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Li X, Zhang L, Tan C, Wu Y, Zhang Z, Ding J, Li Y. The impact of temperature, humidity and closing school on the mumps epidemic: a case study in the mainland of China. BMC Public Health 2024; 24:1632. [PMID: 38898424 PMCID: PMC11186224 DOI: 10.1186/s12889-024-18819-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Accepted: 05/09/2024] [Indexed: 06/21/2024] Open
Abstract
BACKGROUND To control resurging infectious diseases like mumps, it is necessary to resort to effective control and preventive measures. These measures include increasing vaccine coverage, providing the community with advice on how to reduce exposure, and closing schools. To justify such intervention, it is important to understand how well each of these measures helps to limit transmission. METHODS In this paper, we propose a simple SEILR (susceptible-exposed-symptomatically infectious-asymptomatically infectious-recovered) model by using a novel transmission rate function to incorporate temperature, humidity, and closing school factors. This new transmission rate function allows us to verify the impact of each factor either separately or combined. Using reported mumps cases from 2004 to 2018 in the mainland of China, we perform data fitting and parameter estimation to evaluate the basic reproduction number R 0 . As a wide range of one-dose measles, mumps, and rubella (MMR) vaccine programs in China started only in 2008, we use different vaccination proportions for the first Stage I period (from 2004 to 2008) and the second Stage II period (from 2009 to 2018). This allows us to verify the importance of higher vaccine coverage with a possible second dose of MMR vaccine. RESULTS We find that the basic reproduction number R 0 is generally between 1 and 3. We then use the Akaike Information Criteria to assess the extent to which each of the three factors contributed to the spread of mumps. The findings suggest that the impact of all three factors is substantial, with temperature having the most significant impact, followed by school opening and closing, and finally humidity. CONCLUSION We conclude that the strategy of increasing vaccine coverage, changing micro-climate (temperature and humidity), and closing schools can greatly reduce mumps transmission.
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Affiliation(s)
- Xiaoqun Li
- School of Information and Mathematics, Yangtze University, Nanhuan Road, Jingzhou, 434023, China
| | - Lianyun Zhang
- School of Information and Mathematics, Yangtze University, Nanhuan Road, Jingzhou, 434023, China
| | - Changlei Tan
- Information Engineering College, Hunan Applied Technology University, Shanjuan Road, Changde, 415100, China
| | - Yan Wu
- Department of Operations Research and Information Engineering, Beijing University of Technology, Pingle Garden, Beijing, 100124, China
| | - Ziheng Zhang
- School of Environment, Education & Development (SEED), The University of Manchester, Oxford Road, M139PL, Manchester, UK
| | - Juan Ding
- Jingzhou Hospital Affiliated to Yangtze University, Chuyuan Avenue, Jingzhou, 434023, China.
| | - Yong Li
- School of Information and Mathematics, Yangtze University, Nanhuan Road, Jingzhou, 434023, China.
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Liang W, Hu A, Hu P, Zhu J, Wang Y. Estimating the tuberculosis incidence using a SARIMAX-NNARX hybrid model by integrating meteorological factors in Qinghai Province, China. INTERNATIONAL JOURNAL OF BIOMETEOROLOGY 2023; 67:55-65. [PMID: 36271168 DOI: 10.1007/s00484-022-02385-0] [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: 11/26/2021] [Revised: 09/30/2022] [Accepted: 10/06/2022] [Indexed: 06/16/2023]
Abstract
Tuberculosis (TB) is recognized as being a major public health concern owing to its increase in Qinghai, China. In this study, we aimed to estimate the long-term effects of meteorological variables on TB incidence and construct an advanced hybrid model with seasonal autoregressive integrated moving average (SARIMA) and a neural network nonlinear autoregression (SARIMAX-NNARX) by integrating meteorological factors and evaluating the model fitting and prediction effect. During 2005-2017, TB experienced an upward trend with obvious periodic and seasonal characteristics, peaking in spring and winter. The results showed that TB incidence was positively correlated with average relative humidity (ARH) with a 2-month lag (β = 1.889, p = 0.003), but negatively correlated with average atmospheric pressure (AAP) with a 1-month lag (β = - 1.633, p = 0.012), average temperature (AT) with a 2-month lag (β = - 0.093, p = 0.027), and average wind speed (AWS) with a 0-month lag (β = - 13.221, p = 0.033), respectively. The SARIMA (3,1,0)(1,1,1)12, SARIMAX(3,1,0)(1,1,1)12, and SARIMAX(3,1,0)(1,1,1)12-NNARX(15,3) were considered preferred models based on the evaluation criteria. Of them, the SARIMAX-NNARX technique had smaller error values than the SARIMA and SARIMAX models in both fitting and forecasting aspects. The sensitivity analysis also revealed the robustness of the mixture forecasting model. Therefore, the SARIMAX-NNARX model by integrating meteorological variables can be used as an accurate method for forecasting the epidemic trends which would be great importance for TB prevention and control in the coming periods in Qinghai.
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Affiliation(s)
- Wenjuan Liang
- Department of Epidemiology, International School of Public Health and One Health, Hainan Medical University, Haikou, Hainan Province, 571199, People's Republic of China
- Department of Epidemiology and Health Statistics, School of Public Health, The Third Affiliated Hospital, Xinxiang Medical University, No. 601 Jinsui Road, Hongqi District, Xinxiang, Henan Province, 453003, People's Republic of China
| | - Ailing Hu
- Department of Epidemiology and Health Statistics, School of Public Health, The Third Affiliated Hospital, Xinxiang Medical University, No. 601 Jinsui Road, Hongqi District, Xinxiang, Henan Province, 453003, People's Republic of China
| | - Pan Hu
- Department of Epidemiology and Health Statistics, School of Public Health, The Third Affiliated Hospital, Xinxiang Medical University, No. 601 Jinsui Road, Hongqi District, Xinxiang, Henan Province, 453003, People's Republic of China
| | - Jinqin Zhu
- Department of Epidemiology and Health Statistics, School of Public Health, The Third Affiliated Hospital, Xinxiang Medical University, No. 601 Jinsui Road, Hongqi District, Xinxiang, Henan Province, 453003, People's Republic of China
| | - Yongbin Wang
- Department of Epidemiology and Health Statistics, School of Public Health, The Third Affiliated Hospital, Xinxiang Medical University, No. 601 Jinsui Road, Hongqi District, Xinxiang, Henan Province, 453003, People's Republic of China.
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Li C, Zhao Z, Yan Y, Liu Q, Zhao Q, Ma W. Short-term effects of tropical cyclones on the incidence of dengue: a time-series study in Guangzhou, China. Parasit Vectors 2022; 15:358. [PMID: 36203178 PMCID: PMC9535872 DOI: 10.1186/s13071-022-05486-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2022] [Accepted: 09/16/2022] [Indexed: 11/12/2022] Open
Abstract
Background Limited evidence is available about the association between tropical cyclones and dengue incidence. This study aimed to examine the effects of tropical cyclones on the incidence of dengue and to explore the vulnerable populations in Guangzhou, China. Methods Weekly dengue case data, tropical cyclone and meteorological data during the tropical cyclones season (June to October) from 2015 to 2019 were collected for the study. A quasi-Poisson generalized linear model combined with a distributed lag non-linear model was conducted to quantify the association between tropical cyclones and dengue, controlling for meteorological factors, seasonality, and long-term trend. Proportion of dengue cases attributable to tropical cyclone exposure was calculated. The effect difference by sex and age groups was calculated to identify vulnerable populations. The tropical cyclones were classified into two levels to compare the effects of different grades of tropical cyclones on the dengue incidence. Results Tropical cyclones were associated with an increased number of dengue cases with the maximum risk ratio of 1.41 (95% confidence interval 1.17–1.69) in lag 0 week and cumulative risk ratio of 2.13 (95% confidence interval 1.28–3.56) in lag 0–4 weeks. The attributable fraction was 6.31% (95% empirical confidence interval 1.96–10.16%). Men and the elderly were more vulnerable to the effects of tropical cyclones than the others. The effects of typhoons were stronger than those of tropical storms among various subpopulations. Conclusions Our findings indicate that tropical cyclones may increase the incidence of dengue within a 4-week lag in Guangzhou, China, and the effects were more pronounced in men and the elderly. Precautionary measures should be taken with a focus on the identified vulnerable populations to control the transmission of dengue associated with tropical cyclones. Graphical Abstract ![]()
Supplementary Information The online version contains supplementary material available at 10.1186/s13071-022-05486-2.
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Affiliation(s)
- Chuanxi Li
- Department of Epidemiology, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, China.,Shandong University Climate Change and Health Center, Jinan, China
| | - Zhe Zhao
- Department of Epidemiology, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, China.,Shandong University Climate Change and Health Center, Jinan, China
| | - Yu Yan
- Department of Epidemiology, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, China.,Shandong University Climate Change and Health Center, Jinan, China
| | - Qiyong Liu
- Shandong University Climate Change and Health Center, Jinan, China.,State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Qi Zhao
- Department of Epidemiology, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, China. .,Shandong University Climate Change and Health Center, Jinan, China. .,Department of Epidemiology, IUF-Leibniz Research Institute for Environmental Medicine, Düsseldorf, Germany.
| | - Wei Ma
- Department of Epidemiology, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, China. .,Shandong University Climate Change and Health Center, Jinan, China.
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A Multi-Age-Group Interrupted Time-Series Study for Evaluating the Effectiveness of National Expanded Program on Immunization on Mumps. Vaccines (Basel) 2022; 10:vaccines10101587. [PMID: 36298452 PMCID: PMC9610758 DOI: 10.3390/vaccines10101587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2022] [Revised: 09/18/2022] [Accepted: 09/19/2022] [Indexed: 11/16/2022] Open
Abstract
The national Expanded Program on Immunization (EPI) in China has covered vaccines for measles, mumps, and rubella, among children aged 18–24 months since September 2008. However, no previous studies have quantified the effectiveness of the EPI on mumps incidence. There are methodological challenges in assessing the effect of an intervention that targets a subpopulation but finally influences the whole population. In this study, monthly data on mumps incidence were collected in Guangzhou, China, during 2005–2019. We proposed a multi-age-group interrupted time-series design, setting the starting time of exerting effect separately for 14 different age groups. A mixed-effects quasi-Poisson regression was applied to analyze the effectiveness of the EPI on mumps incidence, after controlling for long-term and seasonal trends, and meteorological factors. The model also accounted for the first-order autocorrelation within each age group. Between-age-group correlations were expressed using the contact matrix of age groups. We found that 70,682 mumps cases were reported during 2005–2019, with an annual incidence rate of 37.91 cases per 100,000 population. The effect of EPI strengthened over time, resulting in a decrease in the incidence of mumps by 16.6% (EPI-associated excess risk% = −16.6%, 95% CI: −27.0% to −4.7%) in September 2009 to 40.1% (EPI-associated excess risk% = −40.1%, 95% CI: −46.1% to −33.3%) in September 2019. A reverse U-shape pattern was found in age-specific effect estimates, with the largest reduction of 129 cases per 100,000 population (95% CI: 14 to 1173) in those aged 4–5 years. The EPI is effective in reducing the mumps incidence in Guangzhou. The proposed modeling strategy can be applied for simultaneous assessment of the effectiveness of public health interventions across different age groups, with adequate adjustment for within- and between-group correlations.
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Zhang H, Su K, Zhong X. Association between Meteorological Factors and Mumps and Models for Prediction in Chongqing, China. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19116625. [PMID: 35682208 PMCID: PMC9180516 DOI: 10.3390/ijerph19116625] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/23/2022] [Revised: 05/20/2022] [Accepted: 05/27/2022] [Indexed: 02/05/2023]
Abstract
(1) Background: To explore whether meteorological factors have an impact on the prevalence of mumps, and to make a short−term prediction of the case number of mumps in Chongqing. (2) Methods: K−means clustering algorithm was used to divide the monthly mumps cases of each year into the high and low case number clusters, and Student t−test was applied for difference analysis. The cross−correlation function (CCF) was used to evaluate the correlation between the meteorological factors and mumps, and an ARIMAX model was constructed by additionally incorporating meteorological factors as exogenous variables in the ARIMA model, and a short−term prediction was conducted for mumps in Chongqing, evaluated by MAE, RMSE. (3) Results: All the meteorological factors were significantly different (p < 0.05), except for the relative humidity between the high and low case number clusters. The CCF and ARIMAX model showed that monthly precipitation, temperature, relative humidity and wind velocity were associated with mumps, and there were significant lag effects. The ARIMAX model could accurately predict mumps in the short term, and the prediction errors (MAE, RMSE) were lower than those of the ARIMA model. (4) Conclusions: Meteorological factors can affect the occurrence of mumps, and the ARIMAX model can effectively predict the incidence trend of mumps in Chongqing, which can provide an early warning for relevant departments.
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Affiliation(s)
- Hong Zhang
- School of Public Health and Management, Chongqing Medical University, Chongqing 400016, China; (H.Z.); (K.S.)
| | - Kun Su
- School of Public Health and Management, Chongqing Medical University, Chongqing 400016, China; (H.Z.); (K.S.)
- Chongqing Municipal Center for Disease Control and Prevention, Chongqing 400042, China
- Chongqing Public Health Medical Center, Chongqing 400036, China
| | - Xiaoni Zhong
- School of Public Health and Management, Chongqing Medical University, Chongqing 400016, China; (H.Z.); (K.S.)
- Correspondence:
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Li M, Liu Y, Yan T, Xue C, Zhu X, Yuan D, Hu R, Liu L, Wang Z, Liu Y, Wang B. Epidemiological characteristics of mumps from 2004 to 2020 in Jiangsu, China: a flexible spatial and spatiotemporal analysis. Epidemiol Infect 2022; 150:1-26. [PMID: 35393005 PMCID: PMC9074115 DOI: 10.1017/s095026882200067x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 02/22/2022] [Accepted: 04/04/2022] [Indexed: 11/17/2022] Open
Abstract
The mumps resurgence has frequently been reported around the world in recent years, especially in many counties mumps vaccines have been widely used. This study aimed to describe the spatial epidemiological characteristics of mumps in Jiangsu, and provide a scientific basis for the implementation and adjustment of strategies to prevent and control mumps. The epidemiological characteristics were described with ratio or proportion. Spatial autocorrelation, Tango's flexible spatial scan statistics, and Kulldorff's elliptic spatiotemporal scan statistics were applied to identify the spatial autocorrelation, detect hot and cold spots of mumps incidence, and aggregation areas. A total of 172 775 cases were reported from 2004 to 2020 in Jiangsu. The general trend of mumps incidence is declining with a bimodal seasonal distribution identified mainly in summer and winter, respectively. Children aged 5–10 years old are the main risk group. A migration trend of hot spots from southeast to northwest over time was found. Similar high-risk aggregations were detected in the northwestern parts through spatial-temporal analysis with the most likely cluster time frame around 2019. Local medical and health administrations should formulate and implement targeted health care policies and allocate health resources more appropriately corresponding to the epidemiological characteristics of mumps.
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Affiliation(s)
- Mingma Li
- Key Laboratory of Environment Medicine Engineering of Ministry of Education, Department of Epidemiology and Health Statistics, Southeast University School of Public Health, Nanjing 210009, Jiangsu, China
| | - Yuxiang Liu
- Key Laboratory of Environment Medicine Engineering of Ministry of Education, Department of Epidemiology and Health Statistics, Southeast University School of Public Health, Nanjing 210009, Jiangsu, China
| | - Tao Yan
- Key Laboratory of Environment Medicine Engineering of Ministry of Education, Department of Epidemiology and Health Statistics, Southeast University School of Public Health, Nanjing 210009, Jiangsu, China
| | - Chenghao Xue
- Key Laboratory of Environment Medicine Engineering of Ministry of Education, Department of Epidemiology and Health Statistics, Southeast University School of Public Health, Nanjing 210009, Jiangsu, China
| | - Xiaoyue Zhu
- Key Laboratory of Environment Medicine Engineering of Ministry of Education, Department of Epidemiology and Health Statistics, Southeast University School of Public Health, Nanjing 210009, Jiangsu, China
| | - Defu Yuan
- Key Laboratory of Environment Medicine Engineering of Ministry of Education, Department of Epidemiology and Health Statistics, Southeast University School of Public Health, Nanjing 210009, Jiangsu, China
| | - Ran Hu
- Department of Expanded Program on Immunization, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, Jiangsu, China
| | - Li Liu
- Department of Expanded Program on Immunization, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, Jiangsu, China
| | - Zhiguo Wang
- Department of Expanded Program on Immunization, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, Jiangsu, China
| | - Yuanbao Liu
- Department of Expanded Program on Immunization, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, Jiangsu, China
| | - Bei Wang
- Key Laboratory of Environment Medicine Engineering of Ministry of Education, Department of Epidemiology and Health Statistics, Southeast University School of Public Health, Nanjing 210009, Jiangsu, China
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Huang JF, Zhao ZY, Lu WK, Rui J, Deng B, Liu WK, Yang TL, Li ZY, Li PH, Liu C, Luo L, Zhao B, Wang YF, Li Q, Wang MZ, Chen TM. Correlation between mumps and meteorological factors in Xiamen City, China: A modelling study. Infect Dis Model 2022; 7:127-137. [PMID: 35573860 PMCID: PMC9062423 DOI: 10.1016/j.idm.2022.04.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 04/18/2022] [Accepted: 04/18/2022] [Indexed: 11/26/2022] Open
Abstract
Objective Mumps is a seasonal infectious disease, always occurring in winter and spring. In this study, we aim to analyze its epidemiological characteristics, transmissibility, and its correlation with meteorological variables. Method A seasonal Susceptible–Exposed–Infectious/Asymptomatic–Recovered model and a next-generation matrix method were applied to estimate the time-dependent reproduction number (Rt). Results The seasonal double peak of annual incidence was mainly in May to July and November to December. There was high transmission at the median of Rt = 1.091 (ranged: 0 to 4.393). Rt was seasonally distributed mainly from February to April and from September to November. Correlations were found between temperature (Pearson correlation coefficient [r] ranged: from 0.101 to 0.115), average relative humidity (r = 0.070), average local pressure (r = -0.066), and the number of new cases. In addition, average local pressure (r = 0.188), average wind speed (r = 0.111), air temperature (r ranged: -0.128 to -0.150), average relative humidity (r = -0.203) and sunshine duration (r = -0.075) were all correlated with Rt. Conclusion A relatively high level of transmissibility has been found in Xiamen City, leading to a continuous epidemic of mumps. Meteorological factors, especially air temperature and relative humidity, may be more closely associated with mumps than other factors.
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Study on the Associations between Meteorological Factors and the Incidence of Pulmonary Tuberculosis in Xinjiang, China. ATMOSPHERE 2022. [DOI: 10.3390/atmos13040533] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Pulmonary tuberculosis (PTB) has been a major threat to global public health. The association between meteorological factors and the incidence of PTB has been widely investigated by the generalized additive model, auto-regressive integrated moving average model and the distributed lag model, etc. However, these models could not address a non-linear or lag correlation between them. In this paper, a penalized distributed lag non-linear model, as a generalized and improved one, was applied to explore the influence of meteorological factors (such as air temperature, relative humidity and wind speed) on the PTB incidence in Xinjiang from 2004 to 2019. Moreover, we firstly use a comprehensive index (apparent temperature, AT) to access the impact of multiple meteorological factors on the incidence of PTB. It was found that the relationships between air temperature, relative humidity, wind speed, AT and PTB incidence were nonlinear (showed “wave-type “, “invested U-type”, “U-type” and “wave-type”, respectively). When air temperature at the lowest value (−16.1 °C) could increase the risk of PTB incidence with the highest relative risk (RR = 1.63, 95% CI: 1.21–2.20). An assessment of relative humidity demonstrated an increased risk of PTB incidence between 44.5% and 71.8% with the largest relative risk (RR = 1.49, 95% CI: 1.32–1.67) occurring at 59.2%. Both high and low wind speeds increased the risk of PTB incidence, especially at the lowest wind speed 1.4 m/s (RR = 2.20, 95% CI: 1.95–2.51). In particular, the lag effects of low and high AT on PTB incidence were nonlinear. The lag effects of extreme cold AT (−18.5 °C, 1st percentile) on PTB incidence reached a relative risk peak (RR = 2.18, 95% CI: 2.06–2.31) at lag 1 month. Overall, it was indicated that the environment with low air temperature, suitable relative humidity and wind speed is more conducive to the transmission of PTB, and low AT is associated significantly with increased risk of PTB in Xinjiang.
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Zhu Y, Zhang D, Hu Y, Li C, Jia Y, She K, Liu T, Xu Q, Zhang Y, Li X. Exploring the Relationship between Mumps and Meteorological Factors in Shandong Province, China Based on a Two-Stage Model. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph181910359. [PMID: 34639658 PMCID: PMC8508524 DOI: 10.3390/ijerph181910359] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 09/27/2021] [Accepted: 09/28/2021] [Indexed: 12/21/2022]
Abstract
Background: Small-scale studies have identified temperature and other meteorological factors as risk factors for human health. However, only a few have quantified the specific impact of meteorological factors on mumps. A quantitative examination of the exposure–response relationship between meteorological factors and mumps is needed to provide new insights for multi-city analysis. Methods: The daily recorded number of mumps cases and meteorological data in 17 cities of Shandong Province from 2009 to 2017 were collected. A two-stage model was built to explore the relationship between meteorological factors and mumps. Results: A total of 104,685 cases of mumps were recorded from 2009 to 2017. After controlling for seasonality and long-term trends, the effect of low temperature on mumps was significant at the provincial level, with a cumulative RR of 1.035 (95%CI: 1.002–1.069) with a 1-day lagged effect. The proportion of primary and middle school students was determined as an effect modifier, which had a significant impact on mumps (Stat = 8.374, p = 0.039). There was heterogeneity in the combined effect of temperature on mumps (Q = 95.447, p = 0.000), and its size was I2 = 49.7%. Conclusions: We have identified a non-linear relationship between mumps and temperature in Shandong Province. In particular, low temperatures could bring more cases of mumps, with certain lagged effects. More public health measures should be taken to reduce the risks when temperatures are low, especially for cities with a high proportion of primary and secondary school students.
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Affiliation(s)
- Yuchen Zhu
- Department of Biostatistics, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan 250012, China; (Y.Z.); (D.Z.); (C.L.); (Y.J.); (K.S.); (T.L.)
| | - Dandan Zhang
- Department of Biostatistics, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan 250012, China; (Y.Z.); (D.Z.); (C.L.); (Y.J.); (K.S.); (T.L.)
- Heze Center for Disease Control and Prevention, Heze 274003, China
| | - Yuchen Hu
- MRC Clinical Trials Unit at UCL, Institute of Clinical Trials and Methodology, 90 High Holborn, London WC1V 6LJ, UK;
| | - Chunyu Li
- Department of Biostatistics, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan 250012, China; (Y.Z.); (D.Z.); (C.L.); (Y.J.); (K.S.); (T.L.)
| | - Yan Jia
- Department of Biostatistics, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan 250012, China; (Y.Z.); (D.Z.); (C.L.); (Y.J.); (K.S.); (T.L.)
| | - Kaili She
- Department of Biostatistics, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan 250012, China; (Y.Z.); (D.Z.); (C.L.); (Y.J.); (K.S.); (T.L.)
| | - Tingxuan Liu
- Department of Biostatistics, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan 250012, China; (Y.Z.); (D.Z.); (C.L.); (Y.J.); (K.S.); (T.L.)
| | - Qing Xu
- Shandong Center for Disease Control and Prevention, Jinan 250012, China;
| | - Ying Zhang
- School of Public Health, Faculty of Medicine and Health, University of Sydney, Camperdown, NSW 2006, Australia;
| | - Xiujun Li
- Department of Biostatistics, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan 250012, China; (Y.Z.); (D.Z.); (C.L.); (Y.J.); (K.S.); (T.L.)
- Correspondence: ; Tel.: +86-531-8838-2140
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Lin CY, Su SB, Peng CJ, Chen KT. The incidence of mumps in Taiwan and its association with the meteorological parameters: An observational study. Medicine (Baltimore) 2021; 100:e27267. [PMID: 34664880 PMCID: PMC8447993 DOI: 10.1097/md.0000000000027267] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Accepted: 08/31/2021] [Indexed: 11/27/2022] Open
Abstract
Mumps is an acute and common childhood disease caused by paramyxovirus. It has been reported that the occurrence of mumps is influenced by seasonality. However, the role of meteorological variables in the incidence of mumps remains unclear. The purpose of this study was to explore the relationship between meteorological factors and the incidence of mumps infection. Poisson regression analysis was used to study the relationship between weather variability and the incidence of mumps in Taiwan. Between 2012 and 2018, 5459 cases of mumps cases were reported to the Centers for Disease Control, Taiwan (Taiwan CDC). The occurrence of mumps virus infections revealed significant seasonality in the spring and summer seasons in Taiwan. The incidence of mumps virus infections began to increase at temperatures of 15°C and started to decline if the temperature was higher than 29°C (r2 = 0.387, P = .008). Similarly, the number of mumps cases began to increase at a relative humidity of 65% to 69% (r2 = 0.838, P < .029). The number of mumps cases was positively associated with temperature and relative humidity during the period preceding the infection. This study showed that the occurrence of mumps is significantly associated with increasing temperature and relative humidity in Taiwan. Therefore, these factors could be regarded as early warning signals and indicate the need to strengthen the intervention and prevention of mumps.
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Affiliation(s)
- Cheng-Yao Lin
- Division of Hematology-Oncology, Department of Internal Medicine, Chi-Mei Medical Center, Liouying, Tainan, Taiwan
- Department of Senior Welfare and Services, Southern Taiwan University of Science and Technology, Tainan, Taiwan
- Department of Environmental and Occupational Health, National Cheng Kung University, Tainan, Taiwan
| | - Shih-Bin Su
- Department of Occupational Medicine, Chi-Mei Medical Center, Tainan, Taiwan
| | - Cheau-Jane Peng
- Department of Senior Welfare and Services, Southern Taiwan University of Science and Technology, Tainan, Taiwan
| | - Kow-Tong Chen
- Department of Occupational Medicine, Tainan Municipal Hospital, Tainan, Taiwan
- Department of Public Health, College of Medicine, National Cheng Kung University, Tainan, Taiwan
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11
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Associations between Meteorological Factors and Reported Mumps Cases from 1999 to 2020 in Japan. EPIDEMIOLGIA (BASEL, SWITZERLAND) 2021; 2:162-178. [PMID: 36417181 PMCID: PMC9620933 DOI: 10.3390/epidemiologia2020013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 03/12/2021] [Accepted: 03/29/2021] [Indexed: 12/14/2022]
Abstract
The present study investigated associations between epidemiological mumps patterns and meteorological factors in Japan. We used mumps surveillance data and meteorological data from all 47 prefectures of Japan from 1999 to 2020. A time-series analysis incorporating spectral analysis and the least-squares method was adopted. In all power spectral densities for the 47 prefectures, spectral lines were observed at frequency positions corresponding to 1-year and 6-month cycles. Optimum least-squares fitting (LSF) curves calculated with the 1-year and 6-month cycles explained the underlying variation in the mumps data. The LSF curves reproduced bimodal and unimodal cycles that are clearly observed in northern and southern Japan, respectively. In investigating factors associated with the seasonality of mumps epidemics, we defined the contribution ratios of a 1-year cycle (Q1) and 6-month cycle (Q2) as the contributions of amplitudes of 1-year and 6-month cycles, respectively, to the entire amplitude of the time series data. Q1 and Q2 were significantly correlated with annual mean temperature. The vaccine coverage rate of a measles-mumps-rubella vaccine might not have affected the 1-year and 6-month modes of the time series data. The results of the study suggest an association between mean temperature and mumps epidemics in Japan.
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Lin S, Ruan S, Geng X, Song K, Cui L, Liu X, Zhang Y, Cao M, Zhang Y. Non-linear relationships and interactions of meteorological factors on mumps in Jinan, China. INTERNATIONAL JOURNAL OF BIOMETEOROLOGY 2021; 65:555-563. [PMID: 33180186 DOI: 10.1007/s00484-020-02048-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2020] [Revised: 10/02/2020] [Accepted: 11/03/2020] [Indexed: 06/11/2023]
Abstract
Although vaccination is available, mumps remains a public health concern in many countries including China. Previous studies have indicated the impact of meteorological factors and mumps, but findings vary across different regions with limited evidence to inform local public health responses. We aim to examine the impacts of meteorological variables on mumps in Jinan, a temperate city of China, and explore the interactions of temperature with humidity or wind speed. Weekly meteorological data and notified cases of mumps in Jinan were collected for 2014-2018. Regression analyses using the generalized additive model were performed with considerations of multicollinearity, lag effects, school holidays, long-term trend, and seasonality. A stratification model was applied to investigate the interaction. We found a non-linear relationship between weekly mean temperature and the number of cases. Between 1.2 and 24.5 °C, the excess risk (ER) of mumps for a 1 °C increase in weekly mean temperature was 3.08% (95% CI 1.32 to 4.87%) at 0-week lag. The lagged effects could last for 3 weeks. There were interactions between mean temperature and relative humidity or wind speed. The effect of mean temperature was enhanced in days with low relative humidity or high wind speed. This study suggests that temperature is positively associated with mumps cases with thresholds in the temperate city of China, and the effect can be modified by relative humidity and wind speed and is independent of vaccine coverage. Findings could be integrated into current early warning systems of mumps in order to protect people's health from the risk of changing climate.
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Affiliation(s)
- Shaoqian Lin
- Jinan Municipal Center for Disease Control and Prevention, 2 Weiliu Road, Huaiyin District, Jinan, 250021, China
| | - Shiman Ruan
- Jinan Municipal Center for Disease Control and Prevention, 2 Weiliu Road, Huaiyin District, Jinan, 250021, China
| | - Xingyi Geng
- Jinan Municipal Center for Disease Control and Prevention, 2 Weiliu Road, Huaiyin District, Jinan, 250021, China
| | - Kaijun Song
- Jinan Municipal Center for Disease Control and Prevention, 2 Weiliu Road, Huaiyin District, Jinan, 250021, China
| | - Liangliang Cui
- Jinan Municipal Center for Disease Control and Prevention, 2 Weiliu Road, Huaiyin District, Jinan, 250021, China
| | - Xiaoxue Liu
- Jinan Municipal Center for Disease Control and Prevention, 2 Weiliu Road, Huaiyin District, Jinan, 250021, China
| | - Yingjian Zhang
- Jinan Municipal Center for Disease Control and Prevention, 2 Weiliu Road, Huaiyin District, Jinan, 250021, China
| | - Meng Cao
- Jinan Municipal Center for Disease Control and Prevention, 2 Weiliu Road, Huaiyin District, Jinan, 250021, China
| | - Ying Zhang
- School of Public Health, Faculty of Medicine and Health, University of Sydney, Camperdown, NSW, 2006, Australia.
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Wang Y, Xu C, Ren J, Li Y, Wu W, Yao S. Use of meteorological parameters for forecasting scarlet fever morbidity in Tianjin, Northern China. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:7281-7294. [PMID: 33026621 DOI: 10.1007/s11356-020-11072-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Accepted: 09/30/2020] [Indexed: 06/11/2023]
Abstract
The scarlet fever incidence has increased drastically in recent years in China. However, the long-term relationship between climate variation and scarlet fever remains contradictory, and an early detection system is lacking. In this study, we aim to explore the potential long-term effects of variations in monthly climatic parameters on scarlet fever and to develop an early scarlet-fever detection tool. Data comprising monthly scarlet fever cases and monthly average climatic variables from 2004 to 2017 were retrieved from the Notifiable Infectious Disease Surveillance System and National Meteorological Science Center, respectively. We used a negative binomial multivariable regression to assess the long-term impacts of weather parameters on scarlet fever and then built a novel forecasting technique by integrating an autoregressive distributed lag (ARDL) method with a nonlinear autoregressive neural network (NARNN) based on the significant meteorological drivers. Scarlet fever was a seasonal disease that predominantly peaked in spring and winter. The regression results indicated that a 1 °C increment in the monthly average temperature and a 1-h increment in the monthly aggregate sunshine hours were associated with 17.578% (95% CI 7.674 to 28.393%) and 0.529% (95% CI 0.035 to 1.025%) increases in scarlet fever cases, respectively; a 1-hPa increase in the average atmospheric pressure at a 1-month lag was associated with 12.996% (95% CI 9.972 to 15.919%) decrements in scarlet fever cases. Based on the model evaluation criteria, the best-performing basic and combined approaches were ARDL(1,0,0,1) and ARDL(1,0,0,1)-NARNN(5, 22), respectively, and this hybrid approach comprised smaller performance measures in both the training and testing stages than those of the basic model. Climate variability has a significant long-term influence on scarlet fever. The ARDL-NARNN technique with the incorporation of meteorological drivers can be used to forecast the future epidemic trends of scarlet fever. These findings may be of great help for the prevention and control of scarlet fever.
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Affiliation(s)
- Yongbin Wang
- Department of Epidemiology and Health Statistics, School of Public Health, Xinxiang Medical University, No. 601 Jinsui road, Hongqi District, Xinxiang City, 453003, Henan Province, People's Republic of China.
| | - Chunjie Xu
- Department of Occupational and Environmental Health, School of Public Health, Capital Medical University, Beijing, 100069, People's Republic of China
| | - Jingchao Ren
- Department of Epidemiology and Health Statistics, School of Public Health, Xinxiang Medical University, No. 601 Jinsui road, Hongqi District, Xinxiang City, 453003, Henan Province, People's Republic of China
| | - Yuchun Li
- Department of Epidemiology and Health Statistics, School of Public Health, Xinxiang Medical University, No. 601 Jinsui road, Hongqi District, Xinxiang City, 453003, Henan Province, People's Republic of China
| | - Weidong Wu
- Department of Epidemiology and Health Statistics, School of Public Health, Xinxiang Medical University, No. 601 Jinsui road, Hongqi District, Xinxiang City, 453003, Henan Province, People's Republic of China
| | - Sanqiao Yao
- Department of Epidemiology and Health Statistics, School of Public Health, Xinxiang Medical University, No. 601 Jinsui road, Hongqi District, Xinxiang City, 453003, Henan Province, People's Republic of China
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Ma Y, Liu K, Hu W, Song S, Zhang S, Shao Z. Epidemiological Characteristics, Seasonal Dynamic Patterns, and Associations with Meteorological Factors of Rubella in Shaanxi Province, China, 2005-2018. Am J Trop Med Hyg 2020; 104:166-174. [PMID: 33241784 DOI: 10.4269/ajtmh.20-0585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Rubella occurs worldwide, causing approximately 100,000 cases annually of congenital rubella syndrome, leading to severe birth defects. Better targeting of public health interventions is needed to achieve rubella elimination goals. To that end, we measured the epidemiological characteristics and seasonal dynamic patterns of rubella and determined its association with meteorological factors in Shaanxi Province, China. Data on rubella cases in Shaanxi Province from 2005 to 2018 were obtained from the Chinese National Notifiable Disease Reporting System. The Morlet wavelet analysis was used to estimate temporal periodicity of rubella incidence. Mixed generalized additive models were used to measure associations between meteorological variables (temperature and relative humidity) and rubella incidence. A total of 17,185 rubella cases were reported in Shaanxi during the study period, for an annual incidence of 3.27 cases per 100,000 population. Interannual oscillations in rubella incidence of 0.8-1.4 years, 3.8-4.8 years, and 0.5 years were detected. Both temperature and relative humidity exhibited nonlinear associations with the incidence of rubella. The accumulative relative risk of transmission for the overall pooled estimates was maximized at a temperature of 0.23°C and relative humidity of 41.6%. This study found that seasonality and meteorological factors have impact on the transmission of rubella; public health interventions to eliminate rubella must consider periodic and seasonal fluctuations as well as meteorological factors.
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Affiliation(s)
- Yu Ma
- 1Department of Epidemiology, Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment, School of Public Health, Air Force Medical University, Xi'an, People's Republic of China.,2Shaanxi Provincial Center for Disease Control and Prevention, Xi'an, People's Republic of China
| | - Kun Liu
- 1Department of Epidemiology, Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment, School of Public Health, Air Force Medical University, Xi'an, People's Republic of China
| | - Weijun Hu
- 2Shaanxi Provincial Center for Disease Control and Prevention, Xi'an, People's Republic of China
| | - Shuxuan Song
- 1Department of Epidemiology, Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment, School of Public Health, Air Force Medical University, Xi'an, People's Republic of China
| | - Shaobai Zhang
- 2Shaanxi Provincial Center for Disease Control and Prevention, Xi'an, People's Republic of China
| | - Zhongjun Shao
- 1Department of Epidemiology, Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment, School of Public Health, Air Force Medical University, Xi'an, People's Republic of China
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Wang Y, Xu C, Ren J, Zhao Y, Li Y, Wang L, Yao S. The long-term effects of meteorological parameters on pertussis infections in Chongqing, China, 2004-2018. Sci Rep 2020; 10:17235. [PMID: 33057239 PMCID: PMC7560825 DOI: 10.1038/s41598-020-74363-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Accepted: 09/28/2020] [Indexed: 11/30/2022] Open
Abstract
Evidence on the long-term influence of climatic variables on pertussis is limited. This study aims to explore the long-term quantitative relationship between weather variability and pertussis. Data on the monthly number of pertussis cases and weather parameters in Chongqing in the period of 2004-2018 were collected. Then, we used a negative binomial multivariable regression model and cointegration testing to examine the association of variations in monthly meteorological parameters and pertussis. Descriptive statistics exhibited that the pertussis incidence rose from 0.251 per 100,000 people in 2004 to 3.661 per 100,000 persons in 2018, and pertussis was a seasonal illness, peaked in spring and summer. The results from the regression model that allowed for the long-term trends, seasonality, autoregression, and delayed effects after correcting for overdispersion showed that a 1 hPa increment in the delayed one-month air pressure contributed to a 3.559% (95% CI 0.746-6.293%) reduction in the monthly number of pertussis cases; a 10 mm increment in the monthly aggregate precipitation, a 1 °C increment in the monthly average temperature, and a 1 m/s increment in the monthly average wind velocity resulted in 3.641% (95% CI 0.960-6.330%), 19.496% (95% CI 2.368-39.490%), and 3.812 (95% CI 1.243-11.690)-fold increases in the monthly number of pertussis cases, respectively. The roles of the mentioned weather parameters in the transmission of pertussis were also evidenced by a sensitivity analysis. The cointegration testing suggested a significant value among variables. Climatic factors, particularly monthly temperature, precipitation, air pressure, and wind velocity, play a role in the transmission of pertussis. This finding will be of great help in understanding the epidemic trends of pertussis in the future, and weather variability should be taken into account in the prevention and control of pertussis.
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Affiliation(s)
- Yongbin Wang
- Department of Epidemiology and Health Statistics, School of Public Health, Xinxiang Medical University, Henan Province, Xinxiang, 453000, People's Republic of China.
| | - Chunjie Xu
- Department of Occupational and Environmental Health, School of Public Health, Capital Medical University, Beijing, People's Republic of China
| | - Jingchao Ren
- Department of Epidemiology and Health Statistics, School of Public Health, Xinxiang Medical University, Henan Province, Xinxiang, 453000, People's Republic of China
| | - Yingzheng Zhao
- Department of Epidemiology and Health Statistics, School of Public Health, Xinxiang Medical University, Henan Province, Xinxiang, 453000, People's Republic of China
| | - Yuchun Li
- Department of Epidemiology and Health Statistics, School of Public Health, Xinxiang Medical University, Henan Province, Xinxiang, 453000, People's Republic of China
| | - Lei Wang
- Center for Musculoskeletal Surgery, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität Zu Berlin and Berlin Institute of Health, Berlin, Germany
| | - Sanqiao Yao
- Department of Epidemiology and Health Statistics, School of Public Health, Xinxiang Medical University, Henan Province, Xinxiang, 453000, People's Republic of China
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16
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Zha WT, Li WT, Zhou N, Zhu JJ, Feng R, Li T, Du YB, Liu Y, Hong XQ, Lv Y. Effects of meteorological factors on the incidence of mumps and models for prediction, China. BMC Infect Dis 2020; 20:468. [PMID: 32615923 PMCID: PMC7331163 DOI: 10.1186/s12879-020-05180-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Accepted: 06/19/2020] [Indexed: 11/12/2023] Open
Abstract
BACKGROUND Mumps is an acute respiratory infectious disease with obvious regional and seasonal differences. Exploring the impact of climate factors on the incidence of mumps and predicting its incidence trend on this basis could effectively control the outbreak and epidemic of mumps. METHODS Considering the great differences of climate in the vast territory of China, this study divided the Chinese mainland into seven regions according to the administrative planning criteria, data of Mumps were collected from the China Disease Prevention and Control Information System, ARIMA model and ARIMAX model with meteorological factors were established to predict the incidence of mumps. RESULTS In this study, we found that precipitation, air pressure, temperature, and wind speed had an impact on the incidence of mumps in most regions of China and the incidence of mumps in the north and southwest China was more susceptible to climate factors. Considering meteorological factors, the average relative error of ARIMAX model was 10.87%, which was lower than ARIMA model (15.57%). CONCLUSIONS Meteorology factors were the important factors which can affect the incidence of mumps, ARIMAX model with meteorological factors could better simulate and predict the incidence of mumps in China, which has certain reference value for the prevention and control of mumps.
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Affiliation(s)
- Wen-Ting Zha
- Key Laboratory of Molecular Epidemiology of Hunan Province, School of Medicine, Hunan Normal University, Changsha, Hunan, People's Republic of China, 410081
| | - Wei-Tong Li
- Key Laboratory of Molecular Epidemiology of Hunan Province, School of Medicine, Hunan Normal University, Changsha, Hunan, People's Republic of China, 410081
| | - Nan Zhou
- Key Laboratory of Molecular Epidemiology of Hunan Province, School of Medicine, Hunan Normal University, Changsha, Hunan, People's Republic of China, 410081
| | - Jia-Jia Zhu
- Key Laboratory of Molecular Epidemiology of Hunan Province, School of Medicine, Hunan Normal University, Changsha, Hunan, People's Republic of China, 410081
| | - Ruihua Feng
- Key Laboratory of Molecular Epidemiology of Hunan Province, School of Medicine, Hunan Normal University, Changsha, Hunan, People's Republic of China, 410081
| | - Tong Li
- Key Laboratory of Molecular Epidemiology of Hunan Province, School of Medicine, Hunan Normal University, Changsha, Hunan, People's Republic of China, 410081
| | - Yan-Bing Du
- Key Laboratory of Molecular Epidemiology of Hunan Province, School of Medicine, Hunan Normal University, Changsha, Hunan, People's Republic of China, 410081
| | - Ying Liu
- Key Laboratory of Molecular Epidemiology of Hunan Province, School of Medicine, Hunan Normal University, Changsha, Hunan, People's Republic of China, 410081
| | - Xiu-Qin Hong
- Key Laboratory of Molecular Epidemiology of Hunan Province, School of Medicine, Hunan Normal University, Changsha, Hunan, People's Republic of China, 410081
| | - Yuan Lv
- Key Laboratory of Molecular Epidemiology of Hunan Province, School of Medicine, Hunan Normal University, Changsha, Hunan, People's Republic of China, 410081.
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The role of meteorological factors on mumps incidence among children in Guangzhou, Southern China. PLoS One 2020; 15:e0232273. [PMID: 32348370 PMCID: PMC7190132 DOI: 10.1371/journal.pone.0232273] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Accepted: 04/10/2020] [Indexed: 01/19/2023] Open
Abstract
Mumps, a common childhood disease, has a high incidence in Guangzhou city, China. It has been proven that mumps is influenced by seasonality. However, the role of meteorological factors among children is yet to be fully ascertained. This study explored the association between meteorological factors and the incidence of mumps among children in Guangzhou. Distributed lag nonlinear models were used to evaluate the correlation between meteorological factors and the incidence of mumps among children from 2014–2018. The nonlinear lag effects of some meteorological factors were detected. Mean temperature, atmospheric pressure, and relative humidity were positively correlated with mumps incidence, contrary to that of wind speed. Extreme effects of temperature, wind speed, atmospheric pressure, and relative humidity on the incidence of mumps among children in Guangzhou were evaluated in a subgroup analysis according to gender and age. Our preliminary results offered fundamental information to better understand the epidemic trends of mumps among children to develop an early warning system, and strengthen the intervention and prevention of mumps.
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Su SB, Chang HL, Chen KT. Current Status of Mumps Virus Infection: Epidemiology, Pathogenesis, and Vaccine. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17051686. [PMID: 32150969 PMCID: PMC7084951 DOI: 10.3390/ijerph17051686] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 02/28/2020] [Accepted: 02/29/2020] [Indexed: 01/03/2023]
Abstract
Mumps is an important childhood infectious disease caused by mumps virus (MuV). We reviewed the epidemiology, pathogenesis, and vaccine development of mumps. Previous studies were identified using the key words “mumps” and “epidemiology”, “pathogenesis” or “vaccine” in MEDLINE, PubMed, Embase, Web of Science, and Google Scholar. We excluded the articles that were not published in the English language, manuscripts without abstracts, and opinion articles from the review. The number of cases caused by MuV decreased steeply after the introduction of the mumps vaccine worldwide. In recent years, a global resurgence of mumps cases in developed countries and cases of aseptic meningitis caused by some mumps vaccine strains have renewed the importance of MuV infection worldwide. The performance of mumps vaccination has become an important issue for controlling mumps infections. Vaccine development and routine vaccination are still effective measures to globally reduce the incidence of mumps infections. During outbreaks, a third of MMR vaccine is recommended for groups of persons determined by public authorities.
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Affiliation(s)
- Shih-Bin Su
- Department of Occupational Medicine, Chi-Mei Medical Center, Tainan 710, Taiwan;
| | - Hsiao-Liang Chang
- Department of Surveillance, Centers for Disease Control, Taipei 100, Taiwan;
| | - Kow-Tong Chen
- Department of Occupational Medicine, Tainan Municipal Hospital (managed by Show Chwan Medical Care Corporation), Tainan 701, Taiwan
- Department of Public Health, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan
- Correspondence: ; Tel.: +886-6-2609926; Fax: +886-6-2606351
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Wu H, You E, Jiang C, Yang Y, Wang L, Niu Q, Lu X, Huang F. Effects of extreme meteorological factors on daily mumps cases in Hefei, China, during 2011-2016. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:4489-4501. [PMID: 31832956 DOI: 10.1007/s11356-019-07073-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2019] [Accepted: 11/14/2019] [Indexed: 06/10/2023]
Abstract
Mumps remains one of the worldwide major health problems over the past decade. Seasonal variations of mumps indicate that meteorological factors play an important role in the development of mumps, but few studies have investigated the relationship between extreme meteorological factors and the incidence of mumps. Daily mumps cases and meteorological factors in Hefei, China, from 2011 to 2016 were obtained. A generalized additive model combined with the distributed lag nonlinear model (DLNM) was used to quantify the risk of extreme meteorological factors on mumps incidence. Nonlinear relationships were observed among all meteorological factors and mumps incidence. We found that extremely low and high temperatures increased the risk of mumps. The relative risks (RRs) of the cumulative effects along 30 lag days were 2.02 (95%CI: 1.14-3.56) and 2.42 (95%CI: 1.37-4.24), respectively. Both short and long sunshine duration had negative correlation on mumps, with cumulative RRs of 0.64 (95%CI: 0.46-0.92) and 0.57 (95%CI: 0.44-0.74), respectively. In the subgroup analysis, males were found to be more sensitive to extreme weather, especially extreme temperatures and sunshine duration. This study suggests that extreme meteorological factors, especially extreme temperatures and sunshine duration, exert a significant impact on the incidence of mumps. When formulating and implementing effective strategies to the prevention and control of mumps, authorities should take the effect caused by extreme meteorological factors into consideration and pay more attention to susceptible populations, such as male children and teenagers.
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Affiliation(s)
- Huabing Wu
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Shushan District, Hefei, 230032, Anhui, China
| | - Enqing You
- Hefei Center for Disease Control and Prevention, 86 Luan Road, Luyang District, Hefei, 230061, Anhui, China
| | - Chunxiao Jiang
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Shushan District, Hefei, 230032, Anhui, China
| | - Yuwei Yang
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Shushan District, Hefei, 230032, Anhui, China
| | - Ling Wang
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Shushan District, Hefei, 230032, Anhui, China
| | - Qingshan Niu
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Shushan District, Hefei, 230032, Anhui, China
| | - Xuelei Lu
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Shushan District, Hefei, 230032, Anhui, China
| | - Fen Huang
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Shushan District, Hefei, 230032, Anhui, China.
- Central Laboratory of Preventive Medicine, School of Public Health, Anhui Medical University, 81 Meishan Road, Shushan District, Hefei, 230032, Anhui, China.
- Laboratory for environmental Toxicology, Anhui Medical University, 81 Meishan Road, Shushan District, Hefei, 230032, Anhui, China.
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20
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Nonlinear effect of wind velocity on mumps in Shenzhen, China, 2013-2016. Public Health 2019; 179:178-185. [PMID: 31863968 DOI: 10.1016/j.puhe.2019.10.023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 10/01/2019] [Accepted: 10/30/2019] [Indexed: 12/11/2022]
Abstract
OBJECTIVES Plenty of studies have shown that wind velocity has an influence on airborne diseases. There is, however, no consistent conclusion found on the relationship between wind velocity and mumps, and the regional heterogeneity has been largely neglected in previous studies. This study aims to explore the association between wind velocity and mumps in Shenzhen. STUDY DESIGN Ecological study. METHODS Sixteen subdistricts with the highest incidence rates of mumps were selected from Shenzhen city, and the multilevel distributed lag-nonlinear model was conducted to explore the relationship between mumps cases and wind velocity via the dlnm and lme4 packages of the software R 3.4.3. RESULTS In Shenzhen, a total of 16,997 mumps cases were reported between 2013 and 2016, and the means of daily rainfall, temperature, relative humidity, and 10 min wind velocity were 5.74 mm, 23.27 °C, 76.31% and 1.87 m/s, respectively. Obvious nonlinear correlation relationships of wind velocity and mumps risk were found, where a reverse-V curved shape was shown in the exposure dimension with the logRR value of mumps peaking at 2 m/s, and the type of nonlinear correlation varying with the levels of wind velocity in lag dimension with a peak at two lag weeks. CONCLUSIONS The lag and nonlinear association between wind velocity and number of mumps cases were examined, while there was no statistically significant associations for other meteorological factors accounting for the regional heterogeneity. Results from this study indicated that public health administrators could strengthen health education in schools on ventilation management to prevent and control mumps outbreaks.
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Zhang D, Guo Y, Rutherford S, Qi C, Wang X, Wang P, Zheng Z, Xu Q, Li X. The relationship between meteorological factors and mumps based on Boosted regression tree model. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 695:133758. [PMID: 31422317 DOI: 10.1016/j.scitotenv.2019.133758] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 07/29/2019] [Accepted: 08/02/2019] [Indexed: 06/10/2023]
Abstract
BACKGROUND Mumps remains a major global public health problem. Many studies have explored the relationship between meteorological factors and mumps, few have comprehensively explored such associations considering nonlinear relationship, delayed effects and collinearity in order to more accurately estimate them. This study aims to explore the relationship between meteorological factors and mumps in consideration of nonlinearity, delayed effects and collinearity. METHODS We collected daily reported mumps cases and meteorological data for Jining City, Shandong Province, China from 1 January 2007 to 31 December 2016. By building a Boosted regression tree model (BRT) for each day from lag 0days to the maximum lag time, the optimal lag time was selected and the relationship between meteorological factors and mumps was explored for this lag time. RESULTS From 2007 to 2016, a total of 15,064 cases of mumps were reported in Jining, with a sex ratio of 2.11:1. Cases were most prevalent in 5-9-year-olds (42.15%) followed by 10-14-year-olds (24.72%). The optimal lag time identified was 10days and the three meteorological factors that contributed the most to the risk of mumps were daily mean temperature, daily mean relative humidity and daily mean sunshine duration. Their relative contribution rates were 24.4%, 19.9% and 18.3%, respectively. The mean temperature and sunshine duration relationships approximated a U-shaped effect on the risk of mumps, with estimated thresholds of 5.5°C and 9.5h, respectively. The effect of relative humidity on mumps increased slightly and then decreased rapidly, with a threshold of 64%. CONCLUSIONS Our study indicates that daily mean temperature, relative humidity and sunshine duration were three significant meteorological factors associated with the incidence of mumps in Jining, China. Understanding the shape of relationships and their thresholds are critical for establishing early warning systems which are important tools in the prevention and control of mumps.
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Affiliation(s)
- Dandan Zhang
- Department of Biostatistics, School of Public Health, Shandong University, Jinan, China
| | - Yuming Guo
- Department of Epidemiology and Preventive Medicine, School of Public Health and Preventive Medicine, Monash University, Melbourne, Australia
| | | | - Chang Qi
- Department of Biostatistics, School of Public Health, Shandong University, Jinan, China
| | - Xu Wang
- Department of Biostatistics, School of Public Health, Shandong University, Jinan, China
| | - Peizhu Wang
- Department of Biostatistics, School of Public Health, Shandong University, Jinan, China
| | - Zhaolei Zheng
- Department of Biostatistics, School of Public Health, Shandong University, Jinan, China
| | - Qing Xu
- Shandong Center for Disease Control and Prevention, Jinan, China
| | - Xiujun Li
- Department of Biostatistics, School of Public Health, Shandong University, Jinan, China.
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Zhu H, Zhao H, Ou R, Xiang H, Hu L, Jing D, Sharma M, Ye M. Epidemiological Characteristics and Spatiotemporal Analysis of Mumps from 2004 to 2018 in Chongqing, China. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2019; 16:ijerph16173052. [PMID: 31443544 PMCID: PMC6747306 DOI: 10.3390/ijerph16173052] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/14/2019] [Revised: 08/17/2019] [Accepted: 08/19/2019] [Indexed: 01/16/2023]
Abstract
Mumps vaccines have been widely used in recent years, but frequent mumps outbreaks and re-emergence around the world have not stopped. Mumps still remains a serious public health problem with a high incidence in China. The status of mumps epidemics in Chongqing, the largest city in China, is still unclear. This study aimed to investigate the epidemiological and spatiotemporal characteristics of mumps and to provide a scientific basis for formulating effective strategies for its prevention and control. Surveillance data of mumps in Chongqing from January 2004 to December 2018 were collected from the National Notifiable Diseases Reporting Information System. A descriptive analysis was conducted to understand the epidemiological characteristics. Hot spots and spatiotemporal patterns were identified by performing a spatial autocorrelation analysis, a purely spatial scan, and a spatiotemporal scan at the county level based on geographic information systems. A total of 895,429 mumps cases were reported in Chongqing, with an annual average incidence of 36.34 per 100,000. The yearly incidence of mumps decreased markedly from 2004 to 2007, increased sharply from 2007 to 2011, and then tapered with a two-year cyclical peak after 2011. The onset of mumps showed an obvious bimodal seasonal distribution, with a higher peak of mumps observed from April to July of each year. Children aged 5–9 years old, males, and students were the prime high-risk groups. The spatial distribution of mumps did not exhibit significant global autocorrelation in most years, but local indicators of spatial autocorrelation and scan statistics detected high-incidence clusters which were mainly located in the midwestern, western, northeastern, and southwestern parts of Chongqing. The aggregation time frame detected by the purely temporal scan was between March 2009 and July 2013. The incidence of mumps in Chongqing from 2004 to 2018 featured significant spatial heterogeneity and spatiotemporal clustering. The findings of this study might assist public health agencies to develop real-time space monitoring, especially in the clustering regions and at peak periods; to improve immunization strategies for long-term prevention; and to deploy health resources reasonably.
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Affiliation(s)
- Hua Zhu
- Department of Epidemiology and Health Statistics, School of Public Health and Management, Chongqing Medical University, Chongqing 400016, China
| | - Han Zhao
- Chongqing Municipal Center for Disease Control and Prevention, Chongqing 400042, China
| | - Rong Ou
- Department of Medical Informatics Library, Chongqing Medical University, Chongqing 400016, China
| | - Haiyan Xiang
- Department of Epidemiology and Health Statistics, School of Public Health and Management, Chongqing Medical University, Chongqing 400016, China
| | - Ling Hu
- Department of Epidemiology and Health Statistics, School of Public Health and Management, Chongqing Medical University, Chongqing 400016, China
| | - Dan Jing
- Department of Epidemiology and Health Statistics, School of Public Health and Management, Chongqing Medical University, Chongqing 400016, China
| | - Manoj Sharma
- Department of Behavioral and Environmental Health, Jackson State University, Jackson, MS 39213, USA
| | - Mengliang Ye
- Department of Epidemiology and Health Statistics, School of Public Health and Management, Chongqing Medical University, Chongqing 400016, China.
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Chan EYY, Ho JY, Hung HHY, Liu S, Lam HCY. Health impact of climate change in cities of middle-income countries: the case of China. Br Med Bull 2019; 130:5-24. [PMID: 31070715 PMCID: PMC6587073 DOI: 10.1093/bmb/ldz011] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 01/31/2019] [Accepted: 04/23/2019] [Indexed: 12/13/2022]
Abstract
BACKGROUND This review examines the human health impact of climate change in China. Through reviewing available research findings under four major climate change phenomena, namely extreme temperature, altered rainfall pattern, rise of sea level and extreme weather events, relevant implications for other middle-income population with similar contexts will be synthesized. SOURCES OF DATA Sources of data included bilingual peer-reviewed articles published between 2000 and 2018 in PubMed, Google Scholar and China Academic Journals Full-text Database. AREAS OF AGREEMENT The impact of temperature on mortality outcomes was the most extensively studied, with the strongest cause-specific mortality risks between temperature and cardiovascular and respiratory mortality. The geographical focuses of the studies indicated variations in health risks and impacts of different climate change phenomena across the country. AREAS OF CONTROVERSY While rainfall-related studies predominantly focus on its impact on infectious and vector-borne diseases, consistent associations were not often found. GROWING POINTS Mental health outcomes of climate change had been gaining increasing attention, particularly in the context of extreme weather events. The number of projection studies on the long-term impact had been growing. AREAS TIMELY FOR DEVELOPING RESEARCH The lack of studies on the health implications of rising sea levels and on comorbidity and injury outcomes warrants immediate attention. Evidence is needed to understand health impacts on vulnerable populations living in growing urbanized cities and urban enclaves, in particular migrant workers. Location-specific climate-health outcome thresholds (such as temperature-mortality threshold) will be needed to support evidence-based clinical management plans and health impact mitigation strategies to protect vulnerable communities.
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Affiliation(s)
- Emily Y Y Chan
- Collaborating Centre for Oxford University and CUHK for Disaster and Medical Humanitarian Response (CCOUC), Division of Global Health and Humanitarian Medicine, The Jockey Club School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong, China
- Division of Global Health and Humanitarian Medicine, The Jockey Club School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong, China
- Nuffield Department of Medicine, University of Oxford, Oxford, UK
- François-Xavier Bagnoud Center for Health & Human Rights, Harvard University, Boston, MA, USA
| | - Janice Y Ho
- Division of Global Health and Humanitarian Medicine, The Jockey Club School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong, China
| | - Heidi H Y Hung
- Division of Global Health and Humanitarian Medicine, The Jockey Club School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong, China
| | - Sida Liu
- Division of Global Health and Humanitarian Medicine, The Jockey Club School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong, China
| | - Holly C Y Lam
- Collaborating Centre for Oxford University and CUHK for Disaster and Medical Humanitarian Response (CCOUC), Division of Global Health and Humanitarian Medicine, The Jockey Club School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong, China
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Hao Y, Wang RR, Han L, Wang H, Zhang X, Tang QL, Yan L, He J. Time series analysis of mumps and meteorological factors in Beijing, China. BMC Infect Dis 2019; 19:435. [PMID: 31101079 PMCID: PMC6525345 DOI: 10.1186/s12879-019-4011-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Accepted: 04/22/2019] [Indexed: 11/10/2022] Open
Abstract
Background Over the past decades there have been outbreaks of mumps in many countries, even in populations that were vaccinated. Some studies suggest that the incidence of mumps is related to meteorological changes, but the results of these studies vary in different regions. To date there is no reported study on correlations between mumps incidence and meteorological parameters in Beijing, China. Methods A time series analysis incorporating selected weather factors and the number of mumps cases from 1990 to 2012 in Beijing was performed. First, correlations between meteorological variables and the number of mumps cases were assessed. A seasonal autoregressive integrated moving average model with explanatory variables (SARIMAX) was then constructed to predict mumps cases. Results Mean temperature, rainfall, relative humidity, vapor pressure, and wind speed were significantly associated with mumps incidence. After constructing the SARIMAX model, mean temperature at lag 0 (β = 0.016, p < 0.05, 95% confidence interval 0.001 to 0.032) was positively associated with mumps incidence, while vapor pressure at lag 2 (β = ˗0.018, p < 0.05, 95% confidence interval ˗0.038 to ˗0.002) was negatively associated. SARIMAX (1, 1, 1) (0, 1, 1)12 with temperature at lag 0 was the best predictive construct. Conclusions The incidence of mumps in Beijing from 1990 to 2012 was significantly correlated with meteorological variables. Combining meteorological variables, a predictive SARIMAX model that could be used to preemptively estimate the incidence of mumps in Beijing was established. Electronic supplementary material The online version of this article (10.1186/s12879-019-4011-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Yu Hao
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, No. 11, Bei San Huan East Road, Chaoyang District, Beijing, 100029, China
| | - Ran-Ran Wang
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, No. 11, Bei San Huan East Road, Chaoyang District, Beijing, 100029, China
| | - Ling Han
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, No. 11, Bei San Huan East Road, Chaoyang District, Beijing, 100029, China
| | - Hong Wang
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, No. 11, Bei San Huan East Road, Chaoyang District, Beijing, 100029, China
| | - Xuan Zhang
- Hong Kong Chinese Medicine Clinical Study Centre, Chinese Clinical Trial Registry (Hong Kong Center), School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, China
| | - Qiao-Ling Tang
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, No. 11, Bei San Huan East Road, Chaoyang District, Beijing, 100029, China
| | - Long Yan
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, No. 11, Bei San Huan East Road, Chaoyang District, Beijing, 100029, China
| | - Juan He
- School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, No. 11, Bei San Huan East Road, Chaoyang District, Beijing, 100029, China.
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Guo Q, Dong Z, Zeng W, Ma W, Zhao D, Sun X, Gong S, Xiao J, Li T, Hu W. The effects of meteorological factors on influenza among children in Guangzhou, China. Influenza Other Respir Viruses 2018; 13:166-175. [PMID: 30407738 PMCID: PMC6379639 DOI: 10.1111/irv.12617] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 11/02/2018] [Accepted: 11/03/2018] [Indexed: 11/28/2022] Open
Abstract
Background Influenza seriously affects the health of children, yet little evidence is available on the association between meteorological factors and the occurrence of influenza among children in subtropical regions. The current study aimed to explore the effects of meteorological factors on influenza among children in Guangzhou, a subtropical city in China. Methods The distributed lag nonlinear model (DLNM) was used to assess the effects of meteorological factors on children influenza occurrence in Guangzhou, China. Daily number of influenza cases among children aged 0‐17 years from 2013 to 2017 were obtained from the National Information System for Disease Control and Prevention. Results Mean temperature, relative humidity, and atmospheric pressure were associated with influenza cases. The relative risks (RRs) increased as temperature fell below 20°C. The relationship between relative humidity and influenza cases could be described with a U‐shaped curve, and the RRs increased if relative humidity was lower than 50% or higher than 80%. The risk of influenza increased with rising atmospheric pressure with 1005 hPa as the break point. The cold effect, humid effect, dry effect, high‐pressure effect, and low‐pressure effect showed statistical significance both in female and male. The cold effect increased with age. The humid‐effect affects all age ranges of children, but dry effect mainly affected 4‐14 years old. High‐pressure effect mainly affected the 0‐3 years old, whereas low‐pressure effect protected preschool children aged 0‐6 years old. Conclusion Mean temperature, relative humidity, and atmospheric pressure might be important predictors of the influenza occurrence among children in Guangzhou.
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Affiliation(s)
- Qiaozhi Guo
- Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Zhiqiang Dong
- Guangzhou Center for Disease Control and Prevention, Guangzhou, China
| | - Weilin Zeng
- Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China
| | - Wenjun Ma
- Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China
| | - Danyang Zhao
- Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Xin Sun
- Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Sitang Gong
- Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Jianpeng Xiao
- Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China
| | - Tiegang Li
- Guangzhou Center for Disease Control and Prevention, Guangzhou, China
| | - Wensui Hu
- Guangzhou Center for Disease Control and Prevention, Guangzhou, China
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26
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Yu G, Yang R, Yu D, Cai J, Tang J, Zhai W, Wei Y, Chen S, Chen Q, Zhong G, Qin J. Impact of meteorological factors on mumps and potential effect modifiers: An analysis of 10 cities in Guangxi, Southern China. ENVIRONMENTAL RESEARCH 2018; 166:577-587. [PMID: 29966878 DOI: 10.1016/j.envres.2018.06.047] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Revised: 06/19/2018] [Accepted: 06/21/2018] [Indexed: 05/04/2023]
Abstract
BACKGROUND In the current context of global climate change, understanding the impact of climate on respiratory infectious diseases such as mumps and the potential modified factors is crucial, especially in developing countries. However, research on the climate-related incidence of mumps is rare, inconsistent and mainly limited to a single city or region. METHODS Daily mumps cases and meteorological variables of 10 cities in Guangxi, Southern China were collected for 2005-2017. Two-stage analyses were performed to assess the relationship between meteorological factors and mumps incidence during two time-periods: 2005-2012 and 2013-2017, separately. First, a Poisson regression model that allows over-dispersion was used to estimate the city-specific climate-related morbidity after controlling for temporal trends, day of week, and national statutory holidays. Then, we used a multivariate meta-analytical model to pool the city-specific effect estimates and conducted subgroup analyses. Multivariate meta-regression was applied to detect potential effect modifiers. RESULTS Non-linear relationships were observed among mean temperature, wind speed, and mumps incidence in 2005-2012. The impact of high temperature on mumps incidence was short and rapid, whereas the impact of low temperature was long and slow. The total cumulative relative risk (RR) associated with hot temperature was 1.18 [95% Confidence Interval (CI): 0.93, 1.48], which was calculated by comparing the incidence of mumps above the 90th percentile of temperature with its incidence at the median temperature at lag of 0-30 days. Meanwhile, the RR associated with cold temperature was calculated to be 1.50 (95% CI: 1.08, 2.10) by comparing the incidence of mumps below the 10th percentile of temperature with its incidence at the median temperature. Similarly, the RRs associated with windless and windy conditions for the total population were 1.23 (95% CI: 1.04, 1.46) and 0.83 (95% CI: 0.67, 1.02), respectively. Effects based on extreme temperature and wind speed conditions were more prominent in males than in females. Compared with children and adults, adolescents (5-14 years old) were more sensitive to extreme weather conditions. Geographical latitude, Population density, GDP per capita, Number of health institutions, Highly educated population and Inoculation rate were considered the most likely associated modifiers. In addition, the correlation between meteorological factors and the incidence of mumps and modification of socioeconomic factors after 2013 showed similar curves compared with results in 2005-2012, but the cumulative effect was not statistically significant. CONCLUSIONS Meteorological factors, such as temperature and wind speed, exert a significant impact on the incidence of mumps. The relationship varies depending on gender and age. Socioeconomic factors such as vaccination, GDP, geographical latitude, etc. may substantially affect the weather-related mumps incidence.
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Affiliation(s)
- Guoqi Yu
- Department of Environmental and Occupational Health, Guangxi Medical University, Shuangyong Road 22, Nanning, Guangxi Zhuang Autonomous Region, China
| | - Rencong Yang
- Guangxi Center for Disease Control and Prevention, Institute of Vaccination, Nanning, Guangxi Zhuang Autonomous Region, China
| | - Dongmei Yu
- Department of Environmental and Occupational Health, Guangxi Medical University, Shuangyong Road 22, Nanning, Guangxi Zhuang Autonomous Region, China
| | - Jiansheng Cai
- Department of Environmental and Occupational Health, Guangxi Medical University, Shuangyong Road 22, Nanning, Guangxi Zhuang Autonomous Region, China
| | - Jiexia Tang
- Department of Environmental and Occupational Health, Guangxi Medical University, Shuangyong Road 22, Nanning, Guangxi Zhuang Autonomous Region, China
| | - Wenwen Zhai
- Department of Health Related Social and Behavioral Science, West China School of Public Health, Sichuan University, Chengdu, Sichuan, China
| | - Yi Wei
- Department of Environmental and Occupational Health, Guangxi Medical University, Shuangyong Road 22, Nanning, Guangxi Zhuang Autonomous Region, China
| | - Shiyi Chen
- Department of Environmental and Occupational Health, Guangxi Medical University, Shuangyong Road 22, Nanning, Guangxi Zhuang Autonomous Region, China
| | - Quanhui Chen
- Department of Environmental and Occupational Health, Guangxi Medical University, Shuangyong Road 22, Nanning, Guangxi Zhuang Autonomous Region, China
| | - Ge Zhong
- Guangxi Center for Disease Control and Prevention, Institute of Vaccination, Nanning, Guangxi Zhuang Autonomous Region, China.
| | - Jian Qin
- Department of Environmental and Occupational Health, Guangxi Medical University, Shuangyong Road 22, Nanning, Guangxi Zhuang Autonomous Region, China; Guangxi Colleges and Universities Key Laboratory of Prevention and Control of Highly Prevalent Diseases, Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region, China.
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Yu G, Yang R, Wei Y, Yu D, Zhai W, Cai J, Long B, Chen S, Tang J, Zhong G, Qin J. Spatial, temporal, and spatiotemporal analysis of mumps in Guangxi Province, China, 2005-2016. BMC Infect Dis 2018; 18:360. [PMID: 30068308 PMCID: PMC6090846 DOI: 10.1186/s12879-018-3240-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Accepted: 07/05/2018] [Indexed: 12/27/2022] Open
Abstract
Background The resurgence of mumps around the world occurs frequently in recent years. As the country with the largest number of cases in the world, the status of mumps epidemics in China is not yet clear. This study, taking the relatively serious epidemic province of Guangxi as the example, aimed to examine the spatiotemporal pattern and epidemiological characteristics of mumps, and provide a scientific basis for the effective control of this disease and formulation of related health policies. Methods Geographic information system (GIS)-based spatiotemporal analyses, including spatial autocorrelation analysis, Kulldorff’s purely spatial and space-time scan statistics, were applied to detect the location and extent of mumps high-risk areas. Spatial empirical Bayesian (SEB) was performed to smoothen the rate for eliminating the instability of small-area data. Results A total of 208,470 cases were reported during 2005 and 2016 in Guangxi. Despite the fluctuations in 2006 and 2011, the overall mumps epidemic continued to decline. Bimodal seasonal distribution (mainly from April to July) were found and students aged 5–9 years were high-incidence groups. Though results of the global spatial autocorrelation based on the annual incidence largely varied, the spatial distribution of the average annual incidence of mumps was nonrandom with the significant Moran’s I. Spatial cluster analysis detected high-value clusters, mainly located in the western, northern and central parts of Guangxi. Spatiotemporal scan statistics identified almost the same high-risk areas, and the aggregation time was mainly concentrated in 2009–2012. Conclusion The incidence of mumps in Guangxi exhibited spatial heterogeneity in 2005–2016. Several spatial and spatiotemporal clusters were identified in this study, which might assist the local government to develop targeted health strategies, allocate health resources reasonably and increase the efficiency of disease prevention. Electronic supplementary material The online version of this article (10.1186/s12879-018-3240-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Guoqi Yu
- Department of Environmental and Occupational Health, Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region, China
| | - Rencong Yang
- Guangxi Center for Disease Control and Prevention, Institute of Vaccination, Nanning, Guangxi Zhuang Autonomous Region, China
| | - Yi Wei
- Department of Environmental and Occupational Health, Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region, China
| | - Dongmei Yu
- Department of Environmental and Occupational Health, Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region, China
| | - Wenwen Zhai
- Department of Health Related Social and Behavioral Science, West China School of Public Health, Sichuan University, Chengdu, Sichuan, China
| | - Jiansheng Cai
- Department of Environmental and Occupational Health, Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region, China
| | - Bingshuang Long
- Department of Environmental and Occupational Health, Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region, China
| | - Shiyi Chen
- Department of Environmental and Occupational Health, Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region, China
| | - Jiexia Tang
- Department of Environmental and Occupational Health, Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region, China
| | - Ge Zhong
- Guangxi Center for Disease Control and Prevention, Institute of Vaccination, Nanning, Guangxi Zhuang Autonomous Region, China.
| | - Jian Qin
- Department of Environmental and Occupational Health, Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region, China.
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Hu W, Li Y, Han W, Xue L, Zhang W, Ma W, Bi P. Meteorological factors and the incidence of mumps in Fujian Province, China, 2005-2013: Non-linear effects. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 619-620:1286-1298. [PMID: 29734606 PMCID: PMC7112015 DOI: 10.1016/j.scitotenv.2017.11.108] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Revised: 11/09/2017] [Accepted: 11/09/2017] [Indexed: 04/14/2023]
Abstract
BACKGROUND Mumps is still an important public health issue in the world with several recent outbreaks. The seasonable distribution of the disease suggested that meteorological factors may influence the incidence of mumps. The aim of this study was to explore the possible association between meteorological factors and the incidence of mumps, and to provide scientific evidence to relevant health authorities for the disease control and prevention. METHODS We obtained the data of mumps cases and daily meteorological factors in Fujian Province in Eastern China over the period of 2005-2013. Using distributed lag non-linear model (DLNM) approach, we assessed the relationship between the meteorological factors and mumps incidence. RESULTS The effects of meteorological factors on the mumps incidence were all non-linear. Compared with the lowest risk values, the upper level of precipitation, atmospheric pressure and relative humidity could increase the risk of mumps, whereas the low level of wind velocity, temperature, diurnal temperature range and sunshine duration may also increase the risk. Moderate atmospheric pressure and low wind velocity had larger cumulative effects within 30lagdays and the relative risks were 10.02 (95%CI: 2.47-40.71) and 12.45 (95%CI: 1.40-110.78). For temperature, the cumulative effect within 30lagdays of minimum temperature was higher than that from maximum temperature in most populations. The cumulative effects of minimum temperature for males, children aged 10-14 and students were higher than those in other populations. CONCLUSIONS Meteorological factors, especially temperature and wind velocity, should be taken into consideration in the prevention and warning of possible mumps epidemic. Special attention should be paid to the vulnerable populations, such as teenagers and young adults.
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Affiliation(s)
- Wenqi Hu
- Department of Epidemiology, School of Public Health, Shandong University, 44 West Wenhua Road, Jinan, Shandong 250012, PR China
| | - Yuying Li
- Department of Epidemiology, School of Public Health, Shandong University, 44 West Wenhua Road, Jinan, Shandong 250012, PR China
| | - Weixiao Han
- Department of Epidemiology, School of Public Health, Shandong University, 44 West Wenhua Road, Jinan, Shandong 250012, PR China
| | - Li Xue
- Department of Epidemiology, School of Public Health, Shandong University, 44 West Wenhua Road, Jinan, Shandong 250012, PR China
| | - Wenchao Zhang
- Department of Epidemiology, School of Public Health, Shandong University, 44 West Wenhua Road, Jinan, Shandong 250012, PR China
| | - Wei Ma
- Department of Epidemiology, School of Public Health, Shandong University, 44 West Wenhua Road, Jinan, Shandong 250012, PR China; Climate Change and Health Center, Shandong University, 44 West Wenhua Road, Jinan, Shandong 250012, PR China.
| | - Peng Bi
- School of Public Health, The University of Adelaide, Level 8, Hughes Building, North Terrace Campus, Adelaide, SA 5005, Australia.
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Zhang Y, Zhao Q, Zhang W, Li S, Chen G, Han Z, Guo Y. Are hospital emergency department visits due to dog bites associated with ambient temperature? A time-series study in Beijing, China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 598:71-76. [PMID: 28437773 DOI: 10.1016/j.scitotenv.2017.04.112] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Revised: 03/08/2017] [Accepted: 04/14/2017] [Indexed: 04/15/2023]
Abstract
BACKGROUND It is well documented that suboptimal ambient temperature is associated with cardiovascular and respiratory diseases. However, no study has examined the relation between temperature and dog bites. OBJECTIVES To study the association between ambient temperature and daily hospital emergency department visits due to dog bites (EDVDBs) in Beijing, China; and to explore whether the temperature-EDVDB association varies by sex and age. METHODS Daily EDVDBs were collected from a hospital appointed for dog bites in Beijing during 2012-2014. A quasi-Poisson regression with distributed lag non-linear model (DLNM) was employed to estimate the impact of temperature on daily EDVDBs. Stratified analysis was performed to examine the temperature-EDVDB association by sex and age-groups. Sensitivity analysis was performed to check the robustness of the results by adjusting other meteorological variables and air pollutants. RESULTS A total of 42,481 EDVDBs were collected, with daily cases ranged from 15 to 71. The association between temperature and EDVDBs was U-shaped, with extreme cold temperature showing a weaker, delayed and shorter effect on the risk of dog bites while the effect of extreme hot temperature being stronger, more immediate and lasting longer. Cold temperature had a greater impact on female whereas male was more sensitive to hot temperature. The temperature-EDVDB association was unapparent in the 15-21years group. The cold effect was only significant in the 0-14years group whereas all age-groups suffered from the similar heat effect except those aged 22-45years. Adjusting other meteorological variables and air pollutants did not change the results. CONCLUSIONS The impact of temperature on EDVDBs is U-shaped in Beijing, China which varies by sex and age. The temperature effect is independent from other meteorological variables and air pollutants.
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Affiliation(s)
- Yongming Zhang
- Department of Respiratory and Critical Care Medicine, China-Japan Friendship Hospital, Beijing 100029, China
| | - Qi Zhao
- School of Public Health, The University of Queensland, Brisbane 4006, Australia
| | - Wenyi Zhang
- Center for Disease Surveillance & Research, Institute of Disease Control and Prevention, Academy of Military Medical Science, Beijing 102206, China
| | - Shanshan Li
- School of Public Health, The University of Queensland, Brisbane 4006, Australia; Department of Epidemiology and Preventive Medicine, School of Public Health and Preventive Medicine, Monash University, Melbourne 3004, Australia
| | - Gongbo Chen
- School of Public Health, The University of Queensland, Brisbane 4006, Australia
| | - Zhihai Han
- Navy General Hospital of PLA, Beijing 100048, China.
| | - Yuming Guo
- School of Public Health, The University of Queensland, Brisbane 4006, Australia; Department of Epidemiology and Preventive Medicine, School of Public Health and Preventive Medicine, Monash University, Melbourne 3004, Australia.
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Bai X, Hu B, Yan Q, Luo T, Qu B, Jiang N, Liu J, Zhu Y. Effects of meteorological factors on the incidence of meningococcal meningitis. Afr Health Sci 2017; 17:820-826. [PMID: 29085410 PMCID: PMC5656194 DOI: 10.4314/ahs.v17i3.25] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND AND OBJECTIVES Substantial climate changes have led to the emergence and re-emergence of various infectious diseases worldwide, presenting an imperative need to explore the effects of meteorological factors on serious contagious disease incidences such as that of meningococcal meningitis (MCM). METHODS The incidences of MCM and meteorology data between 1981 and 2010 were obtained from Chaoyang city. Structure Equation Modeling was used to analyze the relationships between meteorological factors and the incidence of MCM, using the LISREL software. RESULTS The SEM results showed that Adjusted Goodness of Fit Index (AGFI) = 0.30, Goodness of Fit Index (GFI) = 0.63, and Root Mean Square Error of Approximation (RMSEA) = 0.31. Humidity and temperature both had negative correlations with MCM incidence, with factor loads of -0.32 and -0.43, while sunshine was positively correlated with a factor load of 0.42. For specific observable variables, average air pressure, average evaporation, average air temperature, and average ground temperature exerted stronger influence, with item loads between observable variables and MCM incidence being -0.42, 0.34, -0.32, and -0.32 respectively. CONCLUSION Public health institutions should pay more attention to the meteorological variables of humidity, sunshine, and temperature in prospective MCM control and prevention.
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Affiliation(s)
- Xue Bai
- School of Public Health, China Medical University, Shenyang, Liaoning Province, 110013, China
| | - Bingxue Hu
- School of Public Health, China Medical University, Shenyang, Liaoning Province, 110013, China
| | - Qi Yan
- School of Public Health, China Medical University, Shenyang, Liaoning Province, 110013, China
| | - Ting Luo
- School of Public Health, China Medical University, Shenyang, Liaoning Province, 110013, China
| | - Bo Qu
- School of Public Health, China Medical University, Shenyang, Liaoning Province, 110013, China
| | - Nan Jiang
- School of Public Health, China Medical University, Shenyang, Liaoning Province, 110013, China
| | - Jie Liu
- School of Public Health, China Medical University, Shenyang, Liaoning Province, 110013, China
| | - Yaxin Zhu
- School of Public Health, China Medical University, Shenyang, Liaoning Province, 110013, China
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Li R, Cheng S, Luo C, Rutherford S, Cao J, Xu Q, Liu X, Liu Y, Xue F, Xu Q, Li X. Epidemiological Characteristics and Spatial-Temporal Clusters of Mumps in Shandong Province, China, 2005-2014. Sci Rep 2017; 7:46328. [PMID: 28397866 PMCID: PMC5387744 DOI: 10.1038/srep46328] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Accepted: 03/15/2017] [Indexed: 01/04/2023] Open
Abstract
Mumps presents a serious threat to public health in China. We conducted a descriptive analysis to identify the epidemiological characteristics of mumps in Shandong Province. Spatial autocorrelation and space-time scan analyses were utilized to detect spatial-temporal clusters. From 2005 to 2014, 115745 mumps cases were reported in Shandong, with an average male-to-female ratio of 1.94. Mumps occurred mostly in spring (32.17% of all reported cases) and in children aged 5 to 9 (40.79% of all reported cases). The Moran’s I test was significant and local indicators of spatial autocorrelation (LISA) analysis revealed significant spatial clusters with high incidence. The results showed that the mid-west of Shandong Province and some coastal regions (Qingdao City and Weihai City) were high-risk areas, particularly in the center of the Jining City and the junction of Dongying City, Binzhou City and Zibo City. The results could assist local and national public health agencies in formulating better public health strategic planning and resource allocation.
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Affiliation(s)
- Runzi Li
- Department of Epidemiology and Biostatistics, School of Public Health, Shandong University, Jinan 250012, Shandong, China
| | - Shenghui Cheng
- Visual Analytics and Imaging Lab, Computer Science Department, Stony Brook University, New York 10024, America
| | - Cheng Luo
- Department of Epidemiology and Biostatistics, School of Public Health, Shandong University, Jinan 250012, Shandong, China
| | - Shannon Rutherford
- School of Medicine &Centre for Environment and Population Health, Griffith University, Queensland 4218, Australia
| | - Jin Cao
- Department of Epidemiology and Biostatistics, School of Public Health, Shandong University, Jinan 250012, Shandong, China
| | - Qinqin Xu
- Department of Epidemiology and Biostatistics, School of Public Health, Shandong University, Jinan 250012, Shandong, China
| | - Xiaodong Liu
- Shandong Center for Disease Control and Prevention, Jinan 250012, Shandong, China
| | - Yanxun Liu
- Department of Epidemiology and Biostatistics, School of Public Health, Shandong University, Jinan 250012, Shandong, China
| | - Fuzhong Xue
- Department of Epidemiology and Biostatistics, School of Public Health, Shandong University, Jinan 250012, Shandong, China
| | - Qing Xu
- Shandong Center for Disease Control and Prevention, Jinan 250012, Shandong, China
| | - Xiujun Li
- Department of Epidemiology and Biostatistics, School of Public Health, Shandong University, Jinan 250012, Shandong, China
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Li R, Lin H, Liang Y, Zhang T, Luo C, Jiang Z, Xu Q, Xue F, Liu Y, Li X. The short-term association between meteorological factors and mumps in Jining, China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 568:1069-1075. [PMID: 27353959 DOI: 10.1016/j.scitotenv.2016.06.158] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Revised: 06/20/2016] [Accepted: 06/20/2016] [Indexed: 04/15/2023]
Abstract
BACKGROUND An increasing trend of the incidence of mumps has been observed in a few developing countries in recent years, presenting a major threat to children's health. A few studies have examined the relationship between meteorological factors and mumps with inconsistent findings. METHODS The daily data of meteorological variables and mumps from 2009 to 2013 were obtained from Jining, a temperate inland city of China. A generalized additive model was used to quantify the association between meteorological factors and mumps based on the exposure-response relationship. RESULTS A total of 8520 mumps cases were included in this study. We found a nonlinear relationship of daily mean temperature, sunshine duration and relative humidity with mumps, with an approximately linear association for mean temperature above 4°C (excess risk (ER) for 1°C increase was 2.72%, 95% confidence interval (CI): 2.38%, 3.05% on the current day), for relative humidity above 54%, the ER for 1% increase was -1.86% (95% CI: -2.06%, -1.65%) at lag day 14; and for sunshine duration higher than 5h/d, the ER for per 1h/d increase was12.91% (95% CI: 11.38%, 14.47%) at lag day 1. While we found linear effects for daily wind speed (ER: 2.98%, 95% CI: 2.71%, 3.26% at lag day 13). CONCLUSIONS This study suggests that meteorological factors might be important predictors of incidence of mumps, and should be considered in its control and prevention.
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Affiliation(s)
- Runzi Li
- Department of Biostatistics, School of Public Health, Shandong University, Jinan, Shandong, China
| | - Hualiang Lin
- Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China
| | - Yumin Liang
- Jining Center for Disease Control and Prevention, Jining, Shandong, China
| | - Tao Zhang
- Department of Biostatistics, School of Public Health, Shandong University, Jinan, Shandong, China
| | - Cheng Luo
- Department of Biostatistics, School of Public Health, Shandong University, Jinan, Shandong, China
| | - Zheng Jiang
- Department of Biostatistics, School of Public Health, Shandong University, Jinan, Shandong, China
| | - Qinqin Xu
- Department of Biostatistics, School of Public Health, Shandong University, Jinan, Shandong, China
| | - Fuzhong Xue
- Department of Biostatistics, School of Public Health, Shandong University, Jinan, Shandong, China
| | - Yanxun Liu
- Department of Biostatistics, School of Public Health, Shandong University, Jinan, Shandong, China
| | - Xiujun Li
- Department of Biostatistics, School of Public Health, Shandong University, Jinan, Shandong, China.
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Ho YC, Su BH, Su HJ, Chang HL, Lin CY, Chen H, Chen KT. The association between the incidence of mumps and meteorological parameters in Taiwan. Hum Vaccin Immunother 2016; 11:1406-12. [PMID: 25891825 DOI: 10.1080/21645515.2015.1029687] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
Mumps is caused by a paramyxovirus. It is an acute, but mild infectious disease. However, approximately 10% of patients with mumps can develop severe meningoencephalitis, disability, and death. Seasonal patterns in mumps vary across countries, but the reasons for this phenomenon remain unclear. The aim of this study was to assess the role of meteorological factors on mumps infection. We investigated the relationships between weather variability and the incidence of mumps in Taiwan using a Poisson regression analysis and case-crossover methodology. Between 2006 and 2011, 6,612 cases of mumps were reported to the Centers for Disease Control, Taiwan (Taiwan CDC). The incidence of mumps showed a significant seasonality in summertime (for oscillation, P < 0.001). The number of mumps started to increase at temperatures of 20°C (r(2) = 0.73, P < 0.001), and the case count of mumps began to decline when the temperatures were higher than approximately 25°C (r(2) = 0.24, p = 0.04), producing an inverted V-shaped relationship. Similarly, the number of mumps began to increase at a vapor pressure of 5-9 hPa (r(2) = 0.87, P < 0.005) and decreased at a vapor pressure higher than 25-29 hPa (r(2) = 0.21, p = 0.05). The number of mumps cases was positively associated with temperature and vapor pressure in the preceding period of the infection. In conclusion, this study showed that the occurrence of mumps is significantly associated with increasing temperature and vapor pressure in Taiwan. Therefore, these factors could be regarded as warning signals indicating the need to implement preventive measures.
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Affiliation(s)
- Yi-Chien Ho
- a Department of Cosmetic Applications and Management/Holistic Education Center; Cardinal Tien Junior College of Healthcare and Management ; Taipei , Taiwan
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