Abstract
Cognitive impairment is now a major concern in public health in many countries. Previous studies have found that ambient air pollution can cause great damage to cognitive function among older adults. However, the impact of household air pollution (HAP) on cognitive function is not well elaborated. In this study, we used a nationally representative longitudinal survey for middle-aged and older individuals in China, combined with a propensity score matching method, we found that HAP has a significant adverse effect on the cognitive functions among the middle-aged and older Chinese individuals. The heterogeneity analysis also indicated that the associations are generally higher in females, individuals aged 60 years or older, and individuals who lived in the urban area. Our findings suggest that switching the type of household fuel may be of great public health value for the prevention of cognitive impairment.
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Data availability
The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.
Notes
CHARLS datasets can be accessed through its official website (http://charls.pku.edu.cn/).
Datasets of PM2.5 are available at http://fizz.phys.dal.ca/~atmos/martin/?page_id=140.
China Meteorological Data Service Center. http://data.cma.cn/en.
One problem with propensity score matching method is that the selection of the matched sample is based on propensity scores which are estimated, not known, thus the matching scheme is an estimate as well.
Above all, in the case of a limited sample, accuracy and scientific validity of the experimental results remains robust in that PSM method can always help find paired control groups to generate a causal inference between HAP and cognitive impairment.
For age, Group 1 means age < 60, Group 2 means age ≥ 60; For gender, Group 1 means male and Group2 means female; For residence, Group 1 means rural while Group 2 means urban.
For brevity, we only show the results using global cognition, results of the other two cognitive remain robust.
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Acknowledgements
We also would like to thank the anonymous referees for their helpful suggestions and corrections on the earlier draft of our paper, upon which we have improved the content.
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The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China (72174195, 71804182).
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All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by [Wenwen Wang], [Qi Yao], and [Ming Zhang]. The first draft of the manuscript was written by [Qi Yao] and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Wang, W., Yao, Q. & Zhang, M. Impacts of household air pollution on cognitive impairment: evidence from China. Air Qual Atmos Health 16, 1065–1078 (2023). https://doi.org/10.1007/s11869-023-01325-0
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DOI: https://doi.org/10.1007/s11869-023-01325-0