Abstract
Previous studies indicate that the incidence of bacillary dysentery is closely related to meteorological factors. However, the impact of temperature and the spatial heterogeneity of the disease in regions of unbalanced socioeconomic development remains unclear. Therefore, this research collected data for 29,639 daily bacillary dysentery cases in children under 5 years of age, as well as the meteorological variables from China’s Beijing–Tianjin–Hebei region, to analyze the spatial pattern of bacillary dysentery and reveal its nonlinear association with temperature. The SatScan method was employed first, to detect the spatial heterogeneity of the disease risk, and then the distributed lag nonlinear model (DLNM) was used to analyze the relationships between the daily minimum, mean, and maximum temperatures and bacillary dysentery in the stratified heterogeneous regions. The results indicated that bacillary dysentery incidence presented statistically significant spatial heterogeneity. The area of highest risk was found to be Beijing and its neighboring regions, which have high population densities. There was also a positive association between bacillary dysentery and temperature. Hotter temperatures were accompanied by higher relative risks. In the most likely spatial cluster region, the excess risk (ER) values for a 1°C rise in minimum, mean, and maximum temperatures above the median were 4.65%, 11.30%, and 19.21%, respectively. The effect of temperature on bacillary dysentery peaked at a lag of 3 to 4 days. The findings of this study will aid risk assessments and early warning systems for bacillary dysentery.
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Abbreviations
- DLNM:
-
distributed lag nonlinear models
- RR:
-
relative risk
- ER:
-
excess risk
- LLR:
-
log-likelihood ratios
- AIC:
-
Akaike’s information criterion
- DOW:
-
day of the week
- CI:
-
confidence interval
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Acknowledgements
This study was supported by the following grants: National Science Foundation of China (41901331; 41971357), Henan Postdoctoral Science Foundation (CJ3050A0670196), and a grant from State Key Laboratory of Resources and Environmental Information System: Innovation Project of LREIS (O88RA205YA, O88RA200YA). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
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LW and CDX participated in the design of the paper and analyses of the data and drafted the manuscript. XGX and QJJ designed the paper and interpreted the findings. CZZ assisted in data analysis.
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Wang, L., Xu, C., Xiao, G. et al. Spatial heterogeneity of bacillary dysentery and the impact of temperature in the Beijing–Tianjin–Hebei region of China. Int J Biometeorol 65, 1919–1927 (2021). https://doi.org/10.1007/s00484-021-02148-3
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DOI: https://doi.org/10.1007/s00484-021-02148-3