Abstract:
Objective To assess the association between fine particulate matter (PM2.5) concentrations and the hospital outpatient visits for respiratory diseases in China.
Method Based on the online search for publication on the association between PM2.5 concentrations and hospital outpatient visits for respiratory diseases, Stata 12.0 was used to perform meta-analysis.
Result Eventually 12 literatures and 13 sets of data were included, covering 8 areas in China. An increase of 10 μg/m3 of PM2.5 corresponded to a relative risk (RR) of 1.005 (95%CI:1.003-1.007) for respiratory outpatient visits. After excluding heterogeneous data, the RR of respiratory outpatient visits was 1.005 (95%CI:1.003-1.008). Specifically, that for adults and children was 1.004 (95%CI:1.000-1.007) and 1.008 (95%CI:1.003-1.013), respectively; that for Northern China and Southern China was 1.006 (95%CI:1.002-1.009) and 1.004 (95%CI:1.000-1.009), respectively. The RRs of respiratory diseases, asthma, and respiratory infection were 1.005 (95%CI:1.001-1.008), 1.008 (95%CI:1.003-1.013), and 1.001 (95%CI:0.997-1.004), respectively. There was no significant publication bias according to the results of funnel plot and Egger test.
Conclusion A positive association exists between PM2.5 concentrations and hospital outpatient visits for respiratory diseases in China.
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