Abstract
Background: Diarrhea remains a major threat to developing countries like China. Improved water, sanitation, and hygiene (WASH) have been known as cost-effective ways for reducing the morbidity of diarrhea. Primary healthcare institutions in China have been playing pivotal roles in the maintenance of WASH facilities as well as providing health education intended for improving residents’ appropriateness and safety in using those facilities. In this study, we aimed to explore the association between the number of primary healthcare workers and diarrhea morbidity at community levels in order to provide evidence-based implications for optimizing primary healthcare resource allocations.Methods: We collected annually time series of diarrhea morbidity, the number of primary healthcare workers, and relevant data of 4,321 communities in Sichuan Province with 83.41 million residents, China, from 2017 to 2019. The global and local Moran’s I were calculated to detect the spatial clustering of diarrhea morbidity each year as well as to identify areas where increased primary healthcare resources should be allocated. The spatial lag fixed effects panel data model was adopted to explore the association between the number of primary healthcare workers and diarrhea morbidity.Results: Positive global autocorrelation of diarrhea morbidity was identified based on Global Moran’s I. Significantly high-high and low-low clusters of diarrhea cases as indicated by Local Moran’s I were found to be mainly distributed in western and eastern Sichuan during the studied period years, respectively, which demonstrated consistency with regional economic development status and primary healthcare resource allocations among different regions. The diarrhea morbidity was found to be negatively associated with the number of primary healthcare workers with a coefficient of -0.187 and the P-values <0.05, indicating that a 0.187 reduction of diarrhea morbidity (1/10,000) was associate with doubled amounts of primary healthcare workers.Conclusions: Our findings highlighted the role of primary healthcare resource allocation in the process of diarrhea prevention and control which was reflected by the number of primary healthcare workers among different regions. Our findings also implied that constant efforts should be addressed at governmental and health administrative levels in order to facilitate diarrhea prevention and control, especially in the remoted area where the regional economic development status and primary healthcare resource allocation remain relatively underdeveloped.