie Deyessa Kabeta
- School of Public Health, College of Medicine and Health Science, Addis Ababa University, Addis Ababa, Ethiopia
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Xing Z, Yang T, Shi S, Meng X, Chen R, Long H, Hu Y, Chai D, Liu W, Tong Y, Wang Y, Ma Y, Pan M, Cui J, Sun T, Guo Y. Ambient particulate matter associates with asthma in high altitude region: A population-based study. World Allergy Organ J 2023; 16:100774. [PMID: 37214170 PMCID: PMC10193005 DOI: 10.1016/j.waojou.2023.100774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 03/14/2023] [Accepted: 04/06/2023] [Indexed: 05/24/2023] Open
Abstract
Background Exposure to particulate matter (PM) has been a major public health threat, but the potentially differential effects on asthma of PM remain largely unknown in high altitude settings. We evaluated the effects of ambient PM on asthma in high altitude settings. Methods The study recruited a representative sample from high altitude settings using a multistage stratified sampling procedure. Asthma was defined by a self-reported history of diagnosis by a physician or by wheezing symptoms in the preceding 12 months. The annual mean PM2.5 and PM10 concentrations were calculated for each grid cell at 1-km spatial resolution based on the geographical coordinates. Results We analyzed data for participants (mean age 39.1 years, 51.4% female) and 183 (3.7%, 95% confidence interval (CI): 3.2-4.2) of the participants had asthma. Prevalence was higher in women (4.3%, 95% CI 3.5-5.1) than in men (3.1%, 2.4-3.8) and increasing with higher concentration of PM exposures. For an interquartile range (IQR) difference (8.77 μg/m3) in PM2.5 exposure, the adjusted odds ratio (OR) was 1.64 (95% CI 1.46-1.83, P < 0.001) for risk of asthma. For PM10, there was evidence for an association with risk of asthma (OR 2.34, 95% CI: 1.75-3.15, P < 0.001 per IQR of 43.26 μg/m3). Further analyses showed that household mold or damp exposure may aggravate PM exposure associated risks of asthma. Conclusions This study identified that PM exposure could be a dominate environmental risk factor for asthma but largely unconsidered in the high-altitude areas. The association between PM exposure and asthma should be of interest for planners of national policies and encourage programs for prevention of asthma in residents living at high altitudes.
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Affiliation(s)
- ZhenZhen Xing
- Peking University Fifth School of Clinical Medicine, Beijing, China
- Department of Respiratory and Critical Care Medicine, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing, China
| | - Ting Yang
- Department of Pulmonary and Critical Care Medicine, Center of Respiratory Medicine, China-Japan Friendship Hospital, China
- National Center for Respiratory Medicine & National Clinical Research Center for Respiratory Diseases, China
- Institute of Respiratory Medicine, Chinese Academy of Medical Sciences, China
- Department of Respiratory Medicine, Capital Medical University, Beijing, China
| | - Su Shi
- School of Public Health, Key Lab of Public Health Safety of the Ministry of Education and NHC Key Lab of Health Technology Assessment, Fudan University, Shanghai, China
| | - Xia Meng
- School of Public Health, Key Lab of Public Health Safety of the Ministry of Education and NHC Key Lab of Health Technology Assessment, Fudan University, Shanghai, China
| | - Renjie Chen
- School of Public Health, Key Lab of Public Health Safety of the Ministry of Education and NHC Key Lab of Health Technology Assessment, Fudan University, Shanghai, China
| | - Huanyu Long
- Peking University Fifth School of Clinical Medicine, Beijing, China
- Department of Respiratory and Critical Care Medicine, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing, China
| | - Yanlu Hu
- Peking University Fifth School of Clinical Medicine, Beijing, China
- Department of Respiratory and Critical Care Medicine, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing, China
| | - Di Chai
- Peking University Fifth School of Clinical Medicine, Beijing, China
- Department of Respiratory and Critical Care Medicine, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing, China
| | - WeiMing Liu
- Department of Intensive Care Medicine, Beijing Boai Hospital, Rehabilitation Research Center, Beijing, China
| | - YaQi Tong
- Peking University Fifth School of Clinical Medicine, Beijing, China
- Department of Respiratory and Critical Care Medicine, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing, China
| | - YuXia Wang
- Peking University Fifth School of Clinical Medicine, Beijing, China
- Department of Respiratory and Critical Care Medicine, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing, China
| | - YaLi Ma
- Peking University Fifth School of Clinical Medicine, Beijing, China
- Department of Respiratory and Critical Care Medicine, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing, China
| | - MingMing Pan
- Peking University Fifth School of Clinical Medicine, Beijing, China
- Department of Respiratory and Critical Care Medicine, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing, China
| | - Jia Cui
- Peking University Fifth School of Clinical Medicine, Beijing, China
- Department of Respiratory and Critical Care Medicine, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing, China
| | - TieYing Sun
- Peking University Fifth School of Clinical Medicine, Beijing, China
- Department of Respiratory and Critical Care Medicine, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing, China
| | - YanFei Guo
- Peking University Fifth School of Clinical Medicine, Beijing, China
- Department of Respiratory and Critical Care Medicine, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing, China
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Puci MV, Ferraro OE, Monti MC, Gnesi M, Borrelli P, Cadum E, Perotti P, Migliazza S, Dalle Carbonare S, Montomoli C, Villani S. Asthma, COPD, Respiratory, and Allergic Health Effects in an Adult Population Living near an Italian Refinery: A Cross-Sectional Study. Healthcare (Basel) 2023; 11:healthcare11071037. [PMID: 37046964 PMCID: PMC10093894 DOI: 10.3390/healthcare11071037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 03/31/2023] [Accepted: 04/02/2023] [Indexed: 04/14/2023] Open
Abstract
BACKGROUND AND AIM Asthma and chronic obstructive pulmonary disease (COPD) are leading causes of morbidity and mortality worldwide. Globally, 545 million people suffer from chronic respiratory diseases with a wide geographical variability. Risk factors for asthma are both genetic and related to several environmental factors (internal and external pollutants); these also have an important role in the occurrence of COPD. The aim of this study was to describe the prevalence of asthma, COPD, and asthma/COPD overlap (ACO) in an adult population living in two municipalities located in the Po Valley. METHODS A standardized questionnaire on respiratory symptoms and sociodemographic characteristics was self-administered to a random sample of the adult population aged 20-64 years, living near a refinery in Northern Italy during the period between 2016 and 2019. Logistic and multinomial regression were implemented to explore factors associated with asthma, COPD, and ACO. RESULTS In total, 1108 subjects filled out the questionnaire, the mean age was 48.02 ± 12.34 years (range 21-68), and 53% of the respondents/participants were female. Half of the responders were non-smokers, but the frequency of current and former smokers was significantly greater in men than in women (p < 0.001). The likelihood of being a probable case of asthma decreased with increasing age and increased for smokers. Tobacco smoke was associated with the presence of COPD and ACO. CONCLUSION Respiratory diseases such as asthma and COPD are common in the general population, with differences among countries worldwide. Our findings show, on the basis of the main confirmed risk factor, namely smoking, that it is useful to plan target programs and actions in order to reduce smoking, thus improving the quality of life in public health.
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Affiliation(s)
- Mariangela Valentina Puci
- Unit of Biostatistics and Clinical Epidemiology, Department of Public Health, Experimental and Forensic Medicine, University of Pavia, 27100 Pavia, Italy
| | - Ottavia Eleonora Ferraro
- Unit of Biostatistics and Clinical Epidemiology, Department of Public Health, Experimental and Forensic Medicine, University of Pavia, 27100 Pavia, Italy
| | - Maria Cristina Monti
- Unit of Biostatistics and Clinical Epidemiology, Department of Public Health, Experimental and Forensic Medicine, University of Pavia, 27100 Pavia, Italy
| | - Marco Gnesi
- Unit of Biostatistics and Clinical Epidemiology, Department of Public Health, Experimental and Forensic Medicine, University of Pavia, 27100 Pavia, Italy
| | - Paola Borrelli
- Unit of Biostatistics and Clinical Epidemiology, Department of Public Health, Experimental and Forensic Medicine, University of Pavia, 27100 Pavia, Italy
- Laboratory of Biostatistics, Department of Medical, Oral and Biotechnological Sciences, University "G. d'Annunzio" Chieti-Pescara, 66100 Chieti, Italy
| | - Ennio Cadum
- Health Protection Agency of Pavia (ATS Pavia), 27100 Pavia, Italy
| | - Pietro Perotti
- Health Protection Agency of Pavia (ATS Pavia), 27100 Pavia, Italy
| | - Simona Migliazza
- Health Protection Agency of Pavia (ATS Pavia), 27100 Pavia, Italy
| | | | - Cristina Montomoli
- Unit of Biostatistics and Clinical Epidemiology, Department of Public Health, Experimental and Forensic Medicine, University of Pavia, 27100 Pavia, Italy
| | - Simona Villani
- Unit of Biostatistics and Clinical Epidemiology, Department of Public Health, Experimental and Forensic Medicine, University of Pavia, 27100 Pavia, Italy
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Zhao M, Huang CC, Mendoza M, Tovar X, Lecca L, Murray M. Subjective socioeconomic status: an alternative to objective socioeconomic status. BMC Med Res Methodol 2023; 23:73. [PMID: 36977997 PMCID: PMC10044732 DOI: 10.1186/s12874-023-01890-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Accepted: 03/15/2023] [Indexed: 03/30/2023] Open
Abstract
BACKGROUND Subjective "ladder" measurements of socio-economic status (SES) are easy-to-administer tools that ask respondents to rate their own SES, allowing them to evaluate their own material resources and determine where it places them relative to their community. Here, we sought to compare the MacArthur Scale of Subjective Social status to the WAMI, an objective measure of SES that includes data on water and sanitation, asset ownership, education, and income. METHODS Leveraging a study of 595 tuberculosis patients in Lima, Peru, we compared the MacArthur ladder score to the WAMI score using weighted Kappa scores and Spearman's rank correlation coefficient. We identified outliers that fell outside the 95th percentile and assessed the durability of the inconsistencies between scores by re-testing a subset of participants. We then used Akaike information criterion (AIC) to compare the predictability of logistic regression models evaluating the association between the two SES scoring systems and history of asthma. RESULTS The correlation coefficient between the MacArthur ladder and WAMI scores was 0.37 and the weighted Kappa was 0.26. The correlation coefficients differed by less than 0.04 and the Kappa ranged from 0.26 to 0.34, indicating fair agreement. When we replaced the initial MacArthur ladder scores with retest scores, the number of individuals with disagreements between the two scores decreased from 21 to 10 and the correlation coefficient and weighted Kappa both increased by at least 0.03. Lastly, we found that when we categorized WAMI and MacArthur ladder scores into three groups, both had a linear trend association with history of asthma with effect sizes and AICs that differed by less than 15% and 2 points, respectively. CONCLUSION Our findings demonstrated fair agreement between the MacArthur ladder and WAMI scores. The agreement between the two SES measurements increased when they were further categorized into 3-5 categories, the form in which SES is often used in epidemiologic studies. The MacArthur score also performed similarly to WAMI in predicting a socio-economically sensitive health outcome. Researchers should consider subjective SES tools as an alternative method for measuring SES, particularly in large health studies where data collection is a burden.
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Affiliation(s)
- Maryann Zhao
- Department of Global Health and Social Medicine, Harvard Medical School, 641 Huntington Ave, Boston, MA, 02115, USA
| | - Chuan-Chin Huang
- Department of Global Health and Social Medicine, Harvard Medical School, 641 Huntington Ave, Boston, MA, 02115, USA
- Division of Global Health Equity, Brigham and Women's Hospital, Boston, MA, 02115, USA
| | | | - Ximena Tovar
- Department of Global Health and Social Medicine, Harvard Medical School, 641 Huntington Ave, Boston, MA, 02115, USA
| | - Leonid Lecca
- Department of Global Health and Social Medicine, Harvard Medical School, 641 Huntington Ave, Boston, MA, 02115, USA
- Socios En Salud, Lima, 15001, Peru
| | - Megan Murray
- Department of Global Health and Social Medicine, Harvard Medical School, 641 Huntington Ave, Boston, MA, 02115, USA.
- Division of Global Health Equity, Brigham and Women's Hospital, Boston, MA, 02115, USA.
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Agnihotri NT, Nyenhuis SM. Global Considerations in Asthma Treatment: Management in Low Resource Settings. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2023; 1426:377-394. [PMID: 37464129 DOI: 10.1007/978-3-031-32259-4_16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/20/2023]
Abstract
Low-resource settings have a disproportionately higher burden of asthma due to factors that include environmental triggers, access to healthcare, availability of medications, and uncoordinated health systems. The application of guideline-based management can vary, which further impacts the treatment delivered. This chapter aims to outline the global landscape of asthma management, including cultural and social factors, with suggestions for interventions.
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Affiliation(s)
- Neha T Agnihotri
- University of Illinois at Chicago, Department of Medicine, Division of Pulmonary, Critical Care, Sleep and Allergy, Chicago, IL, USA
| | - Sharmilee M Nyenhuis
- University of Chicago, Pediatrics, Section of Allergy and Immunology, Chicago, IL, USA.
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Abebe Y, Ali A, Kumie A, Haile T, Tamire M, Addissie A. Determinants of asthma in Ethiopia: age and sex matched case control study with special reference to household fuel exposure and housing characteristics. Asthma Res Pract 2021; 7:14. [PMID: 34823608 PMCID: PMC8613982 DOI: 10.1186/s40733-021-00080-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Accepted: 11/14/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Asthma is a chronic inflammatory disorder characterized by airway obstruction and hyper-responsiveness. Studies suggest that household fuel exposure and housing characteristics are associated with air way related allergy. But there remains to be a considerable uncertainty about whether that reflects an association with asthma. This study endeavored to bridge the gap by identifying factors associated with asthma, with special reference to household fuel exposure and housing characteristics in selected public hospitals in Addis Ababa, Ethiopia. METHODS We conducted a hospital-based matched case-control study. A total of 483 study participants were selected from two Ethiopian referral hospitals using a sequential sampling technique, with 161 cases and 322 controls. Standard questionnaire from the European Community Respiratory Health Survey II (ECRHS II) and the American Thoracic Society Division of Lung Disease (ATS-DLD-78) were used to collect household related data. Conditional logistic regression model was applied to identify the determinants of asthma. Both crude and adjusted odds ratios with 95% confidence interval (CI) were used to identify predictors of asthma. RESULTS The response rate for both cases and controls was 99.17%. The odds of developing asthma was about four times higher among those who used agricultural residues for cooking (AOR: 3.81, 95% CI: 1.05, 13.79)., about five times higher among those who used wood for cooking (AOR: 4.95, 95% CI: 2.1, 11.69), nearly five times higher among those who had family history of asthma (AOR: 4.72, 95% CI: 1.54, 14.45), just over six times higher among those who smoke tobacco (AOR: 6.16, 95% CI: 1.31, 29.09) and over ten times higher among those who do not practice door opening, while cooking (AOR: 10.25, 95% CI: 3.97, 26.49). CONCLUSION Family history of asthma, tobacco smoking, use of solid fuels including, woods and agricultural residues were associated with development of asthma. To reduce the risk of asthma, people should practice door opening, while cooking, and must avoid using wood and agricultural residues for cooking and should also refrain from tobacco smoking.
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Affiliation(s)
- Yonas Abebe
- Department of Preventive Medicine, School of Public Health, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia.
| | - Ahmed Ali
- Department of Preventive Medicine, School of Public Health, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia
| | - Abera Kumie
- Department of Preventive Medicine, School of Public Health, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia
| | - Tewodros Haile
- Department of Internal Medicine, School of Medicine, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia
| | - Mulugeta Tamire
- Department of Preventive Medicine, School of Public Health, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia
| | - Adamu Addissie
- Department of Preventive Medicine, School of Public Health, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia
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Understanding socio-economic inequalities in the prevalence of asthma in India: an evidence from national sample survey 2017-18. BMC Pulm Med 2021; 21:372. [PMID: 34781912 PMCID: PMC8591869 DOI: 10.1186/s12890-021-01742-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Accepted: 11/09/2021] [Indexed: 11/10/2022] Open
Abstract
Background Today, over 300 million people reside with asthma worldwide and India alone is home for 6% of children and 2% of adults suffering from this chronic disease. A common notion of disparity persists in terms of health outcomes across the poor and better-off section of the society. Thus, there is a need to explore socio-economic inequality in the contribution of various factors associated with asthma prevalence in India. Methods Data for the study were carved out from the 75th round of National Sample Survey (NSS), collected by the National Sample Survey Organization (NSSO) during 2017–18. The sample size for this study was 555,289 individuals, for which data was used for the analysis. Descriptive statistics were used to show the distribution of the study population. Further, bivariate and multivariate analysis was performed to identify the factors associated with Asthma prevalence. The concentration index was used to measure the inequality. Further, we used decomposition analysis to find the contribution of factors responsible for socio-economic status-related inequality in asthma prevalence. Results The prevalence of asthma was 2 per 1000 in the whole population; however, the prevalence differs by age groups in a significant manner. Age, sex, educational status, place of residence, cooking fuel, source of drinking water, household size and garbage disposal facility were significantly associated with asthma prevalence in India. It was found that asthma was more concentrated among individuals from higher socioeconomic status (concentration index: 0.15; p < 0.05). While exploring socio-economic inequality for asthma, richest wealth status (53.9%) was the most significant contributor in explaining the majority of the inequality followed by the urban place of residence (37.9%) and individual from age group 45–65 years (33.3%). Additionally, individual aged 65 years and above (27.9%) and household size less than four members (14.7%) contributed in explaining socio-economic inequality for asthma. Conclusion Due to the heterogeneous nature of asthma, associations between different socio-economic indicators and asthma can be complex and may point in different directions. Hence, considering the concentration of asthma prevalence in vulnerable populations and its long-term effect on general health, a comprehensive programme to tackle chronic respiratory diseases and asthma, in particular, is urgently needed.
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Yan M, Gong J, Liu Q, Li W, Duan X, Cao S, Li S, He L, Yin Z, Lin W, Zhang JJ. The effects of indoor and outdoor air pollution on the prevalence of adults' respiratory diseases in four Chinese cities: a comparison between 2017-2018 and 1993-1996. J Thorac Dis 2021; 13:4560-4573. [PMID: 34422382 PMCID: PMC8339734 DOI: 10.21037/jtd-20-2121] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Accepted: 04/25/2021] [Indexed: 11/24/2022]
Abstract
Background Over the past decades, both ambient and household air pollution have changed in several aspects, including the emission sources and the concentrations of pollutants, in many Chinese cities. It is unknown whether these changes are associated with changes in health conditions, especially given changes in other factors due to rapid economic growth. Methods Two cross-sectional surveys were conducted in two periods spanning more than twenty years (1993–1996 vs. 2017–2018) in four Chinese cities of Chongqing, Wuhan, Lanzhou, and Guangzhou. Data were collected regarding adults’ respiratory disease, smoking status, education, occupation, and household characteristics. Ambient air pollution data were obtained for each study. We first used logistic regression models to construct the district-specific adjusted disease prevalences. In the second stage, first-difference regression models were employed to examine whether the change in respiratory diseases prevalences was associated with the change in outdoor air pollution and indoor air pollution surrogates. Results A total of 7,557 and 9,974 households were participating in Period 1 (1993–1996) and Period 2 (2017–2018), respectively. Compared to Period 1, we found substantial reductions in the ambient air pollution concentrations, and a suggestive improvement in cooking-related indoor air pollution in Period 2. We observed decreases in the district-specific covariate-adjusted prevalences of both asthma and chronic bronchitis among participants, with an average reduction of 3.6% (range: 0.0% to 24.3%). From Period 1 to Period 2, one percent decrease in the proportion of cooking with coal was associated with a 19.0% (95% CI, 0.96–37.04%) decrease in the prevalence of males’ chronic bronchitis and a 1.86% (0.69–3.04%) increase in the prevalence of females’ asthma. Little evidence was observed regarding the potential health benefits associated with the decreases in ambient air pollution levels. Conclusions The substantial reduction in household use of coal for cooking might be an important contributor to the decrease in adults’ respiratory disease prevalence from 1993–1996 to 2017–2019 in four Chinese cities. Changes in this indoor air pollution source, along with other risk factors for respiratory diseases, may have masked respiratory health benefits associated with reductions in outdoor air pollution levels.
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Affiliation(s)
- Meilin Yan
- Beijing Innovation Center for Engineering Science and Advanced Technology, State Key Joint Laboratory for Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, And Center for Environment and Health, Peking University, Beijing, China
| | - Jicheng Gong
- Beijing Innovation Center for Engineering Science and Advanced Technology, State Key Joint Laboratory for Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, And Center for Environment and Health, Peking University, Beijing, China
| | - Qin Liu
- School of Public Health and Management, Research Center for Medicine and Social Development, Collaborative Innovation Center of Social Risks Governance in Health, Chongqing Medical University, Chongqing, China
| | - Wenyan Li
- School of Public Health and Management, Research Center for Medicine and Social Development, Collaborative Innovation Center of Social Risks Governance in Health, Chongqing Medical University, Chongqing, China
| | - Xiaoli Duan
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, China
| | - Suzhen Cao
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, China
| | - Sai Li
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, China
| | - Lingyan He
- Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, China
| | - Zixuan Yin
- Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, China
| | - Weiwei Lin
- Department of Occupational and Environmental Health, School of Public Health, Sun Yat-Sen University, Guangzhou, China
| | - Junfeng Jim Zhang
- Global Health Research Center, Duke Kunshan University, Kunshan, China.,Nicholas School of the Environment and Duke Global Health Institute, Duke University, Durham, USA.,Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
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9
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Fiuza BSD, Fonseca HF, Meirelles PM, Marques CR, da Silva TM, Figueiredo CA. Understanding Asthma and Allergies by the Lens of Biodiversity and Epigenetic Changes. Front Immunol 2021; 12:623737. [PMID: 33732246 PMCID: PMC7957070 DOI: 10.3389/fimmu.2021.623737] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Accepted: 02/08/2021] [Indexed: 12/12/2022] Open
Abstract
Exposure to different organisms (bacteria, mold, virus, protozoan, helminths, among others) can induce epigenetic changes affecting the modulation of immune responses and consequently increasing the susceptibility to inflammatory diseases. Epigenomic regulatory features are highly affected during embryonic development and are responsible for the expression or repression of different genes associated with cell development and targeting/conducting immune responses. The well-known, "window of opportunity" that includes maternal and post-natal environmental exposures, which include maternal infections, microbiota, diet, drugs, and pollutant exposures are of fundamental importance to immune modulation and these events are almost always accompanied by epigenetic changes. Recently, it has been shown that these alterations could be involved in both risk and protection of allergic diseases through mechanisms, such as DNA methylation and histone modifications, which can enhance Th2 responses and maintain memory Th2 cells or decrease Treg cells differentiation. In addition, epigenetic changes may differ according to the microbial agent involved and may even influence different asthma or allergy phenotypes. In this review, we discuss how exposure to different organisms, including bacteria, viruses, and helminths can lead to epigenetic modulations and how this correlates with allergic diseases considering different genetic backgrounds of several ancestral populations.
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Affiliation(s)
| | | | - Pedro Milet Meirelles
- Instituto de Biologia, Universidade Federal da Bahia, Salvador, Brazil
- Instituto Nacional de Ciência e Tecnologia em Estudos Interdisciplinares e Transdisciplinares em Ecologia e Evolução (IN-TREE), Salvador, Brazil
| | - Cintia Rodrigues Marques
- Instituto Multidisciplinar em Saúde, Universidade Federal da Bahia, Vitória da Conquista, Brazil
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10
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Commodore S, Ferguson PL, Neelon B, Newman R, Grobman W, Tita A, Pearce J, Bloom MS, Svendsen E, Roberts J, Skupski D, Sciscione A, Palomares K, Miller R, Wapner R, Vena JE, Hunt KJ. Reported Neighborhood Traffic and the Odds of Asthma/Asthma-Like Symptoms: A Cross-Sectional Analysis of a Multi-Racial Cohort of Children. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 18:E243. [PMID: 33396261 PMCID: PMC7794885 DOI: 10.3390/ijerph18010243] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 12/11/2020] [Accepted: 12/25/2020] [Indexed: 11/16/2022]
Abstract
Asthma in children poses a significant clinical and public health burden. We examined the association between reported neighborhood traffic (a proxy for traffic-related air pollution) and asthma among 855 multi-racial children aged 4-8 years old who participated in the Environmental Influences on Child Health Outcomes (ECHO) cohort. We hypothesized that high neighborhood traffic density would be associated with the prevalence of asthma. Asthma/asthma-like symptoms (defined as current and/or past physician diagnosed asthma, past wheezing, or nighttime cough or wheezing in the past 12 months) was assessed by parental report. The relationship between neighborhood traffic and asthma/asthma-like symptoms was assessed using logistic regression. The prevalence of asthma/asthma-like symptoms among study participants was 23%, and 15% had high neighborhood traffic. Children with significant neighborhood traffic had a higher odds of having asthma/asthma-like symptoms than children without neighborhood traffic [adjusted OR = 2.01 (95% CI: 1.12, 3.62)] after controlling for child's race-ethnicity, age, sex, maternal education, family history of asthma, play equipment in the home environment, public parks, obesity and prescribed asthma medication. Further characterization of neighborhood traffic is needed since many children live near high traffic zones and significant racial/ethnic disparities exist.
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Affiliation(s)
- Sarah Commodore
- Department of Environmental and Occupational Health, Indiana University, Bloomington, IN 47405, USA
| | - Pamela L. Ferguson
- Department of Public Health Sciences, Medical University of South Carolina, Charleston, SC 29425, USA; (P.L.F.); (B.N.); (J.P.); (E.S.); (J.E.V.); (K.J.H.)
| | - Brian Neelon
- Department of Public Health Sciences, Medical University of South Carolina, Charleston, SC 29425, USA; (P.L.F.); (B.N.); (J.P.); (E.S.); (J.E.V.); (K.J.H.)
| | - Roger Newman
- Department of Obstetrics and Gynecology, Medical University of South Carolina, Charleston, SC 29425, USA;
| | - William Grobman
- Department of Obstetrics and Gynecology, Northwestern University, Chicago, IL 60611, USA;
| | - Alan Tita
- Department of Obstetrics and Gynecology, University of Alabama at Birmingham, Birmingham, AL 35233, USA;
| | - John Pearce
- Department of Public Health Sciences, Medical University of South Carolina, Charleston, SC 29425, USA; (P.L.F.); (B.N.); (J.P.); (E.S.); (J.E.V.); (K.J.H.)
| | - Michael S. Bloom
- Department of Global and Community Health, George Mason University, Fairfax, VA 22030, USA;
| | - Erik Svendsen
- Department of Public Health Sciences, Medical University of South Carolina, Charleston, SC 29425, USA; (P.L.F.); (B.N.); (J.P.); (E.S.); (J.E.V.); (K.J.H.)
| | - James Roberts
- Department of Pediatrics, Medical University of South Carolina, Charleston, SC 29425, USA;
| | - Daniel Skupski
- Department of Obstetrics and Gynecology, New York-Presbyterian Queens Hospital, Queens, NY 11365, USA;
- Department of Obstetrics and Gynecology, Weill Cornell Graduate School of Medical Sciences, Cornell University, New York, NY 10021, USA
| | - Anthony Sciscione
- Department of Obstetrics and Gynecology, Christiana Care Health System, Wilmington, DE 19899, USA;
| | - Kristy Palomares
- Department of Obstetrics and Gynecology, Saint Peter’s University Hospital, New Brunswick, NJ 08901, USA;
| | - Rachel Miller
- Department of Medicine, Division of Clinical Immunology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA;
| | - Ronald Wapner
- Columbia University Irving Medical Center, Department of Obstetrics and Gynecology, Columbia University, New York, NY 10032, USA;
| | - John E. Vena
- Department of Public Health Sciences, Medical University of South Carolina, Charleston, SC 29425, USA; (P.L.F.); (B.N.); (J.P.); (E.S.); (J.E.V.); (K.J.H.)
| | - Kelly J. Hunt
- Department of Public Health Sciences, Medical University of South Carolina, Charleston, SC 29425, USA; (P.L.F.); (B.N.); (J.P.); (E.S.); (J.E.V.); (K.J.H.)
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11
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Rodriguez A, Rodrigues L, Chico M, Vaca M, Barreto ML, Brickley E, Cooper PJ. Measuring urbanicity as a risk factor for childhood wheeze in a transitional area of coastal ecuador: a cross-sectional analysis. BMJ Open Respir Res 2020; 7:7/1/e000679. [PMID: 33257440 PMCID: PMC7705553 DOI: 10.1136/bmjresp-2020-000679] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 10/19/2020] [Accepted: 11/03/2020] [Indexed: 11/13/2022] Open
Abstract
Background The urbanisation process has been associated with increases in asthma prevalence, an observation supported largely by studies comparing urban with rural populations. The nature of this association remains poorly understood, likely because of the limitations of the urban–rural approach to understand what a multidimensional process is. Objective This study explored the relationship between the urbanisation process and asthma prevalence using a multidimensional and quantitative measure of urbanicity. Methods A cross-sectional analysis was conducted in 1843 children living in areas with diverse levels of urbanisation in the district of Quinindé, Ecuador in 2013–2015. Categorical principal components analysis was used to generate an urbanicity score derived from 18 indicators measured at census ward level based on data from the national census in 2010. Indicators represent demographic, socioeconomic, built environment and geographical dimensions of the urbanisation process. Geographical information system analysis was used to allocate observations and urban characteristics to census wards. Logistic random effects regression models were used to identify associations between urbanicity score, urban indicators and three widely used definitions for asthma. Results The prevalence of wheeze ever, current wheeze and doctor diagnosis of asthma was 33.3%, 13% and 6.9%, respectively. The urbanicity score ranged 0–10. Positive significant associations were observed between the urbanicity score and wheeze ever (adjusted OR=1.033, 95% CI 1.01 to 1.07, p=0.05) and doctor diagnosis (adjusted OR=1.06, 95% CI 1.02 to 1.1, p=0.001). For each point of increase in urbanicity score, the prevalence of wheeze ever and doctor diagnosis of asthma increased by 3.3% and 6%, respectively. Variables related to socioeconomic and geographical dimensions of the urbanisation process were associated with greater prevalence of wheeze/asthma outcomes. Conclusions Even small increases in urbanicity are associated with a higher prevalence of asthma in an area undergoing the urban transition. The use of a multidimensional urbanicity indicator has greater explanatory power than the widely used urban–rural dichotomy to improve our understanding of how the process of urbanisation affects the risk of asthma.
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Affiliation(s)
- Alejandro Rodriguez
- Facultad de ciencias Médicas de la salud y la Vida, Universidad Internacional del Ecuador, Quito, Pichincha, Ecuador .,SCAALA project, Fundacion Ecuatoriana para la Investigacion en Salud (FEPIS), Quininde, Esmeraldas, Ecuador
| | - Laura Rodrigues
- Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, UK
| | - Martha Chico
- SCAALA project, Fundacion Ecuatoriana para la Investigacion en Salud (FEPIS), Quininde, Esmeraldas, Ecuador
| | - Maritza Vaca
- SCAALA project, Fundacion Ecuatoriana para la Investigacion en Salud (FEPIS), Quininde, Esmeraldas, Ecuador
| | - Mauricio Lima Barreto
- Centro de de Integração de Dados e Conhecimentos para Saúde (CIDACS) FIOCRUZ, Salvador, Bahia, Brazil.,Instituto de Saude Coletiva, Universidade Federal da Bahia, Salvador, Bahia, Brazil
| | - Elizabeth Brickley
- Faculty of Epidemiology and Population Health, London School of Hygiene & Tropical Medicine, London, UK
| | - Philip J Cooper
- Facultad de ciencias Médicas de la salud y la Vida, Universidad Internacional del Ecuador, Quito, Pichincha, Ecuador.,Institute of Infection and Immunity, St George's University of London, London, Esmeraldas, UK
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12
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Mpairwe H, Nkurunungi G, Tumwesige P, Akurut H, Namutebi M, Nambuya I, Nnaluwooza M, Apule B, Onen C, Katongole T, Niwagaba E, Mukasa M, Webb EL, Elliott AM, Pearce N. Risk factors associated with rhinitis, allergic conjunctivitis and eczema among schoolchildren in Uganda. Clin Exp Allergy 2020; 51:108-119. [PMID: 33098716 PMCID: PMC7612100 DOI: 10.1111/cea.13769] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 08/31/2020] [Accepted: 10/19/2020] [Indexed: 01/19/2023]
Abstract
Background The prevalence of allergy-related diseases (ARDs), including rhinitis, allergic conjunctivitis and eczema, is on the increase globally. The causes of this increase are not well established. Objectives To investigate the risk factors associated with ARDs among schoolchildren in Uganda. Methods We conducted a secondary data analysis of a large asthma case–control study involving 1700 schoolchildren, 5–17 years, in urban Uganda. ARDs were defined according to the International Study of Asthma and Allergies in Childhood (ISAAC) questionnaire. Skin prick testing (SPT) was conducted using standard procedures and allergen-specific IgE (asIgE) using ImmunoCAP®. We employed inverse probability weighted analysis to generate estimated prevalence data and weighted odds ratios. Results The lifetime estimated weighted prevalence of reported rhinitis, allergic conjunctivitis and eczema was 43.3%, 39.5% and 13.5%; weighted prevalence in 12 months was 10.1%, 9.1% and 2.3%, respectively. There was overlap of ARDs, with 66.3% of 1193 schoolchildren who reported having ever an ARDs (including asthma) reporting two or more. Risk factors associated with reported rhinitis in the last 12 months were city residence at birth [adjusted odds ratio (95% confidence interval) 2.66 (1.42–4.99) compared to rural]; father’s [2.62 (1.79–3.83)] and mother’s history of allergic disease [2.12 (1.48–3.02)]; frequent de-worming in the last 12 months [2.01 (1.30–3.11), ≥2 versus none]; current high frequency of ‘trucks passing on the street near home’ [2.59 (1.48–4.52), ‘almost all the time’ versus rarely] and positive SPT [1.54 (1.09–2.18)] but not asIgE [1.38 (0.60–3.15)]. The same pattern of risk factors was observed for allergic conjunctivitis and eczema. Conclusion We found extensive multi-morbidity of, and overlap in the risk factors for, rhinitis, conjunctivitis and eczema—similar to asthma risk factors—among schoolchildren in urban Uganda. This suggests a similar underlying cause for all ARDs, associated with exposure to urban lifestyles and environment in Uganda.
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Affiliation(s)
- Harriet Mpairwe
- Medical Research Council/Uganda Virus Research Institute and London School of Hygiene and Tropical Medicine Uganda Research Unit, Entebbe, Uganda.,London School of Hygiene and Tropical Medicine, London, UK
| | - Gyaviira Nkurunungi
- Medical Research Council/Uganda Virus Research Institute and London School of Hygiene and Tropical Medicine Uganda Research Unit, Entebbe, Uganda
| | - Pius Tumwesige
- Medical Research Council/Uganda Virus Research Institute and London School of Hygiene and Tropical Medicine Uganda Research Unit, Entebbe, Uganda
| | - Hellen Akurut
- Medical Research Council/Uganda Virus Research Institute and London School of Hygiene and Tropical Medicine Uganda Research Unit, Entebbe, Uganda
| | - Milly Namutebi
- Medical Research Council/Uganda Virus Research Institute and London School of Hygiene and Tropical Medicine Uganda Research Unit, Entebbe, Uganda
| | - Irene Nambuya
- Medical Research Council/Uganda Virus Research Institute and London School of Hygiene and Tropical Medicine Uganda Research Unit, Entebbe, Uganda
| | - Marble Nnaluwooza
- Medical Research Council/Uganda Virus Research Institute and London School of Hygiene and Tropical Medicine Uganda Research Unit, Entebbe, Uganda
| | - Barbara Apule
- Medical Research Council/Uganda Virus Research Institute and London School of Hygiene and Tropical Medicine Uganda Research Unit, Entebbe, Uganda
| | - Caroline Onen
- Medical Research Council/Uganda Virus Research Institute and London School of Hygiene and Tropical Medicine Uganda Research Unit, Entebbe, Uganda
| | - Tonny Katongole
- Medical Research Council/Uganda Virus Research Institute and London School of Hygiene and Tropical Medicine Uganda Research Unit, Entebbe, Uganda
| | - Emmanuel Niwagaba
- Medical Research Council/Uganda Virus Research Institute and London School of Hygiene and Tropical Medicine Uganda Research Unit, Entebbe, Uganda
| | - Mike Mukasa
- Medical Research Council/Uganda Virus Research Institute and London School of Hygiene and Tropical Medicine Uganda Research Unit, Entebbe, Uganda
| | - Emily L Webb
- Medical Research Council/Uganda Virus Research Institute and London School of Hygiene and Tropical Medicine Uganda Research Unit, Entebbe, Uganda.,London School of Hygiene and Tropical Medicine, London, UK
| | - Alison M Elliott
- Medical Research Council/Uganda Virus Research Institute and London School of Hygiene and Tropical Medicine Uganda Research Unit, Entebbe, Uganda.,London School of Hygiene and Tropical Medicine, London, UK
| | - Neil Pearce
- Medical Research Council/Uganda Virus Research Institute and London School of Hygiene and Tropical Medicine Uganda Research Unit, Entebbe, Uganda.,London School of Hygiene and Tropical Medicine, London, UK
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13
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Ambient Air Pollution and Variation in Multiple Domains of Asthma Morbidity among Peruvian Children. Ann Am Thorac Soc 2020; 16:348-355. [PMID: 30365919 DOI: 10.1513/annalsats.201807-448oc] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
RATIONALE A large portion of asthma morbidity occurs in low- and middle-income countries, and Peru suffers particularly high asthma prevalence. Ambient air exposures are also high, and likely play a role. Most studies of environmental exposures focus on understanding contributors to health care utilization or mortality risk; however, less severe outcomes may still impact quality of life (QOL). OBJECTIVES To study the association between multiple pollutants and several asthma domains in Peruvian children. METHODS A total of 484 children aged 9-19 years with asthma were followed for 6-9 months, and evaluated for asthma control, asthma-related QOL, missed school days, and health care utilization. We used geographically distributed monitors to estimate air pollutant concentrations and multivariable generalized linear mixed models to model asthma outcomes as a function of pollutants. RESULTS A total of 67% of children had moderate to severe persistent asthma. In multipollutant models, higher particulate matter less than 2.5 μm in aerodynamic diameter (PM2.5), black carbon, and nitrogen dioxide concentrations were independently associated with worse asthma control. For each interquartile range increase in PM2.5 or nitrogen dioxide concentration, there was a 59% or 34% higher odds of uncontrolled asthma, respectively. If the proportion of PM2.5 that was black carbon increased, there were increased odds of uncontrolled asthma. Similarly, pollutants were independently associated with worse asthma-related QOL, and PM exposure was associated with increased risk of health care utilization. CONCLUSIONS Our study highlights the importance of pollutant exposures on multiple domains of asthma morbidity among Peruvian children, including not only acute exacerbations, but also on general asthma burden, such as worse asthma symptom control and QOL.
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14
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Xiong H, Huang Q, He C, Shuai T, Yan P, Zhu L, Yang K, Liu J. Prevalence of chronic obstructive pulmonary disease at high altitude: a systematic review and meta-analysis. PeerJ 2020; 8:e8586. [PMID: 32280564 PMCID: PMC7134014 DOI: 10.7717/peerj.8586] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 01/17/2020] [Indexed: 12/13/2022] Open
Abstract
Background and objective Recently, several studies have investigated the prevalence of chronic obstructive pulmonary disease (COPD) at high altitude (>1,500 m). However, much remains to be understood about the correlation between altitude and COPD. We aimed to summarize the prevalence of COPD at high-altitudes and find out if altitude could be a risk factor for COPD. Methods We searched PubMed/Medline, Cochrane Library, Web of Science, SCOPUS, OVID, Chinese Biomedical Literature Database (CBM) and Embase databases from inception to April 30th, 2019, with no language restriction. We used STATA 14.0 to analyze the extracted data. A random-effect model was used to calculate the combined OR and 95% CI. Heterogeneity was assessed by the I2 statistic versus P-value. We performed a subgroup analysis to analyze possible sources of heterogeneity. The Egger’s test and the Begg’s test were used to assess any publication bias. Results We retrieved 4,574 studies from seven databases and finally included 10 studies (54,578 participants). Males ranged from 18.8% to 49.3% and the population who smoked ranged from 3.3% to 53.3%. The overall prevalence of COPD at high-altitude was 10.0% (95% CI [0.08–0.12], P < 0.001). In a subgroup analysis, based on different regions, the results showed that the prevalence in Asia was higher than that in Europe and America. Seven studies compared the relationship between the prevalence of COPD at high-altitudes and the lowlands. The results showed that altitude was not an independent risk factor for the prevalence of COPD (ORadj = 1.18, 95% CI [0.85–1.62], P = 0.321). There was no publication bias among the studies. Conclusions Our study found a higher prevalence of COPD at high-altitudes than those from average data. However, altitude was not found to be an independent risk factor for developing COPD (PROSPERO Identifier: CRD42019135012).
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Affiliation(s)
- Huaiyu Xiong
- The First Clinical Medical College of the First Hospital of Lanzhou University, Lanzhou, China.,Department of Intensive Care Unit, The First Hospital of Lanzhou University, Lanzhou, China.,Evidence-Based Medicine Center, School of Basic Medical Sciences, Lanzhou University, Lanzhou, China
| | - Qiangru Huang
- The First Clinical Medical College of the First Hospital of Lanzhou University, Lanzhou, China.,Department of Intensive Care Unit, The First Hospital of Lanzhou University, Lanzhou, China.,Evidence-Based Medicine Center, School of Basic Medical Sciences, Lanzhou University, Lanzhou, China
| | - Chengying He
- Department of Intensive Care Unit, The First Hospital of Lanzhou University, Lanzhou, China
| | - Tiankui Shuai
- The First Clinical Medical College of the First Hospital of Lanzhou University, Lanzhou, China.,Department of Intensive Care Unit, The First Hospital of Lanzhou University, Lanzhou, China.,Evidence-Based Medicine Center, School of Basic Medical Sciences, Lanzhou University, Lanzhou, China
| | - Peijing Yan
- Evidence-Based Medicine Center, School of Basic Medical Sciences, Lanzhou University, Lanzhou, China.,Institute of Clinical Research and Evidence Based Medicine, The Gansu Provincial Hospital, Lanzhou, China
| | - Lei Zhu
- The First Clinical Medical College of the First Hospital of Lanzhou University, Lanzhou, China.,Department of Intensive Care Unit, The First Hospital of Lanzhou University, Lanzhou, China
| | - Kehu Yang
- Evidence-Based Medicine Center, School of Basic Medical Sciences, Lanzhou University, Lanzhou, China.,Institute of Clinical Research and Evidence Based Medicine, The Gansu Provincial Hospital, Lanzhou, China.,Evidence Based Social Science Research Center, Lanzhou University, Lanzhou, China.,Key Laboratory of Evidence Based Medicine and Knowledge Translation of Gansu Province, Lanzhou, China
| | - Jian Liu
- The First Clinical Medical College of the First Hospital of Lanzhou University, Lanzhou, China.,Department of Intensive Care Unit, The First Hospital of Lanzhou University, Lanzhou, China
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15
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Mpairwe H, Namutebi M, Nkurunungi G, Tumwesige P, Nambuya I, Mukasa M, Onen C, Nnaluwooza M, Apule B, Katongole T, Oduru G, Kahwa J, Webb EL, Lubyayi L, Pearce N, Elliott AM. Risk factors for asthma among schoolchildren who participated in a case-control study in urban Uganda. eLife 2019; 8:49496. [PMID: 31729315 PMCID: PMC6914334 DOI: 10.7554/elife.49496] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Accepted: 11/13/2019] [Indexed: 12/20/2022] Open
Abstract
Data on asthma aetiology in Africa are scarce. We investigated the risk factors for asthma among schoolchildren (5–17 years) in urban Uganda. We conducted a case-control study, among 555 cases and 1115 controls. Asthma was diagnosed by study clinicians. The main risk factors for asthma were tertiary education for fathers (adjusted OR (95% CI); 2.32 (1.71–3.16)) and mothers (1.85 (1.38–2.48)); area of residence at birth, with children born in a small town or in the city having an increased asthma risk compared to schoolchildren born in rural areas (2.16 (1.60–2.92)) and (2.79 (1.79–4.35)), respectively; father’s and mother’s history of asthma; children’s own allergic conditions; atopy; and cooking on gas/electricity. In conclusion, asthma was associated with a strong rural-town-city risk gradient, higher parental socio-economic status and urbanicity. This work provides the basis for future studies to identify specific environmental/lifestyle factors responsible for increasing asthma risk among children in urban areas in LMICs. Asthma is a chronic disease of the airways that leads to breathing difficulty and sometimes death: the condition affects about 235 million people worldwide, especially children. Scientists still do not know exactly what causes asthma, but studies in Europe and North America suggest that individuals born or raised in rural areas are less likely to be affected. However, few studies have examined asthma in African countries, where urbanization is often quickly increasing. Examining the factors associated with the disease as more people move to cities may provide new clues about how asthma emerges, and how to prevent it. To this end, Mpairwe et al. conducted a study with over 1,670 schoolchildren in Uganda. Those born or raised in rural areas were least likely to have asthma, but the risk doubled among children from small towns, and tripled in those born or who grew up in the city. Children whose parents had a higher education and socioeconomic status had the highest asthma risk, but more work is required to understand why this is the case. The study by Mpairwe et al. is the first step towards identifying environmental and lifestyle factors associated with increased asthma risk in Africa. Further studies may help scientists to understand how beginning life in a more urban area plays a role in the development of the disease.
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Affiliation(s)
- Harriet Mpairwe
- Medical Research Council/Uganda Virus Research Institute and London School of Hygiene and Tropical Medicine Uganda Research Unit, Entebbe, Uganda
| | - Milly Namutebi
- Medical Research Council/Uganda Virus Research Institute and London School of Hygiene and Tropical Medicine Uganda Research Unit, Entebbe, Uganda
| | - Gyaviira Nkurunungi
- Medical Research Council/Uganda Virus Research Institute and London School of Hygiene and Tropical Medicine Uganda Research Unit, Entebbe, Uganda
| | - Pius Tumwesige
- Medical Research Council/Uganda Virus Research Institute and London School of Hygiene and Tropical Medicine Uganda Research Unit, Entebbe, Uganda
| | - Irene Nambuya
- Medical Research Council/Uganda Virus Research Institute and London School of Hygiene and Tropical Medicine Uganda Research Unit, Entebbe, Uganda
| | - Mike Mukasa
- Medical Research Council/Uganda Virus Research Institute and London School of Hygiene and Tropical Medicine Uganda Research Unit, Entebbe, Uganda
| | - Caroline Onen
- Medical Research Council/Uganda Virus Research Institute and London School of Hygiene and Tropical Medicine Uganda Research Unit, Entebbe, Uganda
| | - Marble Nnaluwooza
- Medical Research Council/Uganda Virus Research Institute and London School of Hygiene and Tropical Medicine Uganda Research Unit, Entebbe, Uganda
| | - Barbara Apule
- Medical Research Council/Uganda Virus Research Institute and London School of Hygiene and Tropical Medicine Uganda Research Unit, Entebbe, Uganda
| | - Tonny Katongole
- Medical Research Council/Uganda Virus Research Institute and London School of Hygiene and Tropical Medicine Uganda Research Unit, Entebbe, Uganda
| | - Gloria Oduru
- Medical Research Council/Uganda Virus Research Institute and London School of Hygiene and Tropical Medicine Uganda Research Unit, Entebbe, Uganda
| | - Joseph Kahwa
- Medical Research Council/Uganda Virus Research Institute and London School of Hygiene and Tropical Medicine Uganda Research Unit, Entebbe, Uganda
| | - Emily L Webb
- London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Lawrence Lubyayi
- Medical Research Council/Uganda Virus Research Institute and London School of Hygiene and Tropical Medicine Uganda Research Unit, Entebbe, Uganda
| | - Neil Pearce
- London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Alison M Elliott
- Medical Research Council/Uganda Virus Research Institute and London School of Hygiene and Tropical Medicine Uganda Research Unit, Entebbe, Uganda.,London School of Hygiene and Tropical Medicine, London, United Kingdom
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16
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Rodriguez A, Brickley E, Rodrigues L, Normansell RA, Barreto M, Cooper PJ. Urbanisation and asthma in low-income and middle-income countries: a systematic review of the urban-rural differences in asthma prevalence. Thorax 2019; 74:1020-1030. [PMID: 31278168 PMCID: PMC6860411 DOI: 10.1136/thoraxjnl-2018-211793] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2018] [Revised: 03/20/2019] [Accepted: 04/24/2019] [Indexed: 11/04/2022]
Abstract
BACKGROUND Urbanisation has been associated with temporal and geographical differences in asthma prevalence in low-income and middle-income countries (LMICs). However, little is known of the mechanisms by which urbanisation and asthma are associated, perhaps explained by the methodological approaches used to assess the urbanisation-asthma relationship. OBJECTIVE This review evaluated how epidemiological studies have assessed the relationship between asthma and urbanisation in LMICs, and explored urban/rural differences in asthma prevalence. METHODS Asthma studies comparing urban/rural areas, comparing cities and examining intraurban variation were assessed for eligibility. Included publications were evaluated for methodological quality and pooled OR were calculated to indicate the risk of asthma in urban over rural areas. RESULTS Seventy articles were included in our analysis. Sixty-three compared asthma prevalence between urban and rural areas, five compared asthma prevalence between cities and two examined intraurban variation in asthma prevalence. Urban residence was associated with a higher prevalence of asthma, regardless of asthma definition: current-wheeze OR:1.46 (95% CI:1.22 to 1.74), doctor diagnosis OR:1.89 (95% CI:1.47 to 2.41), wheeze-ever OR:1.44 (95% CI:1.15 to 1.81), self-reported asthma OR:1.77 (95% CI:1.33 to 2.35), asthma questionnaire OR:1.52 (95% CI:1.06 to 2.16) and exercise challenge OR:1.96 (95% CI:1.32 to 2.91). CONCLUSIONS Most evidence for the relationship between urbanisation and asthma in LMICs comes from studies comparing urban and rural areas. These studies tend to show a greater prevalence of asthma in urban compared to rural populations. However, these studies have been unable to identify which specific characteristics of the urbanisation process may be responsible. An approach to understand how different dimensions of urbanisation, using contextual household and individual indicators, is needed for a better understanding of how urbanisation affects asthma. PROSPERO REGISTRATION NUMBER CRD42017064470.
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Affiliation(s)
- Alejandro Rodriguez
- Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, UK
- Facultad de Ciencias Médicas de la Salud y la Vida, Universidad Internacional del Ecuador, Quito, Ecuador
- Fundación Ecuatoriana para la Investigación en Salud, Quito, Ecuador
| | - Elizabeth Brickley
- Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, UK
| | - Laura Rodrigues
- Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, UK
| | | | - Mauricio Barreto
- Instituto de Saude Coletiva, Universidad Federal da Bahia, Salvador, Brazil
- Centrode de Integração de Dados e Conhecimentos para Saúde (CIDACS), FIOCRUZ, Salvador, Brazil
| | - Philip J Cooper
- Facultad de Ciencias Médicas de la Salud y la Vida, Universidad Internacional del Ecuador, Quito, Ecuador
- Fundación Ecuatoriana para la Investigación en Salud, Quito, Ecuador
- Institute of Infection and Immunity, St George's University of London, London, UK
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Checkley W. What have we learnt from studies on the association between urbanisation and asthma prevalence? Thorax 2019; 74:1011-1012. [PMID: 31534028 DOI: 10.1136/thoraxjnl-2019-213319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/16/2019] [Indexed: 11/04/2022]
Affiliation(s)
- William Checkley
- Division of Pulmonary and Critical Care, Johns Hopkins University, Baltimore, Maryland, USA
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Fleming M, Fitton CA, Steiner MFC, McLay JS, Clark D, King A, Mackay DF, Pell JP. Educational and health outcomes of children treated for asthma: Scotland-wide record linkage study of 683 716 children. Eur Respir J 2019; 54:13993003.02309-2018. [PMID: 31196949 PMCID: PMC6727030 DOI: 10.1183/13993003.02309-2018] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Accepted: 05/27/2019] [Indexed: 12/05/2022]
Abstract
Background The global prevalence of childhood asthma is increasing. The condition impacts physical and psychosocial morbidity; therefore, wide-ranging effects on health and education outcomes are plausible. Methods Linkage of eight Scotland-wide databases, covering dispensed prescriptions, hospital admissions, maternity records, death certificates, annual pupil census, examinations, school absences/exclusions and unemployment, provided data on 683 716 children attending Scottish schools between 2009 and 2013. We compared schoolchildren on medication for asthma with peers, adjusting for sociodemographic, maternity and comorbidity confounders, and explored effect modifiers and mediators. Results The 45 900 (6.0%) children treated for asthma had an increased risk of hospitalisation, particularly within the first year of treatment (incidence rate ratio 1.98, 95% CI 1.93–2.04), and increased mortality (HR 1.77, 95% CI 1.30–2.40). They were more likely to have special educational need for mental (OR 1.76, 95% CI 1.49–2.08) and physical (OR 2.76, 95% CI 2.57–2.95) health reasons, and performed worse in school exams (OR 1.11, 95% CI 1.06–1.16). Higher absenteeism (incidence rate ratio 1.25, 95% CI 1.24–1.26) partially explained their poorer attainment. Conclusions Children with treated asthma have poorer education and health outcomes than their peers. Educational interventions that mitigate the adverse effects of absenteeism should be considered. Asthmatic children experience significant disadvantage in addition to poor health. Adverse effects on other aspects of their life, such as education, need to be recognised and addressed.bit.ly/2W5K4Nib
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Affiliation(s)
- Michael Fleming
- Institute of Health and Wellbeing, University of Glasgow, Glasgow, UK
| | | | | | - James S McLay
- Dept of Child Health, University of Aberdeen, Aberdeen, UK
| | - David Clark
- Information Services Division, National Services Scotland, NHS Scotland, Edinburgh, UK
| | | | - Daniel F Mackay
- Institute of Health and Wellbeing, University of Glasgow, Glasgow, UK
| | - Jill P Pell
- Institute of Health and Wellbeing, University of Glasgow, Glasgow, UK
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Ponte EV, Lima A, Almeida PCA, de Jesus JPV, Souza-Machado A, Barreto ML, Cruz ÁA. Rural to urban migration contributes to the high burden of asthma in the urban area. CLINICAL RESPIRATORY JOURNAL 2019; 13:560-566. [PMID: 31301264 DOI: 10.1111/crj.13058] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Revised: 03/02/2019] [Accepted: 07/05/2019] [Indexed: 11/29/2022]
Abstract
INTRODUCTION It is unknown whether rural-urban migration contributes to worse the burden of asthma in the cities. OBJECTIVES The aim of this study was to evaluate whether subjects with asthma that migrated from rural areas to a large urban center in Brazil have more severe disease than asthmatic subjects that was born and always lived in the urban area. METHODS This is a case-control study. We enrolled two groups of subjects with asthma currently living in a large urban center in Brazil: 486 subjects with moderate-severe asthma and 432 subjects with mild asthma. RESULTS Rural-urban migrants had higher odds of moderate-severe asthma [adjusted OR 1.57, 95% CI (1.18-2.01)] and uncontrolled symptoms of asthma [adjusted OR 1.80, 95% CI (1.16-2.76)] than urban-born subjects. CONCLUSIONS Rural-urban migrants in Brazil have more severe asthma than urban-born subjects. Our results suggest that rural-urban migration is associated with the high burden of asthma in the urban area.
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Affiliation(s)
- Eduardo Vieira Ponte
- Departamento de Clínica Médica, Faculdade de Medicina de Jundiaí, Jundiaí, Brazil
| | - Aline Lima
- Núcleo de Excelência em Asma, Universidade Federal da Bahia, Salvador, Brazil
| | | | | | | | | | - Álvaro A Cruz
- Núcleo de Excelência em Asma, Universidade Federal da Bahia, Salvador, Brazil
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Huang K, Yang T, Xu J, Yang L, Zhao J, Zhang X, Bai C, Kang J, Ran P, Shen H, Wen F, Chen Y, Sun T, Shan G, Lin Y, Xu G, Wu S, Wang C, Wang R, Shi Z, Xu Y, Ye X, Song Y, Wang Q, Zhou Y, Li W, Ding L, Wan C, Yao W, Guo Y, Xiao F, Lu Y, Peng X, Zhang B, Xiao D, Wang Z, Chen Z, Bu X, Zhang H, Zhang X, An L, Zhang S, Zhu J, Cao Z, Zhan Q, Yang Y, Liang L, Tong X, Dai H, Cao B, Wu T, Chung KF, He J, Wang C. Prevalence, risk factors, and management of asthma in China: a national cross-sectional study. Lancet 2019; 394:407-418. [PMID: 31230828 DOI: 10.1016/s0140-6736(19)31147-x] [Citation(s) in RCA: 351] [Impact Index Per Article: 70.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Revised: 04/30/2019] [Accepted: 05/07/2019] [Indexed: 02/05/2023]
Abstract
BACKGROUND Asthma is a common chronic airway disease worldwide. Despite its large population size, China has had no comprehensive study of the national prevalence, risk factors, and management of asthma. We therefore aimed to estimate the national prevalence of asthma in a representative sample of the Chinese population. METHODS A representative sample of 57 779 adults aged 20 years or older was recruited for the national cross-sectional China Pulmonary Health (CPH) study using a multi-stage stratified sampling method with parameters derived from the 2010 census. Ten Chinese provinces, representative of all socioeconomic settings, from six geographical regions were selected, and all assessments were done in local health centres. Exclusion criteria were temporary residence, inability to take a spirometry test, hospital treatment of cardiovascular conditions or tuberculosis, and pregnancy and breastfeeding. Asthma was determined on the basis of a self-reported history of diagnosis by a physician or by wheezing symptoms in the preceding 12 months. All participants were assessed with a standard asthma questionnaire and were classed as having or not having airflow limitation through pulmonary function tests before and after the use of a bronchodilator (400 μg of salbutamol). Risk factors for asthma were examined by multivariable-adjusted analyses done in all participants for whom data on the variables of interest were available. Disease management was assessed by the self-reported history of physician diagnosis, treatments, and hospital visits in people with asthma. FINDINGS Between June 22, 2012, and May 25, 2015, 57 779 participants were recruited into the CPH study. 50 991 (21 446 men and 29 545 women) completed the questionnaire survey and had reliable post-bronchodilator pulmonary function test results and were thus included in the final analysis. The overall prevalence of asthma in our sample was 4·2% (95% CI 3·1-5·6), representing 45·7 million Chinese adults. The prevalence of asthma with airflow limitation was 1·1% (0·9-1·4), representing 13·1 million adults. Cigarette smoking (odds ratio [OR] 1·89, 95% CI 1·26-2·84; p=0·004), allergic rhinitis (3·06, 2·26-4·15; p<0·0001), childhood pneumonia or bronchitis (2·43, 1·44-4·10; p=0·002), parental history of respiratory disease (1·44, 1·02-2·04; p=0·040), and low education attainment (p=0·045) were associated with prevalent asthma. In 2032 people with asthma, only 28·8% (95% CI 19·7-40·0) reported ever being diagnosed by a physician, 23·4% (13·9-36·6) had a previous pulmonary function test, and 5·6% (3·1-9·9) had been treated with inhaled corticosteroids. Furthermore, 15·5% (11·4-20·8) people with asthma reported at least one emergency room visit and 7·2% (4·9-10·5) at least one hospital admission due to exacerbation of respiratory symptoms within the preceding year. INTERPRETATION Asthma is prevalent but largely undiagnosed and undertreated in China. It is crucial to increase the awareness of asthma and disseminate standardised treatment in clinical settings to reduce the disease burden. FUNDING National Key R&D Program of China, Ministry of Science and Technology of China; the Special Research Foundation for Public Welfare of Health, Ministry of Health of China; the Chinese National Research Program for Key Issues in Air Pollution Control; and the National Natural Science Foundation of China.
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Affiliation(s)
- Kewu Huang
- Beijing Key Laboratory of Respiratory and Pulmonary Circulation Disorders, Department of Pulmonary and Critical Care Medicine, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China; Beijing Institute of Respiratory Medicine, Beijing, China
| | - Ting Yang
- Department of Pulmonary and Critical Care Medicine, Center of Respiratory Medicine, China-Japan Friendship Hospital, Beijing, China; Institute of Respiratory Medicine, Chinese Academy of Medical Sciences, Beijing, China; National Clinical Research Center for Respiratory Diseases, Beijing, China; Department of Respiratory Medicine, Capital Medical University, Beijing, China
| | - Jianying Xu
- Department of Pulmonary and Critical Care Medicine, Shanxi Dayi Hospital, Taiyuan, China
| | - Lan Yang
- Department of Pulmonary and Critical Care Medicine, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Jianping Zhao
- Department of Pulmonary and Critical Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiangyan Zhang
- Department of Pulmonary and Critical Care Medicine, Center of Respiratory Medicine, China-Japan Friendship Hospital, Beijing, China; Institute of Respiratory Medicine, Chinese Academy of Medical Sciences, Beijing, China; National Clinical Research Center for Respiratory Diseases, Beijing, China; Department of Respiratory Medicine, Capital Medical University, Beijing, China
| | - Chunxue Bai
- Department of Pulmonary and Critical Care Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Jian Kang
- Department of Pulmonary and Critical Care Medicine, First Hospital of China Medical University, Shenyang, China
| | - Pixin Ran
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Diseases, Guangzhou Institute of Respiratory Diseases, First Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Huahao Shen
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University, School of Medicine, Hangzhou, China
| | - Fuqiang Wen
- State Key Laboratory of Biotherapy of China and Department of Respiratory and Critical Care Medicine, West China Hospital of Sichuan University, Chengdu, China
| | - Yahong Chen
- Department of Respiratory and Critical Care Medicine, Peking University Third Hospital, Beijing, China
| | - Tieying Sun
- Department of Respiratory and Critical Care Medicine, Beijing Hospital, Beijing, China; National Center of Gerontology, Beijing Hospital, Beijing, China
| | - Guangliang Shan
- Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine, Peking Union Medical College, Beijing, China
| | - Yingxiang Lin
- Beijing Key Laboratory of Respiratory and Pulmonary Circulation Disorders, Department of Pulmonary and Critical Care Medicine, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China; Beijing Institute of Respiratory Medicine, Beijing, China
| | - Guodong Xu
- Institute of Clinical Medical Sciences, Center of Respiratory Medicine, China-Japan Friendship Hospital, Beijing, China
| | - Sinan Wu
- Institute of Clinical Medical Sciences, Center of Respiratory Medicine, China-Japan Friendship Hospital, Beijing, China; Institute of Respiratory Medicine, Chinese Academy of Medical Sciences, Beijing, China; National Clinical Research Center for Respiratory Diseases, Beijing, China
| | - Chaolong Wang
- School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ruiying Wang
- Department of Pulmonary and Critical Care Medicine, Shanxi Dayi Hospital, Taiyuan, China
| | - Zhihong Shi
- Department of Pulmonary and Critical Care Medicine, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Yongjian Xu
- Department of Pulmonary and Critical Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xianwei Ye
- Department of Pulmonary and Critical Care Medicine, Guizhou Provincial People's Hospital, Guiyang, China
| | - Yuanlin Song
- Department of Pulmonary and Critical Care Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Qiuyue Wang
- Department of Pulmonary and Critical Care Medicine, First Hospital of China Medical University, Shenyang, China
| | - Yumin Zhou
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Diseases, Guangzhou Institute of Respiratory Diseases, First Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Wen Li
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University, School of Medicine, Hangzhou, China
| | - Liren Ding
- Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University, School of Medicine, Hangzhou, China
| | - Chun Wan
- State Key Laboratory of Biotherapy of China and Department of Respiratory and Critical Care Medicine, West China Hospital of Sichuan University, Chengdu, China
| | - Wanzhen Yao
- Department of Respiratory and Critical Care Medicine, Peking University Third Hospital, Beijing, China
| | - Yanfei Guo
- Department of Respiratory and Critical Care Medicine, Beijing Hospital, Beijing, China; National Center of Gerontology, Beijing Hospital, Beijing, China
| | - Fei Xiao
- National Center of Gerontology, Beijing Hospital, Beijing, China
| | - Yong Lu
- Beijing Key Laboratory of Respiratory and Pulmonary Circulation Disorders, Department of Pulmonary and Critical Care Medicine, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China; Beijing Institute of Respiratory Medicine, Beijing, China
| | - Xiaoxia Peng
- Center for Clinical Epidemiology and Evidence-based Medicine, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Biao Zhang
- Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine, Peking Union Medical College, Beijing, China
| | - Dan Xiao
- Tobacco Medicine and Tobacco Cessation Center, Center of Respiratory Medicine, China-Japan Friendship Hospital, Beijing, China; Institute of Respiratory Medicine, Chinese Academy of Medical Sciences, Beijing, China; National Clinical Research Center for Respiratory Diseases, Beijing, China; WHO Collaborating Center for Tobacco Cessation and Respiratory Diseases Prevention, Beijing, China
| | - Zuomin Wang
- Department of Stomatology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
| | - Zhengming Chen
- Clinical Trial Service Unit & Epidemiological Studies Unit, Nuffield Department of Population Health, University of Oxford, Oxford, UK
| | - Xiaoning Bu
- Beijing Key Laboratory of Respiratory and Pulmonary Circulation Disorders, Department of Pulmonary and Critical Care Medicine, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China; Beijing Institute of Respiratory Medicine, Beijing, China
| | - Hong Zhang
- Beijing Key Laboratory of Respiratory and Pulmonary Circulation Disorders, Department of Pulmonary and Critical Care Medicine, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China; Beijing Institute of Respiratory Medicine, Beijing, China
| | - Xiaolei Zhang
- Department of Pulmonary and Critical Care Medicine, Guizhou Provincial People's Hospital, Guiyang, China
| | - Li An
- Beijing Key Laboratory of Respiratory and Pulmonary Circulation Disorders, Department of Pulmonary and Critical Care Medicine, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China; Beijing Institute of Respiratory Medicine, Beijing, China
| | - Shu Zhang
- Beijing Key Laboratory of Respiratory and Pulmonary Circulation Disorders, Department of Pulmonary and Critical Care Medicine, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China; Beijing Institute of Respiratory Medicine, Beijing, China
| | - Jianguo Zhu
- National Center of Gerontology, Beijing Hospital, Beijing, China
| | - Zhixin Cao
- Beijing Key Laboratory of Respiratory and Pulmonary Circulation Disorders, Department of Pulmonary and Critical Care Medicine, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China; Beijing Institute of Respiratory Medicine, Beijing, China
| | - Qingyuan Zhan
- Department of Pulmonary and Critical Care Medicine, Center of Respiratory Medicine, China-Japan Friendship Hospital, Beijing, China; Institute of Respiratory Medicine, Chinese Academy of Medical Sciences, Beijing, China; National Clinical Research Center for Respiratory Diseases, Beijing, China; Department of Respiratory Medicine, Capital Medical University, Beijing, China
| | - Yuanhua Yang
- Beijing Key Laboratory of Respiratory and Pulmonary Circulation Disorders, Department of Pulmonary and Critical Care Medicine, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China; Beijing Institute of Respiratory Medicine, Beijing, China
| | - Lirong Liang
- Department of Epidemiology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China; Beijing Institute of Respiratory Medicine, Beijing, China
| | - Xunliang Tong
- Department of Respiratory and Critical Care Medicine, Beijing Hospital, Beijing, China
| | - Huaping Dai
- Department of Pulmonary and Critical Care Medicine, Center of Respiratory Medicine, China-Japan Friendship Hospital, Beijing, China; Institute of Respiratory Medicine, Chinese Academy of Medical Sciences, Beijing, China; National Clinical Research Center for Respiratory Diseases, Beijing, China; Department of Respiratory Medicine, Capital Medical University, Beijing, China
| | - Bin Cao
- Department of Pulmonary and Critical Care Medicine, Center of Respiratory Medicine, China-Japan Friendship Hospital, Beijing, China; Institute of Respiratory Medicine, Chinese Academy of Medical Sciences, Beijing, China; National Clinical Research Center for Respiratory Diseases, Beijing, China; Department of Respiratory Medicine, Capital Medical University, Beijing, China
| | - Tangchun Wu
- School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Kian Fan Chung
- National Heart and Lung Institute, Imperial College London and Royal Brompton and Harefield NHS Trust, London, UK
| | - Jiang He
- Department of Epidemiology, Tulane University School of Public Health and Tropical Medicine, New Orleans, LA, USA
| | - Chen Wang
- Department of Pulmonary and Critical Care Medicine, Center of Respiratory Medicine, China-Japan Friendship Hospital, Beijing, China; Institute of Respiratory Medicine, Chinese Academy of Medical Sciences, Beijing, China; National Clinical Research Center for Respiratory Diseases, Beijing, China; WHO Collaborating Center for Tobacco Cessation and Respiratory Diseases Prevention, Beijing, China; Department of Respiratory Medicine, Capital Medical University, Beijing, China; Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
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Simkovich SM, Goodman D, Roa C, Crocker ME, Gianella GE, Kirenga BJ, Wise RA, Checkley W. The health and social implications of household air pollution and respiratory diseases. NPJ Prim Care Respir Med 2019; 29:12. [PMID: 31028270 PMCID: PMC6486605 DOI: 10.1038/s41533-019-0126-x] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Accepted: 03/05/2019] [Indexed: 12/29/2022] Open
Abstract
Approximately three billion individuals are exposed to household air pollution (HAP) from the burning of biomass fuels worldwide. Household air pollution is responsible for 2.9 million annual deaths and causes significant health, economic and social consequences, particularly in low- and middle-income countries. Although there is biological plausibility to draw an association between HAP exposure and respiratory diseases, existing evidence is either lacking or conflicting. We abstracted systematic reviews and meta-analyses for summaries available for common respiratory diseases in any age group and performed a literature search to complement these reviews with newly published studies. Based on the literature summarized in this review, HAP exposure has been associated with acute respiratory infections, tuberculosis, asthma, chronic obstructive pulmonary disease, pneumoconiosis, head and neck cancers, and lung cancer. No study, however, has established a causal link between HAP exposure and respiratory disease. Furthermore, few studies have controlled for tobacco smoke exposure and outdoor air pollution. More studies with consistent diagnostic criteria and exposure monitoring are needed to accurately document the association between household air pollution exposure and respiratory disease. Better environmental exposure monitoring is critical to better separate the contributions of household air pollution from that of other exposures, including ambient air pollution and tobacco smoking. Clinicians should be aware that patients with current or past HAP exposure are at increased risk for respiratory diseases or malignancies and may want to consider earlier screening in this population.
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Affiliation(s)
- Suzanne M Simkovich
- Division of Pulmonary and Critical Care, School of Medicine, Johns Hopkins University, Baltimore, MD, USA
- Center for Global Non-Communicable Diseases, School of Medicine, Johns Hopkins University, Baltimore, MD, USA
| | - Dina Goodman
- Division of Pulmonary and Critical Care, School of Medicine, Johns Hopkins University, Baltimore, MD, USA
- Center for Global Non-Communicable Diseases, School of Medicine, Johns Hopkins University, Baltimore, MD, USA
| | - Christian Roa
- Center for Global Non-Communicable Diseases, School of Medicine, Johns Hopkins University, Baltimore, MD, USA
| | - Mary E Crocker
- Center for Global Non-Communicable Diseases, School of Medicine, Johns Hopkins University, Baltimore, MD, USA
- Division of Pulmonary and Sleep Medicine, University of Washington, Seattle Children's Hospital, Seattle, WA, USA
| | - Gonzalo E Gianella
- Facultad de Medicina Alberto Hurtado, Universidad Peruana Cayetano Heredia, Lima, Peru
- Servicio de Neumología, Unidad de Cuidados Intensivos, Clinica Ricardo Palma, Lima, Peru
| | - Bruce J Kirenga
- Makerere Lung Institute, Makerere University, Kampala, Uganda
- Pulmonology Unit, Department of Medicine, Makerere University, Mulago Hospital, Kampala, Uganda
| | - Robert A Wise
- Division of Pulmonary and Critical Care, School of Medicine, Johns Hopkins University, Baltimore, MD, USA
| | - William Checkley
- Division of Pulmonary and Critical Care, School of Medicine, Johns Hopkins University, Baltimore, MD, USA.
- Center for Global Non-Communicable Diseases, School of Medicine, Johns Hopkins University, Baltimore, MD, USA.
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Siddharthan T, Grigsby M, Morgan B, Kalyesubula R, Wise RA, Kirenga B, Checkley W. Prevalence of chronic respiratory disease in urban and rural Uganda. Bull World Health Organ 2019; 97:318-327. [PMID: 31551628 PMCID: PMC6747035 DOI: 10.2471/blt.18.216523] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 12/07/2018] [Accepted: 02/25/2019] [Indexed: 01/10/2023] Open
Abstract
Objective To determine the prevalence of chronic respiratory diseases in urban and rural Uganda and to identify risk factors for these diseases. Methods The population-based, cross-sectional study included adults aged 35 years or older. All participants were evaluated by spirometry according to standard guidelines and completed questionnaires on respiratory symptoms, functional status and demographic characteristics. The presence of four chronic respiratory conditions was monitored: chronic obstructive pulmonary disease (COPD), asthma, chronic bronchitis and a restrictive spirometry pattern. Findings In total, 1502 participants (average age: 46.9 years) had acceptable, reproducible spirometry results: 837 (56%) in rural Nakaseke and 665 (44%) in urban Kampala. Overall, 46.5% (698/1502) were male. The age-adjusted prevalence of any chronic respiratory condition was 20.2%. The age-adjusted prevalence of COPD was significantly greater in rural than urban participants (6.1 versus 1.5%, respectively; P < 0.001), whereas asthma was significantly more prevalent in urban participants: 9.7% versus 4.4% in rural participants (P < 0.001). The age-adjusted prevalence of chronic bronchitis was similar in rural and urban participants (3.5 versus 2.2%, respectively; P = 0.62), as was that of a restrictive spirometry pattern (10.9 versus 9.4%; P = 0.82). For COPD, the population attributable risk was 51.5% for rural residence, 19.5% for tobacco smoking, 16.0% for a body mass index < 18.5 kg/m2 and 13.0% for a history of treatment for pulmonary tuberculosis. Conclusion The prevalence of chronic respiratory disease was high in both rural and urban Uganda. Place of residence was the most important risk factor for COPD and asthma.
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Affiliation(s)
- Trishul Siddharthan
- Division of Pulmonary and Critical Care, School of Medicine, Johns Hopkins University, 1830 E. Monument Street, Room 555, Baltimore, Maryland, MD 21287, United States of America
| | - Matthew Grigsby
- Division of Pulmonary and Critical Care, School of Medicine, Johns Hopkins University, 1830 E. Monument Street, Room 555, Baltimore, Maryland, MD 21287, United States of America
| | - Brooks Morgan
- Division of Pulmonary and Critical Care, School of Medicine, Johns Hopkins University, 1830 E. Monument Street, Room 555, Baltimore, Maryland, MD 21287, United States of America
| | | | - Robert A Wise
- Division of Pulmonary and Critical Care, School of Medicine, Johns Hopkins University, 1830 E. Monument Street, Room 555, Baltimore, Maryland, MD 21287, United States of America
| | - Bruce Kirenga
- College of Health Sciences, Makerere University, Kampala, Uganda
| | - William Checkley
- Division of Pulmonary and Critical Care, School of Medicine, Johns Hopkins University, 1830 E. Monument Street, Room 555, Baltimore, Maryland, MD 21287, United States of America
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Miele CH, Grigsby MR, Siddharthan T, Gilman RH, Miranda JJ, Bernabe-Ortiz A, Wise RA, Checkley W. Environmental exposures and systemic hypertension are risk factors for decline in lung function. Thorax 2018; 73:1120-1127. [PMID: 30061168 PMCID: PMC7289445 DOI: 10.1136/thoraxjnl-2017-210477] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Revised: 06/01/2018] [Accepted: 06/18/2018] [Indexed: 12/12/2022]
Abstract
BACKGROUND Chronic lung disease is a leading contributor to the global disease burden; however, beyond tobacco smoke, we do not fully understand what risk factors contribute to lung function decline in low-income and middle-income countries. METHODS We collected sociodemographic and clinical data in a randomly selected, age-stratified, sex-stratified and site-stratified population-based sample of 3048 adults aged ≥35 years from four resource-poor settings in Peru. We assessed baseline and annual pre-bronchodilator and post-bronchodilator lung function over 3 years. We used linear mixed-effects models to assess biological, socioeconomic and environmental risk factors associated with accelerated lung function decline. RESULTS Mean±SD enrolment age was 55.4±12.5 years, 49.2% were male and mean follow-up time was 2.36 (SD 0.61) years. Mean annual pre-bronchodilator FEV1 decline was 30.3 mL/year (95% CI 28.6 to 32.0) and pre-bronchodilator FVC decline was 32.2 mL/year (30.0 to 34.4). Using multivariable linear mixed-effects regression, we found that urban living, high-altitude dwelling and having hypertension accounted for 25.9% (95% CI 15.7% to 36.1%), 21.3% (11.1% to 31.5%) and 15.7% (3.7% to 26.9%) of the overall mean annual decline in pre-bronchodilator FEV1/height2, respectively. Corresponding estimates for pre-bronchodilator FVC/height2 were 42.1% (95% CI% 29.8% to 54.4%), 36.0% (23.7% to 48.2%) and 15.8% (2.6% to 28.9%) of the overall mean annual decline, respectively. CONCLUSION Urbanisation, living at high altitude and hypertension were associated with accelerated lung function decline in a population with low daily smoking prevalence.
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Affiliation(s)
- Catherine H Miele
- Division of Pulmonary and Critical Care, School of Medicine, Johns Hopkins University, Baltimore, USA
- Center for Global Non-Communicable Disease Research and Training, Johns Hopkins University, Baltimore, MD, USA
| | - Matthew R Grigsby
- Division of Pulmonary and Critical Care, School of Medicine, Johns Hopkins University, Baltimore, USA
- Center for Global Non-Communicable Disease Research and Training, Johns Hopkins University, Baltimore, MD, USA
| | - Trishul Siddharthan
- Division of Pulmonary and Critical Care, School of Medicine, Johns Hopkins University, Baltimore, USA
- Center for Global Non-Communicable Disease Research and Training, Johns Hopkins University, Baltimore, MD, USA
| | - Robert H Gilman
- Program in Global Disease Epidemiology and Control, Department of International Health, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, USA
| | - J Jaime Miranda
- CRONICAS Center of Excellence for Chronic Diseases, Universidad Peruana Cayetano Heredia, Lima, Peru
- Departamento de Medicina, Escuela de Medicina, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Antonio Bernabe-Ortiz
- CRONICAS Center of Excellence for Chronic Diseases, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Robert A Wise
- Division of Pulmonary and Critical Care, School of Medicine, Johns Hopkins University, Baltimore, USA
| | - William Checkley
- Division of Pulmonary and Critical Care, School of Medicine, Johns Hopkins University, Baltimore, USA
- Center for Global Non-Communicable Disease Research and Training, Johns Hopkins University, Baltimore, MD, USA
- Program in Global Disease Epidemiology and Control, Department of International Health, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, USA
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Pereira AA, Pollard SL, Locke R, Romero K, Lima JJ, Hansel NN, Checkley W. Association between exhaled carbon monoxide and asthma outcomes in Peruvian children. Respir Med 2018; 145:212-216. [PMID: 30509712 DOI: 10.1016/j.rmed.2018.11.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/01/2018] [Revised: 11/05/2018] [Accepted: 11/09/2018] [Indexed: 11/25/2022]
Abstract
BACKGROUND Asthma prevalence continues to increase in low and middle-income countries, presenting challenges in assessing asthma control in resource-poor settings. Previous studies suggest that exhaled carbon monoxide (eCO) is higher with asthma severity and lower with treatment. We hypothesized that eCO levels may be elevated in children with asthma, particularly in children with partially controlled or uncontrolled asthma in a low-resource setting in Lima, Peru. METHODS We compared average eCO levels between 248 children with asthma and 221 healthy controls as well as the odds of asthma by eCO quartiles (0-1, 2, 3, and ≥4 ppm) using multivariable linear and logistic regression. eCO quartiles were also used to compare the odds of partially controlled or uncontrolled asthma (score ≤19 on the Asthma Control Test) in a multivariable logistic regression model. FINDINGS Average adjusted eCO level was 0.56 ppm (95% CI 0.07-1.05) higher in children with asthma. The adjusted odds of asthma were 1.22 (95% CI 0.75-1.97), 1.46 (0.81-2.63), and 1.76 (0.96-3.23) in the second, third, and fourth eCO quartiles compared to the first eCO quartile, respectively. Among children with asthma, the adjusted odds of partially controlled or uncontrolled asthma in those in the second, third, and fourth eCO quartiles, compared to the first, were 1.61 (95% CI 0.74-3.48), 3.66 (95% CI 1.51-8.87), and 2.50 (95% CI 1.06-5.90), respectively. INTERPRETATION eCO may serve as an inexpensive biomarker for asthma control, particularly in low-resource settings.
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Affiliation(s)
- Amanda A Pereira
- Department of International Health, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, USA
| | - Suzanne L Pollard
- Department of International Health, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, USA; Division of Pulmonary and Critical Care, School of Medicine, Johns Hopkins University, Baltimore, USA
| | - Robert Locke
- Division of Pulmonary and Critical Care, School of Medicine, Johns Hopkins University, Baltimore, USA
| | - Karina Romero
- Division of Pulmonary and Critical Care, School of Medicine, Johns Hopkins University, Baltimore, USA
| | - John J Lima
- Center for Pharmacogenomics and Translational Research, Nemours Children's Health System, Jacksonville, USA
| | - Nadia N Hansel
- Division of Pulmonary and Critical Care, School of Medicine, Johns Hopkins University, Baltimore, USA
| | - William Checkley
- Department of International Health, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, USA; Division of Pulmonary and Critical Care, School of Medicine, Johns Hopkins University, Baltimore, USA; Biomedical Research Unit, A.B. PRISMA, Lima, Peru.
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Trompeter G, Grigsby MR, Miele CH, Wise RA, Gilman RH, Miranda JJ, Bernabe-Ortiz A, Checkley W. Patterns of Body Composition Relating to Chronic Respiratory Diseases Among Adults in Four Resource-Poor Settings in Peru. Lung 2018; 196:277-284. [PMID: 29556728 DOI: 10.1007/s00408-018-0109-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Accepted: 03/10/2018] [Indexed: 11/25/2022]
Abstract
PURPOSE Body composition is known to influence the development and progression of chronic respiratory diseases (CRDs). We sought to characterize the unique anthropometric phenotypes that present with asthma, chronic obstructive pulmonary disease (COPD), and chronic bronchitis across four distinct settings in Peru. METHODS We collected sociodemographic, clinical history, and spirometry data from 2959 participants from Lima, Tumbes, and rural and urban Puno. We compared the prevalence of CRDs among different study sites and described disease phenotypes. We used single and multivariable linear regression to model the influence of CRD status on various descriptors of body composition. RESULTS Overall prevalence of CRDs varied across sites with the highest prevalence of asthma in Lima (14.5%) and the highest prevalence of COPD in rural Puno (9.9%). Measures of body composition also varied across sites, with highest mean body mass index (BMI) in Lima (28.4 kg/m2) and the lowest mean BMI in rural Puno (25.2 kg/m2). Participants with COPD had the lowest mean fat mass index (FMI) (10.5 kg/m2) and waist circumference (88.3 cm), whereas participants with asthma had the highest mean FMI (14.5 kg/m2), and waist circumference (94.8 cm). In multivariable analysis, participants with COPD had a lower waist circumference (adjusted mean - 2.97 cm, 95% CI 4.62 to - 1.32 cm) when compared to non-CRD participants. CONCLUSIONS Our findings provide evidence that asthma and chronic bronchitis are more likely to be associated with obesity and higher fat mass, while COPD is associated with being underweight and having less lean mass.
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Affiliation(s)
- Grace Trompeter
- Division of Pulmonary and Critical Care, Johns Hopkins University School of Medicine, 1830 E. Monument St. Room 555, Baltimore, MD, 21287, USA
| | - Matthew R Grigsby
- Division of Pulmonary and Critical Care, Johns Hopkins University School of Medicine, 1830 E. Monument St. Room 555, Baltimore, MD, 21287, USA
| | - Catherine H Miele
- Division of Pulmonary and Critical Care, Johns Hopkins University School of Medicine, 1830 E. Monument St. Room 555, Baltimore, MD, 21287, USA
| | - Robert A Wise
- Division of Pulmonary and Critical Care, Johns Hopkins University School of Medicine, 1830 E. Monument St. Room 555, Baltimore, MD, 21287, USA
| | - Robert H Gilman
- Program in Global Disease Epidemiology and Control, Department of International Health, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, USA
| | - J Jaime Miranda
- CRONICAS Center of Excellence in Chronic Diseases, Universidad Peruana Cayetano Heredia, Lima, Peru
- Department of Medicine, School of Medicine, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Antonio Bernabe-Ortiz
- CRONICAS Center of Excellence in Chronic Diseases, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - William Checkley
- Division of Pulmonary and Critical Care, Johns Hopkins University School of Medicine, 1830 E. Monument St. Room 555, Baltimore, MD, 21287, USA.
- Program in Global Disease Epidemiology and Control, Department of International Health, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, USA.
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Morgan BW, Siddharthan T, Grigsby MR, Pollard SL, Kalyesubula R, Wise RA, Kirenga B, Checkley W. Asthma and Allergic Disorders in Uganda: A Population-Based Study Across Urban and Rural Settings. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY-IN PRACTICE 2018; 6:1580-1587.e2. [PMID: 29361510 DOI: 10.1016/j.jaip.2017.11.032] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 09/16/2017] [Revised: 11/02/2017] [Accepted: 11/20/2017] [Indexed: 02/08/2023]
Abstract
BACKGROUND Allergic diseases are increasing in sub-Saharan Africa, but few studies have characterized the burden among adults. OBJECTIVE We conducted a study to evaluate the prevalence and risk factors of allergic disorders in urban and rural Uganda. METHODS We present a cross-sectional analysis of enrollment data from a population-based cohort study of adults aged ≥35 years in urban and rural Uganda. Sociodemographic and both lifetime and 12-month respiratory symptoms data were collected and spirometry was conducted following standard guidelines. RESULTS In 1,308 adults (median age 43.8 years and 52.3% female), we found an age-adjusted prevalence of 6.8% for asthma (9.8% urban, 4.3% rural; P < .001), 11.9% for allergic rhinitis (16.4% urban, 7.8% rural; P < .001), and 8.2% for eczema (9.9% urban, 7.8% rural; P = .15). Urbanization was the primary driver of asthma, accounting for 61.4% of cases (95% confidence interval [CI] 22.0% to 83.4%), and was the strongest risk factor for any allergic illness (odds ratio [OR] = 1.87, 95% CI 1.39-2.51). Parental asthma was not associated with allergic illness. Asthma was associated with a lower forced expiratory volume in 1 second (FEV1) by 0.56 z scores (95% CI 0.33-0.80). We found a dose-response association between lower quintiles of the FEV1/forced vital capacity ratio and both hospitalization (OR = 1.77, 95% CI 1.21-2.59) and impairment in daily activities (1.65, 1.20-2.27). CONCLUSIONS Asthma and allergic rhinitis were twice as prevalent in urban settings. Asthma was associated with greater impairment and worse lung function outcomes. We identified a high prevalence of allergic disorders in Uganda, which can be expected to increase due to urbanization and resultant exposures throughout early development.
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Affiliation(s)
- Brooks W Morgan
- Division of Pulmonary and Critical Care, School of Medicine, Johns Hopkins University, Baltimore, Md
| | - Trishul Siddharthan
- Division of Pulmonary and Critical Care, School of Medicine, Johns Hopkins University, Baltimore, Md
| | - Matthew R Grigsby
- Division of Pulmonary and Critical Care, School of Medicine, Johns Hopkins University, Baltimore, Md
| | - Suzanne L Pollard
- Division of Pulmonary and Critical Care, School of Medicine, Johns Hopkins University, Baltimore, Md
| | - Robert Kalyesubula
- Department of Medicine and Lung Institute, College of Health Sciences, Makerere University, Kampala, Uganda
| | - Robert A Wise
- Division of Pulmonary and Critical Care, School of Medicine, Johns Hopkins University, Baltimore, Md
| | - Bruce Kirenga
- Department of Medicine and Lung Institute, College of Health Sciences, Makerere University, Kampala, Uganda
| | - William Checkley
- Division of Pulmonary and Critical Care, School of Medicine, Johns Hopkins University, Baltimore, Md; Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Md.
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Abstract
PURPOSE OF REVIEW The prevalence of asthma was thought to be low in most low-income countries, but several reports have indicated this is not always true. This is a narrative review of recent publications on the burden of asthma in low and middle-income countries (LMIC) and underprivileged communities from developed countries. RECENT FINDINGS Several studies have reported a low prevalence of asthma is LMIC, but indicate it is increasing. In the last few years, however, many surveys demonstrated this may not always be true. An analysis of the International Study for Asthma and Allergy in Childhood phase III database indicated although the prevalence of asthma among children and adolescents is higher in the developed countries, symptoms of asthma are often more severe in less affluent nations. The rate of uncontrolled asthma is also higher among underprivileged communities of developed countries. Secondary analysis of data generated by the WHO's world health survey performed among adults of 70 countries indicate symptoms of asthma are less frequent in middle-income countries and more frequent in the extremes, low income and high income. This sort of U shaped distribution suggests the disease (or syndrome) comprise more than one major phenotype related to diverse underlying mechanisms. In fact, recent reports show symptoms of asthma among the poor are associated with unhygienic living conditions, which may reduce the risk of atopy but increase the risk of nonatopic wheezing. Urbanization and exposure to air pollution also seem to contribute to an increasing prevalence severity of asthma in LMIC. Access to proper diagnosis and treatment with controller medications for asthma, specially with inhaled corticosteroids is feasible and cost-effective, reduce symptoms, health resource utilization, improves quality of life, and reduce mortality in low-resource settings. SUMMARY Prevalence of asthma was thought to be low in low-income countries, but several reports have indicated this is not always true. Under diagnosis, under treatment, exposure to air pollution, and unhygienic living conditions may contribute to a higher frequency and severity of symptoms of asthma among the poor. Proper diagnosis and treatment with controller medications for asthma is feasible and cost-effective in low-resource settings.
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Sood A, Assad NA, Barnes PJ, Churg A, Gordon SB, Harrod KS, Irshad H, Kurmi OP, Martin WJ, Meek P, Mortimer K, Noonan CW, Perez-Padilla R, Smith KR, Tesfaigzi Y, Ward T, Balmes J. ERS/ATS workshop report on respiratory health effects of household air pollution. Eur Respir J 2018; 51:51/1/1700698. [PMID: 29301918 DOI: 10.1183/13993003.00698-2017] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Accepted: 08/08/2017] [Indexed: 12/18/2022]
Abstract
Exposure to household air pollution (HAP) from solid fuel combustion affects almost half of the world population. Adverse respiratory outcomes such as respiratory infections, impaired lung growth and chronic obstructive pulmonary disease have been linked to HAP exposure. Solid fuel smoke is a heterogeneous mixture of various gases and particulates. Cell culture and animal studies with controlled exposure conditions and genetic homogeneity provide important insights into HAP mechanisms. Impaired bacterial phagocytosis in exposed human alveolar macrophages possibly mediates several HAP-related health effects. Lung pathological findings in HAP-exposed individuals demonstrate greater small airways fibrosis and less emphysema compared with cigarette smokers. Field studies using questionnaires, air pollution monitoring and/or biomarkers are needed to better establish human risks. Some, but not all, studies suggest that improving cookstove efficiency or venting emissions may be associated with reduced respiratory symptoms, lung function decline in women and severe pneumonia in children. Current studies focus on fuel switching, stove technology replacements or upgrades and air filter devices. Several governments have initiated major programmes to accelerate the upgrade from solid fuels to clean fuels, particularly liquid petroleum gas, which provides research opportunities for the respiratory health community.
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Affiliation(s)
- Akshay Sood
- University of New Mexico School of Medicine, Albuquerque, NM, USA
| | - Nour A Assad
- University of New Mexico School of Medicine, Albuquerque, NM, USA
| | - Peter J Barnes
- National Heart and Lung Institute, Imperial College London, London, UK
| | - Andrew Churg
- University of British Columbia, Vancouver, BC, Canada
| | | | - Kevin S Harrod
- University of Alabama at Birmingham, Birmingham, AL, USA
| | - Hammad Irshad
- Lovelace Respiratory Research Institute, Albuquerque, NM, USA
| | | | | | - Paula Meek
- University of Colorado at Denver, Denver, CO, USA
| | | | | | | | - Kirk R Smith
- University of California School of Public Health, Berkeley, CA, USA
| | | | - Tony Ward
- University of Montana, Missoula, MT, USA
| | - John Balmes
- University of California School of Public Health, Berkeley, CA, USA.,University of California, San Francisco, CA, USA
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Bedolla-Barajas M, Javier Ramírez-Cervantes F, Morales-Romero J, Jesús Pérez-Molina J, Meza-López C, Delgado-Figueroa N. A rural environment does not protect against asthma or other allergic diseases amongst Mexican children. Allergol Immunopathol (Madr) 2018; 46:31-38. [PMID: 28477854 DOI: 10.1016/j.aller.2017.01.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Accepted: 01/24/2017] [Indexed: 01/13/2023]
Abstract
INTRODUCTION The commonly held notion that a rural environment decreases the frequency of allergic diseases has proven to be inconsistent amongst children. OBJECTIVE Our objective was to contrast the prevalence of bronchial asthma (BA), allergic rhinitis (AR), and atopic dermatitis (AD) between children that live in a rural environment and those that live in urban areas. METHODS We carried out a cross-sectional study amongst children aged six to seven; they were selected through probabilistic, stratified and conglomerated sampling. The prevalence of BA, AR, and AD was identified with the use of the questionnaire provided by The International Study of Asthma and Allergies in Childhood, additionally, we inquired about each child's family history of atopy, their exposure to farm animals, the intake of unpasteurised cow's milk, and the number of siblings related to every child. We used logistic regression and multivariate analysis to determine the correlation between asthma, allergic diseases, and rural environment. RESULTS We included 189/1003 (18.8%) children from a rural environment, and 814/1003 (81.2%) from an urban area. BA and AR were associated to a family history of atopy (OR=2.15, p=0.001; OR=2.58, p=0.002, respectively). BA was more prevalent in males (OR=1.92, p=0.007). Notably, a higher number of siblings seems to protect against AR (OR=0.45, p=0.008). A paternal history of allergies was associated to AD. CONCLUSIONS In our study, we were unable to find protective factors in a rural environment that might decrease the prevalence of asthma or allergic diseases.
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Banerjee D, Gelaye B, Zhong QY, Sanchez SE, Williams MA. Childhood abuse and adult-onset asthma among Peruvian women. J Asthma 2017. [PMID: 28650748 DOI: 10.1080/02770903.2017.1339243] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
OBJECTIVE Childhood abuse has been found to be associated with adult-onset asthma; however, this association has not been studied in low- and middle-income countries with a high burden of gender-based violence, including childhood abuse. We examined the odds of asthma diagnosed at age 18 or older in relation to history of physical and sexual abuse among Peruvian pregnant women. METHODS This cross-sectional study collected demographic characteristics, history of abuse and asthma diagnoses from 3081 pregnant women. Logistic regression procedures estimated adjusted odds ratios and 95% confidence intervals (aOR, [95% CI]) for asthma diagnoses in relation to abuse. RESULTS Overall, 71% of the women reported a history of abuse (<18 years), and asthma was diagnosed among 2.6% of the cohort participants. The prevalence of physical only, sexual only and both physical and sexual childhood abuse was 38, 8 and 25%, respectively. The history of physical only (1.16, [0.63-2.17]), sexual only (2.11, [0.92-4.84]) or both physical and sexual childhood abuse (1.75, [0.94-3.29]) was positively associated with increased odds of asthma, although the associations were not statistically significant in the multivariate analysis. However, the odds of asthma increased with increasing numbers of abuse events (ptrend = 0.01). Women who reported ≥3 abuse events had an increased odds of asthma (1.88, [1.06-3.34]). CONCLUSION Our results do not provide convincing evidence that childhood abuse is associated with asthma among pregnant Peruvian women; however, we were able to demonstrate that an increased number of abuse events are associated with asthma. Further research is required to better understand the effects of abuse on asthma.
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Affiliation(s)
- Dipti Banerjee
- a Department of Epidemiology , Harvard T.H. Chan School of Public Health , Boston , MA , USA
| | - Bizu Gelaye
- a Department of Epidemiology , Harvard T.H. Chan School of Public Health , Boston , MA , USA
| | - Qiu-Yue Zhong
- a Department of Epidemiology , Harvard T.H. Chan School of Public Health , Boston , MA , USA
| | - Sixto E Sanchez
- b Asociación Civil PROESA , Lima , Peru.,c Universidad Peruana de Ciencias Aplicados , Lima , Peru
| | - Michelle A Williams
- a Department of Epidemiology , Harvard T.H. Chan School of Public Health , Boston , MA , USA
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Hooper LG, Dieye Y, Ndiaye A, Diallo A, Fan VS, Neuzil KM, Ortiz JR. Estimating pediatric asthma prevalence in rural senegal: A cross-sectional survey. Pediatr Pulmonol 2017; 52:303-309. [PMID: 27551858 DOI: 10.1002/ppul.23545] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Revised: 07/12/2016] [Accepted: 07/22/2016] [Indexed: 12/13/2022]
Abstract
RATIONALE In Senegal, the prevalence of childhood asthma and utilization of appropriate asthma therapies is unknown. METHODOLOGY We used the International Study of Asthma and Allergies in Childhood (ISAAC) survey instrument to assess childhood respiratory health in rural Senegal. We interviewed the caregivers of children aged 5 through 8 years of age in the four largest Niakhar villages in August 2012. RESULTS We interviewed 1,103 primary caregivers for 1,513 children, representing 91% of all age-eligible children in the study area. Overall, 206 (14%) children had wheeze at any time in the past, 130 (9%) had wheeze within the past year, and only 41 (3%) reported a clinical diagnosis of asthma. Among children with wheeze within the past year, 81 (62%) had symptoms of severe asthma. Nocturnal cough was reported in 186 (14%) children who denied any history of wheezing illness. Only four (3%) children with wheeze in the past year had ever received bronchodilator therapy. Children with wheeze in the past year were significantly more likely to seek medical care for respiratory symptoms and to be perceived as less healthy than their peers. Children of lower socioeconomic status were significantly more likely to have wheeze. CONCLUSIONS Nearly one in ten children in Niakhar, Senegal had symptoms suggestive of asthma; however, few children have a diagnosis of asthma or use appropriate therapies. This study highlights an opportunity to raise community awareness of asthma in rural Senegal and to increase access to appropriate medical therapies. Pediatr Pulmonol. 2017;52:303-309. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Laura G Hooper
- Department of Medicine, University of Washington, Seattle, Washington
| | | | - Assane Ndiaye
- Institute de Recherche pour le Developpement, Dakar, Senegal
| | - Aldiouma Diallo
- Institute de Recherche pour le Developpement, Dakar, Senegal
| | - Vincent S Fan
- Department of Medicine, University of Washington, Seattle, Washington.,VA Puget Sound Health Care System, Seattle, Washington
| | - Kathleen M Neuzil
- Department of Medicine, University of Washington, Seattle, Washington.,Department of Global Health, University of Washington, Seattle, Washington.,PATH, Seattle, Washington
| | - Justin R Ortiz
- Department of Medicine, University of Washington, Seattle, Washington.,Department of Global Health, University of Washington, Seattle, Washington.,PATH, Seattle, Washington
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Pham LV, Meinzen C, Arias RS, Schwartz NG, Rattner A, Miele CH, Smith PL, Schneider H, Miranda JJ, Gilman RH, Polotsky VY, Checkley W, Schwartz AR. Cross-Sectional Comparison of Sleep-Disordered Breathing in Native Peruvian Highlanders and Lowlanders. High Alt Med Biol 2017; 18:11-19. [PMID: 28306414 PMCID: PMC5361758 DOI: 10.1089/ham.2016.0102] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Accepted: 01/01/2017] [Indexed: 12/16/2022] Open
Abstract
Pham, Luu V., Christopher Meinzen, Rafael S. Arias, Noah G. Schwartz, Adi Rattner, Catherine H. Miele, Philip L. Smith, Hartmut Schneider, J. Jaime Miranda, Robert H. Gilman, Vsevolod Y. Polotsky, William Checkley, and Alan R. Schwartz. Cross-sectional comparison of sleep-disordered breathing in native Peruvian highlanders and lowlanders. High Alt Med Biol. 18:11-19, 2017. BACKGROUND Altitude can accentuate sleep disordered breathing (SDB), which has been linked to cardiovascular and metabolic diseases. SDB in highlanders has not been characterized in large controlled studies. The purpose of this study was to compare SDB prevalence and severity in highlanders and lowlanders. METHODS 170 age-, body-mass-index- (BMI), and sex-matched pairs (age 58.2 ± 12.4 years, BMI 27.2 ± 3.5 kg/m2, and 86 men and 84 women) of the CRONICAS Cohort Study were recruited at a sea-level (Lima) and a high-altitude (Puno, 3825 m) setting in Peru. Participants underwent simultaneous nocturnal polygraphy and actigraphy to characterize breathing patterns, movement arousals, and sleep/wake state. We compared SDB prevalence, type, and severity between highlanders and lowlanders as measured by apnea-hypopnea index (AHI) and pulse oximetry (SPO2) during sleep. RESULTS Sleep apnea prevalence was greater in highlanders than in lowlanders (77% vs. 54%, p < 0.001). Compared with lowlanders, highlanders had twofold elevations in AHI due to increases in central rather than obstructive apneas. In highlanders compared with lowlanders, SPO2 was lower during wakefulness and decreased further during sleep (p < 0.001). Hypoxemia during wakefulness predicted sleep apnea in highlanders, and it appears to mediate the effects of altitude on sleep apnea prevalence. Surprisingly, hypoxemia was also quite prevalent in lowlanders, and it was also associated with increased odds of sleep apnea. CONCLUSIONS High altitude and hypoxemia at both high and low altitude were associated with increased SDB prevalence and severity. Our findings suggest that a large proportion of highlanders remain at risk for SDB sequelae.
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Affiliation(s)
- Luu V. Pham
- Division of Pulmonary and Critical Care and Sleep Medicine, Department of Medicine, School of Medicine, Johns Hopkins University, Baltimore, Maryland
| | - Christopher Meinzen
- Program in Global Disease Epidemiology and Control, Department of International Health, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland
| | - Rafael S. Arias
- School of Medicine, Johns Hopkins University, Baltimore, Maryland
| | - Noah G. Schwartz
- University of Chicago Pritzker School of Medicine, Chicago, Illinois
| | - Adi Rattner
- School of Medicine, Johns Hopkins University, Baltimore, Maryland
| | - Catherine H. Miele
- Division of Pulmonary and Critical Care and Sleep Medicine, Department of Medicine, School of Medicine, Johns Hopkins University, Baltimore, Maryland
| | - Philip L. Smith
- Division of Pulmonary and Critical Care and Sleep Medicine, Department of Medicine, School of Medicine, Johns Hopkins University, Baltimore, Maryland
| | - Hartmut Schneider
- Division of Pulmonary and Critical Care and Sleep Medicine, Department of Medicine, School of Medicine, Johns Hopkins University, Baltimore, Maryland
| | - J. Jaime Miranda
- School of Medicine, Universidad Peruana Cayetano Heredia, Lima, Peru
- CRONICAS Center of Excellence in Chronic Diseases, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Robert H. Gilman
- Program in Global Disease Epidemiology and Control, Department of International Health, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland
| | - Vsevolod Y. Polotsky
- Division of Pulmonary and Critical Care and Sleep Medicine, Department of Medicine, School of Medicine, Johns Hopkins University, Baltimore, Maryland
| | - William Checkley
- Division of Pulmonary and Critical Care and Sleep Medicine, Department of Medicine, School of Medicine, Johns Hopkins University, Baltimore, Maryland
- Program in Global Disease Epidemiology and Control, Department of International Health, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland
| | - Alan R. Schwartz
- Division of Pulmonary and Critical Care and Sleep Medicine, Department of Medicine, School of Medicine, Johns Hopkins University, Baltimore, Maryland
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Luo J, Liu D, Chen G, Liang B, Liu C. Clinical Roles of Lung Volumes Detected by Body Plethysmography and Helium Dilution in Asthmatic Patients: A Correlation and Diagnosis Analysis. Sci Rep 2017; 7:40870. [PMID: 28098214 PMCID: PMC5241662 DOI: 10.1038/srep40870] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Accepted: 12/13/2016] [Indexed: 02/05/2023] Open
Abstract
Roles of lung volumes in asthma remain controversial. We aimed to evaluate the efficacy of lung volumes in differentiating asthma severity levels. Consecutive outpatients with chronic persistent asthma were enrolled, and body plethysmography (BP) and helium dilution (HD) were performed simultaneously to extract RV%pred, TLC%pred, and RV/TLC. Significant negative correlations were found between FEV1%pred and RV%pred (r = -0.557, P < 0.001), TLC%pred (r = -0.387, P < 0.001), and RV/TLC (r = -0.485, P < 0.001) measured by BP, as well as difference in volumes between these two techniques (ΔRV%pred, ΔTLC%pred and ΔRV/TLC). In mild and moderate asthma, AUC of RV%pred detected by BP and ΔTLC%pred was 0.723 (95%CI 0.571-0.874, P = 0.005) and 0.739 (95%CI 0.607-0.872, P = 0.002) with sensitivity and specificity being 79.41% and 88.24%, and 65.22% and 56.52% at cut-off of 145.40% and 14.23%, respectively. In moderate and severe asthma, AUC of RV%pred detected by BP and ΔTLC%pred was 0.782 (95%CI 0.671-0.893, P < 0.001) and 0.788 (95%CI 0.681-0.894, P < 0.002) with sensitivity and specificity being 77.78% and 97.22%, and 73.53% and 52.94% at cut-off of 179.85% and 20.22%, respectively. In conclusion, lung volumes are reliable complement of FEV1 in identifying asthma severity levels.
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Affiliation(s)
- Jian Luo
- Department of Respiratory Diseases, West China School of Medicine and West China Hospital, Sichuan University, Chengdu, China
| | - Dan Liu
- Department of Critical Care Medicine, West China School of Medicine and West China Hospital, Sichuan University, Chengdu, China
| | - Guo Chen
- Department of Gerontology, Sichuan Academy of Medical Sciences and Sichuan Provincial People's Hospital, Chengdu, China
| | - Binmiao Liang
- Department of Respiratory Diseases, West China School of Medicine and West China Hospital, Sichuan University, Chengdu, China
| | - Chuntao Liu
- Department of Respiratory Diseases, West China School of Medicine and West China Hospital, Sichuan University, Chengdu, China
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Short-Term Fluctuations in Air Pollution and Asthma in Scania, Sweden. Is the Association Modified by Long-Term Concentrations? PLoS One 2016; 11:e0166614. [PMID: 27861543 PMCID: PMC5115756 DOI: 10.1371/journal.pone.0166614] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Accepted: 11/01/2016] [Indexed: 11/19/2022] Open
Abstract
Background and aims Asthma is one of the most common respiratory diseases in the world. Research has shown that temporal increases in air pollution concentrations can aggravate asthma symptoms. The aim of this study was to assess whether individuals living in areas with higher air pollution concentrations responded differently to short-term temporal exposure to air pollution than those living in lower air pollution areas. Method The study was designed as a case-crossover study in Scania, Sweden. Outcome data was visits to primary health care clinics with asthma as the main complaint during the years 2007 to 2010. Nitrogen dioxide levels were obtained from 21 different air pollution monitoring stations. Short-term exposure was defined as the average concentration four days prior to the visit. Data was pooled for areas above and below a two-year average NO2 concentration of 10 μg/m3, dispersion modelled with an emission database. Results The short-term association between NO2 and asthma visits seemed stronger in areas with NO2 levels below 10 μg/m3, with an odds ratio (OR) of 1.15 (95% confidence interval (CI): 1.08–1.23) associated with a 10 μg/m3 increase in NO2 compared to areas above 10 μg/m3 NO2 levels, where corresponding OR of 1.09 (95% CI: 1.02–1.17). However, this difference was not statistically significant. (p = 0.13) Conclusions The study provided some evidence, although not statistically significant, that short-term associations between air pollution and asthma may depend on background air pollution levels. However, we cannot rule out that the association is due to other spatially dependent factors in Scania. The study should be reproduced in other study areas.
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Checkley W, Pollard SL, Siddharthan T, Babu GR, Thakur M, Miele CH, Van Schayck OC. Managing threats to respiratory health in urban slums. THE LANCET RESPIRATORY MEDICINE 2016; 4:852-854. [PMID: 27760724 DOI: 10.1016/s2213-2600(16)30245-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Revised: 07/20/2016] [Accepted: 08/09/2016] [Indexed: 11/29/2022]
Affiliation(s)
- William Checkley
- Division of Pulmonary and Critical Care, School of Medicine, Johns Hopkins University, Baltimore, MD 21287, USA.
| | - Suzanne L Pollard
- Division of Pulmonary and Critical Care, School of Medicine, Johns Hopkins University, Baltimore, MD 21287, USA
| | - Trishul Siddharthan
- Division of Pulmonary and Critical Care, School of Medicine, Johns Hopkins University, Baltimore, MD 21287, USA
| | - Giridhara R Babu
- Public Health Foundation of India, Indian Institute of Public Health-Hyderabad, Bangalore campus, Bangalore, India
| | - Megha Thakur
- Public Health Foundation of India, Indian Institute of Public Health-Hyderabad, Bangalore campus, Bangalore, India
| | - Catherine H Miele
- Division of Pulmonary and Critical Care, School of Medicine, Johns Hopkins University, Baltimore, MD 21287, USA
| | - Onno Cp Van Schayck
- Department of Family Medicine, CAPHRI, Maastricht University, Maastricht, Netherlands
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Radon K, Llanqui U, Arce A, Herrera R, Herbig B, Nowak D, Parra M. Job strain, bullying and violence at work and asthma in Peruvian cleaners-a cross-sectional analysis. J Asthma 2016; 53:1018-25. [PMID: 27437609 DOI: 10.1080/02770903.2016.1180698] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
OBJECTIVES An increased asthma prevalence was found in cleaners. Many of them work in precarious employment conditions, potentially leading to stress, a known risk factor for asthma. We aimed to analyze whether asthma in cleaners might partly be explained by psychosocial working conditions. METHODS The study population of this cross-sectional study included 199 cleaners employed at regional public health services in Puno Province (Peru). They were compared to 79 unexposed workers from Lima, Peru (response 83%). Both groups answered the short version of the European Working Condition Survey and a modified version of the European Community Respiratory Health screening questionnaire. After multiple imputation, the association between psychosocial working conditions and asthma (wheeze without cold or use of asthma medication) was assessed. RESULTS The 12-months prevalence of asthma was 22% among cleaners versus 5% among unexposed workers (pChi(2) = .001). Cleaners were more likely than unexposed workers to work with temporary or sub-contracts, have a high employment insecurity, high strain working conditions and low social support (all pChi(2) < .05). Twenty-six percent vs. 10% reported a high bullying score; 39% vs. 8% had experienced violence at work (both pChi(2) < .001). High bullying score (adjusted Odds Ratio 5.6; 95% Confidence Interval 1.5-21.4) and violence (2.4; 1.1-5.4) were the main predictors of asthma. Taking these factors into account, being a cleaner was not statistically significantly associated with the outcome (3.5; 0.9-13.8). CONCLUSIONS Poor psychosocial working conditions of cleaners may partly explain the high prevalence of asthma. The underlying mechanism might be a stress-induced inflammatory immune response.
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Affiliation(s)
- Katja Radon
- a Center for International Health at the Institute and Outpatient Clinic for Occupational, Social and Environmental Medicine, University Hospital Munich (LMU), Member of DZL, German Centre for Lung Research , Munich , Germany
| | - Uriel Llanqui
- b Social Health Insurance , Care Net Puno, Center for Prevention of Work-related Risks , Puno , Perú
| | - Andrés Arce
- c Cardioclinic , Occupational and Preventive Health Center , San Borja, Lima , Perú
| | - Ronald Herrera
- a Center for International Health at the Institute and Outpatient Clinic for Occupational, Social and Environmental Medicine, University Hospital Munich (LMU), Member of DZL, German Centre for Lung Research , Munich , Germany
| | - Britta Herbig
- d Research Unit Applied Medicine and Psychology at Work , Institute and Outpatient Clinic for Occupational, Social and Environmental Medicine, University Hospital Munich (LMU) , Munich , Germany
| | - Dennis Nowak
- a Center for International Health at the Institute and Outpatient Clinic for Occupational, Social and Environmental Medicine, University Hospital Munich (LMU), Member of DZL, German Centre for Lung Research , Munich , Germany
| | - Manuel Parra
- a Center for International Health at the Institute and Outpatient Clinic for Occupational, Social and Environmental Medicine, University Hospital Munich (LMU), Member of DZL, German Centre for Lung Research , Munich , Germany.,e Consultant in Occupational Health and Health Promotion , Providencia, Santiago , Chile
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