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Makrufardi F, Triasih R, Nurnaningsih N, Chung KF, Lin SC, Chuang HC. Extreme temperatures increase the risk of pediatric pneumonia: a systematic review and meta-analysis. Front Pediatr 2024; 12:1329918. [PMID: 38370139 PMCID: PMC10869493 DOI: 10.3389/fped.2024.1329918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Accepted: 01/22/2024] [Indexed: 02/20/2024] Open
Abstract
Introduction The impact of climate change on ambient temperatures threatens to worsen pediatric pneumonia-related outcomes considerably. This study examined the associations of temperature variation and extreme temperature with pediatric pneumonia-related events using a meta-analysis. Methods We systematically searched PubMed, Medline, Embase, and Web of Science databases for relevant literature, and the quality of evidence was assessed. Fixed and random-effects meta-analyses were performed to calculate the pooled relative risks (RRs) of the associations with pneumonia-related events. Results We observed that a 1°C temperature variation increased the RR of pneumonia events by 1.06-fold (95% confidence interval (CI): 1.03-1.10). A 1°C temperature variation increased the RR by 1.10-fold of the pediatric pneumonia hospital admissions (95% CI: 1.00-1.21) and 1.06-fold of the pediatric pneumonia emergency department visits (95% CI: 1.01-1.10). Extreme cold increased the RR by 1.25-fold of the pediatric pneumonia events (95% CI: 1.07-1.45). A 1°C temperature variation increased the RR of pneumonia events in children by 1.19-fold (95% CI: 1.08-1.32), girls by 1.03-fold (95% CI: 1.02-1.05), and in temperate climate zones by 1.07-fold (95% CI: 1.03-1.11). Moreover, an increase in extreme cold increased the RR of pneumonia events in children by 2.43-fold (95% CI: 1.72-3.43), girls by 1.96-fold (95% CI: 1.29-2.98) and in temperate climate zones by 2.76-fold (95% CI: 1.71-4.47). Conclusion Our study demonstrated that pediatric pneumonia events are more prevalent among children, particularly girls, and individuals residing in temperate climate zones. Climate change represents an emergent public health threat, affecting pediatric pneumonia treatment and prevention.. Systematic Review Registration PROSPERO (CRD42022378610).
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Affiliation(s)
- Firdian Makrufardi
- International Ph.D. Program in Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
- Department of Child Health, Faculty of Medicine, Public Health, and Nursing, Universitas Gadjah Mada—Dr. Sardjito Hospital, Yogyakarta, Indonesia
| | - Rina Triasih
- Department of Child Health, Faculty of Medicine, Public Health, and Nursing, Universitas Gadjah Mada—Dr. Sardjito Hospital, Yogyakarta, Indonesia
| | - Nurnaningsih Nurnaningsih
- Department of Child Health, Faculty of Medicine, Public Health, and Nursing, Universitas Gadjah Mada—Dr. Sardjito Hospital, Yogyakarta, Indonesia
| | - Kian Fan Chung
- National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Sheng-Chieh Lin
- Department of Pediatrics, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
- Division of Allergy, Asthma, and Immunology, Department of Pediatrics, Shuang Ho Hospital, Taipei Medical University, New Taipei City, Taiwan
| | - Hsiao-Chi Chuang
- National Heart and Lung Institute, Imperial College London, London, United Kingdom
- School of Respiratory Therapy, College of Medicine, Taipei Medical University, Taipei, Taiwan
- Division of Pulmonary Medicine, Department of Internal Medicine, Shuang Ho Hospital, Taipei Medical University, New Taipei City, Taiwan
- Cell Physiology and Molecular Image Research Center, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, Taiwan
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Xin X, Hu X, Zhai L, Jia J, Pan B, Han Y, Jiang F. The effect of ambient temperature on hand, foot and mouth disease in Qingdao, China, 2014-2018. INTERNATIONAL JOURNAL OF ENVIRONMENTAL HEALTH RESEARCH 2023; 33:1081-1090. [PMID: 35510292 DOI: 10.1080/09603123.2022.2072818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Accepted: 04/27/2022] [Indexed: 06/14/2023]
Abstract
Hand, foot, and mouth disease (HFMD) is a kind of infection gastrointestinal disease. The present study aims to explore the association between ambient temperature and HFMD in Qingdao. A distributed lag nonlinear model with Poisson distribution was adopted to explore the effects of daily mean temperature on HFMD incidence. Our results found that the high temperature had acute and short-term effects and then declined rapidly along the lag days, with the maximum risk occurring 0 day of exposure. Compared with low temperature, higher effects were observed for high-temperature exposure. Overall, we found that the association between temperature and HFMD incidence was non-linear, exhibiting an approximate "J" shape, with peak value occurring at 30.5℃ (RR = 2.208, 95% CI: 1.995-2.444). Our findings suggest that ambient temperature is significantly associated with the incidence of HFMD in Qingdao. Monitoring ambient temperature changes is an appropriate recommendation to prevent HFMD.
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Affiliation(s)
- Xueling Xin
- Department of Acute Infectious Diseases, Qingdao Municipal Centre of Disease Control and Prevention, Qingdao Institute of Prevention Medicine, Qingdao City, Shandong Province, People's Republic of China
| | - Xiaowen Hu
- Department of Acute Infectious Diseases, Qingdao Municipal Centre of Disease Control and Prevention, Qingdao Institute of Prevention Medicine, Qingdao City, Shandong Province, People's Republic of China
| | - Long Zhai
- Department of Occupational Health, Qingdao Municipal Center for Disease Control and Prevention, Qingdao Institute of Prevention Medicine, Qingdao City, Shandong Province, People's Republic of China
| | - Jing Jia
- Department of Acute Infectious Diseases, Qingdao Municipal Centre of Disease Control and Prevention, Qingdao Institute of Prevention Medicine, Qingdao City, Shandong Province, People's Republic of China
| | - Bei Pan
- Department of Acute Infectious Diseases, Qingdao Municipal Centre of Disease Control and Prevention, Qingdao Institute of Prevention Medicine, Qingdao City, Shandong Province, People's Republic of China
| | - Yalin Han
- Department of Acute Infectious Diseases, Qingdao Municipal Centre of Disease Control and Prevention, Qingdao Institute of Prevention Medicine, Qingdao City, Shandong Province, People's Republic of China
| | - Fachun Jiang
- Department of Acute Infectious Diseases, Qingdao Municipal Centre of Disease Control and Prevention, Qingdao Institute of Prevention Medicine, Qingdao City, Shandong Province, People's Republic of China
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Wu Y, Liang M, Liang Q, Yang X, Sun Y. A distributed lag non-linear time-series study of ambient temperature and healthcare-associated infections in Hefei, China. INTERNATIONAL JOURNAL OF ENVIRONMENTAL HEALTH RESEARCH 2023; 33:258-267. [PMID: 34915779 DOI: 10.1080/09603123.2021.2017862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Accepted: 12/08/2021] [Indexed: 06/14/2023]
Abstract
Little is known about the effects of temperature on healthcare-associated infections (HAIs). A distributed lag non-linear model was used to estimate the association between ambient temperature and HAIs in Hefei, China. In total, 9,592 HAIs were included. The effect of low temperature (-0.1°C, 2.5th percentile) was significant on the current day (RR = 1.108, 95%CI:1.003-1.222), and then appeared on the 4th day (RR = 1.045, 95%CI:1.007-1.084) and the 5th day (RR = 1.033, 95%CI:1.006-1.061). The cumulative lag effects of low temperature lasted from the 5th to 10th days (RR = 1.123-1.143), and a long-term cumulative lag effect was observed on the 14th day (RR = 1.157, 95%CI:1.001-1.338). The lag effect of high temperature (31.0°C, 97.5th percentile) was not statistically significant. However, the effects of temperatures on HAIs were not significant among gender or age subgroups. This study suggests that the low temperatures have acute and lag effects on HAIs in Hefei, China.
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Affiliation(s)
- Yile Wu
- Department of Hospital Infection Prevention and Control, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Mingming Liang
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, Anhui, China
| | - Qiwei Liang
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, Anhui, China
- Department of Hospital infection Prevention and Control, Children's Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Xiyao Yang
- Department of Hospital Infection Prevention and Control, The Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Yehuan Sun
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, Anhui, China
- Center for Evidence-Based Practice, Anhui Medical University, Hefei, Anhui, China
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4
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Psistaki K, Dokas IM, Paschalidou AK. The Impact of Ambient Temperature on Cardiorespiratory Mortality in Northern Greece. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 20:555. [PMID: 36612877 PMCID: PMC9819162 DOI: 10.3390/ijerph20010555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 12/22/2022] [Accepted: 12/23/2022] [Indexed: 06/17/2023]
Abstract
It is well-established that exposure to non-optimum temperatures adversely affects public health, with the negative impact varying with latitude, as well as various climatic and population characteristics. This work aims to assess the relationship between ambient temperature and mortality from cardiorespiratory diseases in Eastern Macedonia and Thrace, in Northern Greece. For this, a standard time-series over-dispersed Poisson regression was fit, along with a distributed lag nonlinear model (DLNM), using a maximum lag of 21 days, to capture the non-linear and delayed temperature-related effects. A U-shaped relationship was found between temperature and cardiorespiratory mortality for the overall population and various subgroups and the minimum mortality temperature was observed around the 65th percentile of the temperature distribution. Exposure to extremely high temperatures was found to put the highest risk of cardiorespiratory mortality in all cases, except for females which were found to be more sensitive to extreme cold. It is remarkable that the highest burden of temperature-related mortality was attributed to moderate temperatures and primarily to moderate cold. The elderly were found to be particularly susceptible to both cold and hot thermal stress. These results provide new evidence on the health response of the population to low and high temperatures and could be useful to local authorities and policy-makers for developing interventions and prevention strategies for reducing the adverse impact of ambient temperature.
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Affiliation(s)
- Kyriaki Psistaki
- Department of Forestry and Management of the Environment and Natural Resources, Democritus University of Thrace, 68200 Orestiada, Greece
| | - Ioannis M. Dokas
- Department of Civil Engineering, Democritus University of Thrace, 67100 Xanthi, Greece
| | - Anastasia K. Paschalidou
- Department of Forestry and Management of the Environment and Natural Resources, Democritus University of Thrace, 68200 Orestiada, Greece
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Alsaiqali M, De Troeyer K, Casas L, Hamdi R, Faes C, Van Pottelbergh G. The Effects of Heatwaves on Human Morbidity in Primary Care Settings: A Case-Crossover Study. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:832. [PMID: 35055653 PMCID: PMC8775418 DOI: 10.3390/ijerph19020832] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Revised: 01/03/2022] [Accepted: 01/06/2022] [Indexed: 02/04/2023]
Abstract
PURPOSE This study assesses the potential acute effects of heatwaves on human morbidities in primary care settings. METHODS We performed a time-stratified case-crossover study to assess the acute effects of heatwaves on selected morbidities in primary care settings in Flanders, Belgium, between 2000 and 2015. We used conditional logistic regression models. We assessed the effect of heatwaves on the day of the event (lag 0) and X days earlier (lags 1 to X). The associations are presented as Incidence Density Ratios (IDR). RESULTS We included 22,344 events. Heatwaves are associated with increased heat-related morbidities such as heat stroke IDR 3.93 [2.94-5.26] at lag 0, dehydration IDR 3.93 [2.94-5.26] at lag 1, and orthostatic hypotension IDR 2.06 [1.37-3.10] at lag 1. For cardiovascular morbidities studied, there was only an increased risk of stroke at lag 3 IDR 1.45 [1.04-2.03]. There is no significant association with myocardial ischemia/infarction or arrhythmia. Heatwaves are associated with decreased respiratory infection risk. The IDR for upper respiratory infections is 0.82 [0.78-0.87] lag 1 and lower respiratory infections (LRI) is 0.82 [0.74-0.91] at lag 1. There was no significant effect modification by age or premorbid chronic disease (diabetes, hypertesnsion). CONCLUSION Heatwaves are associated with increased heat-related morbidities and decreased respiratory infection risk. The study of heatwaves' effects in primary care settings helps evaluate the impact of heatwaves on the general population. Primary care settings might be not suitable to study acute life-threatening morbidities.
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Affiliation(s)
- Mahmoud Alsaiqali
- Epidemiology and Social Medicine (ESOC), University of Antwerp, 2610 Antwerp, Belgium;
| | - Katrien De Troeyer
- Department of Public Health and Primary Care, KU Leuven, 3000 Leuven, Belgium; (K.D.T.); (G.V.P.)
| | - Lidia Casas
- Epidemiology and Social Medicine (ESOC), University of Antwerp, 2610 Antwerp, Belgium;
| | - Rafiq Hamdi
- Royal Meteorological Institute of Belgium, B-1180 Brussels, Belgium;
| | - Christel Faes
- Data Science Institute (DSI), I-BioStat, Hasselt University, BE-3500 Hasselt, Belgium;
| | - Gijs Van Pottelbergh
- Department of Public Health and Primary Care, KU Leuven, 3000 Leuven, Belgium; (K.D.T.); (G.V.P.)
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Yu W, Xu R, Ye T, Han C, Chen Z, Song J, Li S, Guo Y. Temperature-mortality association during and before the COVID-19 pandemic in Italy: A nationwide time-stratified case-crossover study. URBAN CLIMATE 2021; 39:100948. [PMID: 34580627 PMCID: PMC8459163 DOI: 10.1016/j.uclim.2021.100948] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 06/25/2021] [Accepted: 08/03/2021] [Indexed: 06/13/2023]
Abstract
OBJECTIVES To identify the associations of temperature with non-COVID-19 mortality and all-cause mortality in the pandemic 2020 in comparison with the non-COVID-19 period in Italy. METHODS The data on 3,189,790 all-cause deaths (including 3,134,137 non-COVID-19 deaths) and meteorological conditions in 107 Italian provinces between February 1st and November 30th in each year of 2015-2020 were collected. We employed a time-stratified case-crossover study design combined with the distributed lag non-linear model to investigate the relationships of temperature with all-cause and non-COVID-19 mortality in the pandemic and non-pandemic periods. RESULTS Cold temperature exposure contributed higher risks for both all-cause and non-COVID-19 mortality in the pandemic period in 2020 than in 2015-2019. However, no different change was found for the impacts of heat. The relative risk (RR) of non-COVID-19 deaths and all-cause mortality at extremely cold (2 °C) in comparison with the estimated minimum mortality temperature (19 °C) in 2020 were 1.63 (95% CI: 1.55-1.72) and 1.45 (95%CI: 1.31-1.61) respectively, which were higher than all-cause mortality risk in 2015-2019 with RR of 1.19 (95%CI: 1.17-1.21). CONCLUSION Cold exposure indicated stronger impacts than high temperatures on all-cause and non-COVID-19 mortality in the pandemic year 2020 compared to its counterpart period in 2015-2019 in Italy.
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Affiliation(s)
- Wenhua Yu
- Climate, Air Quality Research Unit, School of Public Health and Preventive Medicine, Monash University, Level 2, 553 St Kilda Road, Melbourne, VIC 3004, Australia
| | - Rongbin Xu
- Climate, Air Quality Research Unit, School of Public Health and Preventive Medicine, Monash University, Level 2, 553 St Kilda Road, Melbourne, VIC 3004, Australia
| | - Tingting Ye
- Climate, Air Quality Research Unit, School of Public Health and Preventive Medicine, Monash University, Level 2, 553 St Kilda Road, Melbourne, VIC 3004, Australia
| | - Chunlei Han
- School of Public Health and Management, Binzhou Medical University, 346 Guanhai Road, Yantai 264003, PR China
| | - Zhuying Chen
- Department of Biomedical Engineering, The University of Melbourne, 203 Bouverie Street, Melbourne, VIC 3053, Australia
| | - Jiangning Song
- Monash Biomedicine Discovery Institute, Department of Biochemistry and Molecular Biology, Monash University, Melbourne, VIC 3800, Australia
| | - Shanshan Li
- Climate, Air Quality Research Unit, School of Public Health and Preventive Medicine, Monash University, Level 2, 553 St Kilda Road, Melbourne, VIC 3004, Australia
| | - Yuming Guo
- Climate, Air Quality Research Unit, School of Public Health and Preventive Medicine, Monash University, Level 2, 553 St Kilda Road, Melbourne, VIC 3004, Australia
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7
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Jiang YF, Luo WW, Zhang X, Ren DD, Huang YB. Relative Humidity Affects Acute Otitis Media Visits of Preschool Children to the Emergency Department. EAR, NOSE & THROAT JOURNAL 2021:1455613211009151. [PMID: 33866869 DOI: 10.1177/01455613211009151] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
OBJECTIVE The associations between climate variables and diseases such as respiratory infections, influenza, pediatric seizure, and gastroenteritis have been long appreciated. Infection is the main reason for acute otitis media (AOM) incidence. However, few previous studies explored the correlation between climatic parameters and AOM infections. The most important meteorological factors, temperature, relative humidity, and fine particulate matter (PM2.5), were included in this study. We studied the relationship between these meteorological factors and the AOM visits. MATERIALS AND METHODS It was a retrospective cross-sectional study. A linear correlation and a linear regression model were used to explore the AOM visits and meteorological factors. RESULTS A total of 7075 emergency department visits for AOM were identified. Relative humidity was found an independent risk factor for the AOM visits in preschool children (regression coefficient = -10.841<0, P = .039 < .05), but not in infants and school-age children. Average temperature and PM2.5 were not correlated with AOM visits. CONCLUSION Humidity may have a significant inverse impact on the incidence of AOM in preschool-age children.
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Affiliation(s)
- Ying-Fang Jiang
- Nursing Department, Eye and ENT Hospital, 12478Fudan University, Shanghai, People's Republic of China
| | - Wen-Wei Luo
- Department of Otolaryngology, Eye and ENT Hospital, 12478Fudan University, Shanghai, People's Republic of China.,NHC Key Laboratory of Hearing Medicine, 12478Fudan University, Shanghai, People's Republic of China
| | - Xin Zhang
- Shanghai Central Meteorological Observatory, Shanghai, People's Republic of China
| | - Dong-Dong Ren
- Department of Otolaryngology, Eye and ENT Hospital, 12478Fudan University, Shanghai, People's Republic of China.,NHC Key Laboratory of Hearing Medicine, 12478Fudan University, Shanghai, People's Republic of China
| | - Yi-Bo Huang
- Department of Otolaryngology, Eye and ENT Hospital, 12478Fudan University, Shanghai, People's Republic of China.,NHC Key Laboratory of Hearing Medicine, 12478Fudan University, Shanghai, People's Republic of China
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Wang H, Liu Z, Xiang J, Tong MX, Lao J, Liu Y, Zhang J, Zhao Z, Gao Q, Jiang B, Bi P. Effect of ambient temperatures on category C notifiable infectious diarrhea in China: An analysis of national surveillance data. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 759:143557. [PMID: 33198999 DOI: 10.1016/j.scitotenv.2020.143557] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 08/20/2020] [Accepted: 11/02/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Many studies have explored the association between meteorological factors and infectious diarrhea (ID) transmission but with inconsistent results, in particular the roles from temperatures. We aimed to explore the effects of temperatures on the transmission of category C ID, to identify its potential heterogeneity in different climate zones of China, and to provide scientific evidence to health authorities and local communities for necessary public health actions. METHODS Daily category C ID counts and meteorological variables were collected from 270 cities in China over the period of 2014-16. Distributed lag non-linear models (DLNMs) were applied in each city to obtain the city-specific temperature-disease associations, then a multivariate meta-analysis was implemented to pool the city-specific effects. Multivariate meta-regression was conducted to explore the potential effect modifiers. Attributable fraction was calculated for both low and high temperatures, defined as temperatures below the 5th percentile of temperature or above the 95th percentile of temperature. RESULTS A total of 2,715,544 category C ID cases were reported during the study period. Overall, a M-shaped curve relationship was observed between temperature and category C ID, with a peak at the 81st percentile of temperatures (RR = 1.723, 95% CI: 1.579-1.881) compared to 50th percentile of temperatures. The pooled associations were generally stronger at high temperatures compared to low ambient temperatures, and the attributable fraction due to heat was higher than cold. Latitude was identified as a possible effect modifier. CONCLUSIONS The overall positive pooled associations between temperature and category C ID in China suggest the increasing temperature could bring about more category C infectious diarrhea cases, which warrants further public health measurements.
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Affiliation(s)
- Haitao Wang
- Department of Epidemiology, School of Public Health, Shandong University, Jinan, Shandong, China
| | - Zhidong Liu
- Department of Epidemiology, School of Public Health, Shandong University, Jinan, Shandong, China
| | - Jianjun Xiang
- School of Public Health, Fujian Medical University, Fuzhou, Fujian, China; School of Public Health, The University of Adelaide, Adelaide, South Australia, Australia
| | - Michael Xiaoliang Tong
- School of Public Health, The University of Adelaide, Adelaide, South Australia, Australia
| | - Jiahui Lao
- Department of Epidemiology, School of Public Health, Shandong University, Jinan, Shandong, China
| | - Yanyu Liu
- Department of Epidemiology, School of Public Health, Shandong University, Jinan, Shandong, China
| | - Jing Zhang
- Department of Epidemiology, School of Public Health, Shandong University, Jinan, Shandong, China
| | - Zhe Zhao
- Department of Epidemiology, School of Public Health, Shandong University, Jinan, Shandong, China
| | - Qi Gao
- Department of Epidemiology, School of Public Health, Shandong University, Jinan, Shandong, China
| | - Baofa Jiang
- Department of Epidemiology, School of Public Health, Shandong University, Jinan, Shandong, China; Shandong University Climate Change and Health Center, Jinan, Shandong, China.
| | - Peng Bi
- School of Public Health, The University of Adelaide, Adelaide, South Australia, Australia
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Rouen A, Adda J, Roy O, Rogers E, Lévy P. COVID-19: relationship between atmospheric temperature and daily new cases growth rate. Epidemiol Infect 2020; 148:e184. [PMID: 32811577 PMCID: PMC7463156 DOI: 10.1017/s0950268820001831] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 08/01/2020] [Accepted: 08/13/2020] [Indexed: 01/24/2023] Open
Abstract
Purpose: The novel coronavirus (severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2)) first appeared in Wuhan, China, in December 2019, and rapidly spread across the globe. Since most respiratory viruses are known to show a seasonal pattern of infection, it has been hypothesised that SARS-CoV-2 may be seasonally dependent as well. The present study looks at a possible effect of atmospheric temperature, which is one of the suspected factors influencing seasonality, on the evolution of the pandemic. Basic procedures: Since confirming a seasonal pattern would take several more months of observation, we conducted an innovative day-to-day micro-correlation analysis of nine outbreak locations, across four continents and both hemispheres, in order to examine a possible relationship between atmospheric temperature (used as a proxy for seasonality) and outbreak progression. Main findings: There was a negative correlation between atmospheric temperature variations and daily new cases growth rates, in all nine outbreaks, with a median lag of 10 days. Principal conclusions: The results presented here suggest that high temperatures might dampen SARS-CoV-2 propagation, while lower temperatures might increase its transmission. Our hypothesis is that this could support a potential effect of atmospheric temperature on coronavirus disease progression, and potentially a seasonal pattern for this virus, with a peak in the cold season and rarer occurrences in the summer. This could guide government policy in both the Northern and Southern hemispheres for the months to come.
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Affiliation(s)
- A. Rouen
- Département de Génétique Médicale, unité INSERM U933, Hôpital Armand-Trousseau, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - J. Adda
- Département de Cardiologie, CHU Montpellier, Montpellier, France
| | - O. Roy
- Synlab Paris, Synlab France, Paris, France
| | - E. Rogers
- Département de Génétique Médicale, unité INSERM U933, Hôpital Armand-Trousseau, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - P. Lévy
- Departement de Santé Publique, Institut Pierre-Louis de Santé Publique (INSERM UMR S 1136, EPAR Team), Sorbonne Université, Assistance Publique-Hôpitaux de Paris, Hôpital Tenon, 75020Paris, France
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10
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Sharma D, Sandelski MM, Ting J, Higgins TS. Correlations in Trends of Sinusitis-Related Online Google Search Queries in the United States. Am J Rhinol Allergy 2020; 34:482-486. [PMID: 32064888 DOI: 10.1177/1945892420905761] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Online search query trends have been shown to correlate with real-life epidemiologic phenomena. OBJECTIVE The aim of this study was to analyze correlations in trends in Google online search volumes of sinusitis-related terms, including symptomatology and similar disease states. METHODS Terms clinically associated with "sinusitis" were determined by consensus. Terms of symptomatology were derived from the validated 22-item sinonasal outcome test (SNOT-22) as well as terminology encountered with the authors' clinical experience. Terms of disease states that could overlap in symptomatology with sinusitis were then chosen. Google Trends, an online tool for extracting relative frequencies from a public database of search queries, was used to query normalized monthly volumes in the United States from January 2004 to September 2017 of searches related to the topics decided upon by consensus. Bivariate Pearson correlation was used to compare the search queries. RESULTS Online search volumes of "sinusitis" have a distinct seasonal variation, with consistent annual peaks and troughs. In terms of symptomatology, "postnasal drip," "nasal congestion," "cough," "rhinorrhea," and "sore throat" most highly correlated with "sinusitis" search volumes with statistical significance. "sinusitis" search query volume had a higher positive correlation with "common cold" and "acute sinusitis" than "chronic sinusitis" with regard to disease states. CONCLUSIONS Trends in Google online search volumes over time of "sinusitis" symptomatology mimic real-world clinical phenomena and provide insight into the issues affecting the general population.
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Affiliation(s)
- Dhruv Sharma
- Department of Otolaryngology-Head and Neck Surgery, Indiana University, Bloomington, Indiana.,Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana
| | - Morgan M Sandelski
- Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana
| | - Jonathan Ting
- Department of Otolaryngology-Head and Neck Surgery, Indiana University, Bloomington, Indiana.,Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana
| | - Thomas S Higgins
- Department of Otolaryngology-Head and Neck Surgery, University of Louisville, Louisville, Kentucky.,Rhinology, Sinus & Skull Base, Kentuckiana Ear, Nose, and Throat, Louisville, Kentucky
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Bourdin A, Fabry-Vendrand C, Ostinelli J, Ait-Yahia M, Darnal E, Bouee S, Laurendeau C, Bureau I, Gourmelen J, Chouaid C. The Burden of Severe Asthma in France: A Case-Control Study Using a Medical Claims Database. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY-IN PRACTICE 2019; 7:1477-1487. [PMID: 30685573 DOI: 10.1016/j.jaip.2018.12.029] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Revised: 12/20/2018] [Accepted: 12/21/2018] [Indexed: 12/26/2022]
Abstract
BACKGROUND Severe asthma (SA) is defined by treatment intensity. The availability of national databases allows accurate estimation of the prevalence, long-term outcomes, and costs of SA. OBJECTIVE To provide accurate information on SA, focusing on comorbidities, mortality, health care resource consumption, and associated costs. METHODS A cohort of patients with SA identified in 2012 was extracted from a French representative claims database and followed for 3 years. Their characteristics, comorbidities, mortality, and direct costs were compared with a matched control group without asthma. RESULTS A total of 690 patients with SA were matched to 2070 patients without asthma (mean age, 61 years; 65.7% women). The prevalence of SA was estimated to be 0.18% to 0.51% of the French adult population. Comorbidities were more frequent in patients with SA (73.9% suffered from cardiovascular disease vs 54.3% in controls; P < .001). A total of 58.7% of patients with SA used oral corticosteroids (OCS) in 2012 with a mean intake of 3.3 boxes/year/patient and 9% received ≥6 dispensings of OCS. A total of 6.7% were treated by omalizumab. Patients with SA were more frequently hospitalized (33.2% vs 19.7%; P < .001), more frequently consulted a general practitioner (97.8% vs 83.9%; P < .001) (9.8 ± 6.8 vs 6.2 ± 5.3 consultations/year; P < .001), and 31% have consulted a private respiratory physician. Compared with controls, 3-year cumulative mortality was higher in SA (7.1% vs 4.5%; P = .007). Direct medical cost was $9227 versus $3950 (P < .001) mostly driven by medication costs. CONCLUSIONS The prevalence of SA in the French adult population is at least 18 of 10,000. Burden of disease is high with respect to comorbidities, mortality, and asthma-related health care resource use.
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Affiliation(s)
- Arnaud Bourdin
- Département de Pneumologie et Addictologie, Hôpital Arnaud de Villeneuve, CHU de Montpellier, Montpellier, France; PhyMedExp, University of Montpellier, INSERM U1046, CNRS UMR 9214, Hôpital Arnaud de Villeneuve, CHU de Montpellier, Montpellier, France
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12
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Relationship of Meteorological and Air Pollution Parameters with Pneumonia in Elderly Patients. Emerg Med Int 2018; 2018:4183203. [PMID: 29755789 PMCID: PMC5884022 DOI: 10.1155/2018/4183203] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Accepted: 02/18/2018] [Indexed: 12/14/2022] Open
Abstract
Background and Purpose In this study, we aimed to evaluate the relationship between pneumonia and meteorological parameters (temperature, humidity, precipitation, airborne particles, sulfur dioxide (SO2), carbon monoxide (CO), nitrogen dioxide (NO2), nitrite oxide (NO), and nitric oxide (NOX)) in patients with the diagnosis of pneumonia in the emergency department. Methods Our study was performed retrospectively with patients over 65 years of age who were diagnosed with pneumonia. The meteorological variables in the days of diagnosing pneumonia were compared with the meteorological variables in the days without diagnosis of pneumonia. The sociodemographic characteristics, complete blood count of the patients, and meteorological parameters (temperature, humidity, precipitation, airborne particles, SO2, CO, NO2, NO, and NOX) were investigated. Results When the temperature was high and low, the number of days consulted due to pneumonia was related to low air temperature (p < 0.05). During the periods when PM 10, NO, NO2, NOX, and CO levels were high, the number of days referred for pneumonia was increased (p < 0.05). Conclusion As a result, climatic (temperature, humidity, pressure levels, rain, etc.) and environmental factors (airborne particles, CO, NO, and NOX) were found to be effective in the number of patients admitted to the hospital due to pneumonia.
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Basile L, Oviedo de la Fuente M, Torner N, Martínez A, Jané M. Real-time predictive seasonal influenza model in Catalonia, Spain. PLoS One 2018. [PMID: 29513710 PMCID: PMC5841785 DOI: 10.1371/journal.pone.0193651] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Influenza surveillance is critical to monitoring the situation during epidemic seasons and predictive mathematic models may aid the early detection of epidemic patterns. The objective of this study was to design a real-time spatial predictive model of ILI (Influenza Like Illness) incidence rate in Catalonia using one- and two-week forecasts. The available data sources used to select explanatory variables to include in the model were the statutory reporting disease system and the sentinel surveillance system in Catalonia for influenza incidence rates, the official climate service in Catalonia for meteorological data, laboratory data and Google Flu Trend. Time series for every explanatory variable with data from the last 4 seasons (from 2010–2011 to 2013–2014) was created. A pilot test was conducted during the 2014–2015 season to select the explanatory variables to be included in the model and the type of model to be applied. During the 2015–2016 season a real-time model was applied weekly, obtaining the intensity level and predicted incidence rates with 95% confidence levels one and two weeks away for each health region. At the end of the season, the confidence interval success rate (CISR) and intensity level success rate (ILSR) were analysed. For the 2015–2016 season a CISR of 85.3% at one week and 87.1% at two weeks and an ILSR of 82.9% and 82% were observed, respectively. The model described is a useful tool although it is hard to evaluate due to uncertainty. The accuracy of prediction at one and two weeks was above 80% globally, but was lower during the peak epidemic period. In order to improve the predictive power, new explanatory variables should be included.
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Affiliation(s)
- Luca Basile
- Public Health Agency of Catalonia, Barcelona, Spain
| | - Manuel Oviedo de la Fuente
- Technological Institute for Industrial Mathematics (ITMATI), Campus Vida, Santiago de Compostela, Spain
- MODESTYA Group, Department of Statistics, Mathematical Analysis and Optimization, University of Santiago de Compostela, Santiago de Compostela, Spain
| | - Nuria Torner
- Public Health Agency of Catalonia, Barcelona, Spain
- Department of Medicine, University of Barcelona Barcelona, Spain
- CIBER Epidemiology and Public Health CIBERESP, Carlos III Health Institute, Madrid, Spain
- * E-mail:
| | - Ana Martínez
- Public Health Agency of Catalonia, Barcelona, Spain
- CIBER Epidemiology and Public Health CIBERESP, Carlos III Health Institute, Madrid, Spain
| | - Mireia Jané
- Public Health Agency of Catalonia, Barcelona, Spain
- CIBER Epidemiology and Public Health CIBERESP, Carlos III Health Institute, Madrid, Spain
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14
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Song X, Wang S, Hu Y, Yue M, Zhang T, Liu Y, Tian J, Shang K. Impact of ambient temperature on morbidity and mortality: An overview of reviews. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 586:241-254. [PMID: 28187945 DOI: 10.1016/j.scitotenv.2017.01.212] [Citation(s) in RCA: 181] [Impact Index Per Article: 25.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Revised: 01/02/2017] [Accepted: 01/30/2017] [Indexed: 05/18/2023]
Abstract
The objectives were (i) to conduct an overview of systematic reviews to summarize evidence from and evaluate the methodological quality of systematic reviews assessing the impact of ambient temperature on morbidity and mortality; and (ii) to reanalyse meta-analyses of cold-induced cardiovascular morbidity in different age groups. The registration number is PROSPERO-CRD42016047179. PubMed, Embase, the Cochrane Library, Web of Science, the Cumulative Index to Nursing and Allied Health Literature (CINAHL), and Global Health were systematically searched to identify systematic reviews. Two reviewers independently selected studies for inclusion, extracted data, and assessed quality. The Assessment of Multiple Systematic Reviews (AMSTAR) checklist was used to assess the methodological quality of included systematic reviews. Estimates of morbidity and mortality risk in association with heat exposure, cold exposure, heatwaves, cold spells and diurnal temperature ranges (DTRs) were the primary outcomes. Twenty-eight systematic reviews were included in the overview of systematic reviews. (i) The median (interquartile range) AMSTAR scores were 7 (1.75) for quantitative reviews and 3.5 (1.75) for qualitative reviews. (ii) Heat exposure was identified to be associated with increased risk of cardiovascular, cerebrovascular and respiratory mortality, but was not found to have an impact on cardiovascular or cerebrovascular morbidity. (iii) Reanalysis of the meta-analyses indicated that cold-induced cardiovascular morbidity increased in youth and middle-age (RR=1.009, 95% CI: 1.004-1.015) as well as the elderly (RR=1.013, 95% CI: 1.007-1.018). (iv) The definitions of temperature exposure adopted by different studies included various temperature indicators and thresholds. In conclusion, heat exposure seemed to have an adverse effect on mortality and cold-induced cardiovascular morbidity increased in the elderly. Developing definitions of temperature exposure at the regional level may contribute to more accurate evaluations of the health effects of temperature.
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Affiliation(s)
- Xuping Song
- Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, China.
| | - Shigong Wang
- Mountain Environment and Meteorology Key Laboratory of Education Bureau of Sichuan Province, College of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu 610225, China; Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, China.
| | - Yuling Hu
- Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, China.
| | - Man Yue
- Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, China.
| | - Tingting Zhang
- School and Hospital of Stomatology, Wuhan University, Wuhan 430079, China.
| | - Yu Liu
- School of Public Health, Lanzhou University, Lanzhou 730000, China.
| | - Jinhui Tian
- Evidence Based Medicine Center, School of Basic Medical Sciences, Lanzhou University, Lanzhou 730000, China.
| | - Kezheng Shang
- Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, China.
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Ye Q, Fu JF, Mao JH, Shang SQ. Haze is a risk factor contributing to the rapid spread of respiratory syncytial virus in children. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:20178-20185. [PMID: 27439752 DOI: 10.1007/s11356-016-7228-6] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Accepted: 07/11/2016] [Indexed: 05/26/2023]
Abstract
This study investigated whether respiratory syncytial virus (RSV) infection in children was associated with ambient temperature and air pollutants in Hangzhou, China. A distributed lag non-linear model (DLNM) was used to estimate the effects of daily meteorological data and air pollutants on the incidence of RSV infection among children. A total of 3650 childhood RSV infection cases were included in the study. The highest air pollutant concentrations were in January to May and October to December during the year. The yearly RSV-positive rate was 10.0 % among children with an average age of 4.3 months. The highest RSV-positive rate occurred among patients 0 to 3 months old. Children under 6.5 months old accounted for 80 % of the total patients infected by RSV. A negative correlation was found between ambient temperature and RSV infection, and it was strongest with minimum ambient temperature (r = -0.804, P < 0.001). There was a positive correlation between the infection rate and the particulate matter (PM) 2.5 (r = 0.446, P < 0.001), PM10 (r = 0.397, P < 0.001), SO2 (r = 0.389, P < 0.001), NO2 (r = 0.365, P < 0.001) and CO (r = 0.532, P < 0.001). The current study suggested that temperature was an important factor associated with RSV infection among children in Hangzhou. Air pollutants significantly increased the risk of RSV infection with dosage, lag and cumulative effects.
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Affiliation(s)
- Qing Ye
- Zhejiang Key Laboratory for Neonatal Diseases, The Children's Hospital of Zhejiang University School of Medicine, Hangzhou, People's Republic of China
| | - Jun-Fen Fu
- Zhejiang Key Laboratory for Neonatal Diseases, The Children's Hospital of Zhejiang University School of Medicine, Hangzhou, People's Republic of China
| | - Jian-Hua Mao
- Zhejiang Key Laboratory for Neonatal Diseases, The Children's Hospital of Zhejiang University School of Medicine, Hangzhou, People's Republic of China
| | - Shi-Qiang Shang
- Zhejiang Key Laboratory for Neonatal Diseases, The Children's Hospital of Zhejiang University School of Medicine, Hangzhou, People's Republic of China.
- Clinical Laboratory, The Children's Hospital, Zhejiang University School of Medicine, Hangzhou, People's Republic of China.
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Zhu L, Wang X, Guo Y, Xu J, Xue F, Liu Y. Assessment of temperature effect on childhood hand, foot and mouth disease incidence (0-5years) and associated effect modifiers: A 17 cities study in Shandong Province, China, 2007-2012. THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 551-552:452-9. [PMID: 26891011 DOI: 10.1016/j.scitotenv.2016.01.173] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2015] [Revised: 01/13/2016] [Accepted: 01/26/2016] [Indexed: 05/23/2023]
Abstract
BACKGROUND Previous studies examining temperature-disease associations of hand, foot and mouth disease (HFMD) mainly focused on a single city. The results demonstrated great heterogeneity. A multi-city study is necessary to better understand temperature risk on the childhood incidence of HFMD and the associated modified factors. OBJECTIVE To assess the effect of ambient temperature on childhood HFMD incidence and explore the potential associated effect modifiers in the study area. METHODS Daily morbidity data and meteorological variables of the 17 cities were collected for the period from 2007 to 2012. Distributed lag non-linear model (DLNM) was used to estimate city-specific effects of temperature on HFMD incidence. A multivariate meta-analysis was then applied to pool the estimated city-specific effect. Potential effect modifiers were included in the multivariate meta-regression as meta-predictors. RESULTS A total of 504,017 childhood HFMD cases were included in the study. The high-incidence period of HFMD was detected in late spring and early summer (April to June). The temperature-disease associations of the 17 cities demonstrated great heterogeneity and the pooled exposure-response curve was an approximately inverted V-shape. Regional indicator, numbers of healthcare institution and annual household income were considered as associated modifiers. CONCLUSION Our findings can provide a practical reference for the early warning and intervention strategies of HFMD. Different temperature-disease associations among different regions should be considered when formulating and optimizing public health policy.
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Affiliation(s)
- Lin Zhu
- Department of Epidemiology and Biostatistics, School of Public Health, Shandong University, Jinan, Shandong, China
| | - Xianjun Wang
- Shandong Center for Disease Control and Prevention, Jinan, Shandong, China
| | - Yuming Guo
- Division of Epidemiology and Biostatistics, School of Public Health, University of Queensland, Brisbane, Australia
| | - Jing Xu
- Department of Epidemiology and Biostatistics, School of Public Health, Shandong University, Jinan, Shandong, China
| | - Fuzhong Xue
- Department of Epidemiology and Biostatistics, School of Public Health, Shandong University, Jinan, Shandong, China.
| | - Yanxun Liu
- Department of Epidemiology and Biostatistics, School of Public Health, Shandong University, Jinan, Shandong, China.
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Liu Y, Liu J, Chen F, Shamsi BH, Wang Q, Jiao F, Qiao Y, Shi Y. Impact of meteorological factors on lower respiratory tract infections in children. J Int Med Res 2015; 44:30-41. [PMID: 26658270 PMCID: PMC5536566 DOI: 10.1177/0300060515586007] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2015] [Accepted: 04/17/2015] [Indexed: 11/16/2022] Open
Abstract
Objective To evaluate retrospectively the relationship between meteorological factors in Shenmu County, Yulin City, Shaanxi Province, China and the incidence of lower respiratory tract infections in children. Methods Meteorological data (air temperature, atmospheric pressure, rainfall, hours of sunlight, wind speed and relative humidity) for Shenmu County and medical data from hospitalized patients aged ≤16 years were collected between January 2009 and December 2012. The association between meteorological factors and rate of hospitalization due to lower respiratory tract infections was investigated; the total hospitalization rate was compared with the rate of lower respiratory tract disease-related hospitalizations. Results The leading bacterial causes of lower respiratory tract infections were Streptococcus pneumoniae and Haemophilus influenzae type B; the main viral cause was respiratory syncytial virus. Lower respiratory tract infection hospitalization rate was significantly correlated with air temperature (R = −0.651), atmospheric pressure (R = 0.560), rainfall (R = −0.614) and relative humidity (R = −0.470), but not with hours of sunlight (R = −0.210) or wind speed (R = 0.258). Using multiple linear regression, lower respiratory tract infection hospitalization rate decreased with a gradual increase in air temperature (F = 38.30) and relative humidity (F = 15.58). Conclusion Air temperature and relative humidity were major influencing meteorological factors for hospital admissions in children due to lower respiratory tract infections.
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Affiliation(s)
- Yonglin Liu
- Paediatrics Department, Shenmu Hospital, Shenmu County, Yulin City, Shaanxi Province, China
| | - Juan Liu
- Paediatrics Department, Shenmu Hospital, Shenmu County, Yulin City, Shaanxi Province, China
| | - Fenglian Chen
- Paediatrics Department, Shenmu Hospital, Shenmu County, Yulin City, Shaanxi Province, China
| | - Bilal Haider Shamsi
- Paediatrics Department, Shenmu Hospital, Shenmu County, Yulin City, Shaanxi Province, China
| | - Qiang Wang
- Executive Director, Shenmu Hospital, Shenmu County, Yulin City, Shaanxi Province, China
| | - Fuyong Jiao
- Children's Hospital, Shaanxi Provincial People's Hospital, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi Province, China
| | - Yanmei Qiao
- Paediatrics Department, Shenmu Hospital, Shenmu County, Yulin City, Shaanxi Province, China
| | - Yanhua Shi
- Paediatrics Department, Shenmu Hospital, Shenmu County, Yulin City, Shaanxi Province, China
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Zhu L, Yuan Z, Wang X, Li J, Wang L, Liu Y, Xue F, Liu Y. The Impact of Ambient Temperature on Childhood HFMD Incidence in Inland and Coastal Area: A Two-City Study in Shandong Province, China. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2015; 12:8691-704. [PMID: 26213955 PMCID: PMC4555242 DOI: 10.3390/ijerph120808691] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Revised: 07/13/2015] [Accepted: 07/17/2015] [Indexed: 12/04/2022]
Abstract
Hand, foot and mouth disease (HFMD) has been a substantial burden throughout the Asia-Pacific countries over the past decades. For the purposes of disease prevention and climate change health impact assessment, it is important to understand the temperature-disease association for HFMD in different geographical locations. This study aims to assess the impact of temperature on HFMD incidence in an inland city and a coastal city and investigate the heterogeneity of temperature-disease associations. Daily morbidity data and meteorological variables of the study areas were collected for the period from 2007 to 2012. A total of 108,377 HFMD cases were included in this study. A distributed lag non-linear model (DLNM) with Poisson distribution was used to examine the nonlinear lagged effects of daily mean temperature on HFMD incidence. After controlling potential confounders, temperature showed significant association with HFMD incidence and the two cities demonstrated different impact modes ( I2= 96.1%; p < 0.01). The results highlight the effect of temperature on HFMD incidence and the impact pattern may be modified by geographical localities. Our findings can be a practical reference for the early warning and intervention strategies of HFMD.
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Affiliation(s)
- Lin Zhu
- Department of Epidemiology and Biostatistics, School of Public Health, Shandong University, Jinan 250012, China.
| | - Zhongshang Yuan
- Department of Epidemiology and Biostatistics, School of Public Health, Shandong University, Jinan 250012, China.
| | - Xianjun Wang
- Shandong Center for Disease Control and Prevention, Jinan 250012, China.
| | - Jie Li
- Department of Epidemiology and Biostatistics, School of Public Health, Shandong University, Jinan 250012, China.
| | - Lu Wang
- Department of Epidemiology and Biostatistics, School of Public Health, Shandong University, Jinan 250012, China.
| | - Yunxia Liu
- Department of Epidemiology and Biostatistics, School of Public Health, Shandong University, Jinan 250012, China.
| | - Fuzhong Xue
- Department of Epidemiology and Biostatistics, School of Public Health, Shandong University, Jinan 250012, China.
| | - Yanxun Liu
- Department of Epidemiology and Biostatistics, School of Public Health, Shandong University, Jinan 250012, China.
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Plante DT, Ingram DG. Seasonal trends in tinnitus symptomatology: evidence from Internet search engine query data. Eur Arch Otorhinolaryngol 2014; 272:2807-13. [PMID: 25234771 DOI: 10.1007/s00405-014-3287-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Accepted: 09/07/2014] [Indexed: 11/25/2022]
Abstract
The primary aim of this study was to test the hypothesis that the symptom of tinnitus demonstrates a seasonal pattern with worsening in the winter relative to the summer using Internet search engine query data. Normalized search volume for the term 'tinnitus' from January 2004 through December 2013 was retrieved from Google Trends. Seasonal effects were evaluated using cosinor regression models. Primary countries of interest were the United States and Australia. Secondary exploratory analyses were also performed using data from Germany, the United Kingdom, Canada, Sweden, and Switzerland. Significant seasonal effects for 'tinnitus' search queries were found in the United States and Australia (p < 0.00001 for both countries), with peaks in the winter and troughs in the summer. Secondary analyses demonstrated similarly significant seasonal effects for Germany (p < 0.00001), Canada (p < 0.00001), and Sweden (p = 0.0008), again with increased search volume in the winter relative to the summer. Our findings indicate that there are significant seasonal trends for Internet search queries for tinnitus, with a zenith in winter months. Further research is indicated to determine the biological mechanisms underlying these findings, as they may provide insights into the pathophysiology of this common and debilitating medical symptom.
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Affiliation(s)
- David T Plante
- Department of Psychiatry, Wisconsin Psychiatric Institute and Clinics, University of Wisconsin School of Medicine and Public Health, 6001 Research Park Blvd., Madison, WI, 53719, USA,
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