A Meta-analysis on the relations between short-term exposure to PM2.5 and both mortality and related emergency visits in China / 中华流行病学杂志
Chinese Journal of Epidemiology
; (12): 1394-1401, 2018.
Article
in Zh
| WPRIM
| ID: wpr-736690
Responsible library:
WPRO
ABSTRACT
Objective To carry out a quantitative estimate that related to the effects of shortterm exposure to PM2.5 on all-cause mortality and emergency visits in China by using the systematic review and Meta-analysis.Methods We selected all the studies published before March 2018 from China National Knowledge Infrastructure,Wanfang database,PubMed and EMBASE and data on relative risk (RR),excess risk (ER) and their 95%CIs:appeared in these papers were extracted.According to the differences in the size or direction (heterogeneity) of the results,we computed summary estimates of the effect values using a random-effect or fixed effect model.We also conducted the subgroup analysis and Meta-analysis to have assessed the selected studies for the evidence of study bias.Results A total of 33 original studies,indexed in databases,were identified.Among those studies,39 sets of data on mortality and 4 sets of data on emergency were valid to show that within the daily concentration range from 47.7 to 176.7 pg/m3,for 10 μg/m3 increases in PM2.5 concentrations,it would increase the daily numbers of deaths by 0.49% (95%CI:0.39%-0.59%) and 0.30% (95%CI:0.10%-0.51%) for all-cause deaths and all-cause emergency-room visits,respectively.For subgroup analysis,the combined effect of PM2.5 in causing short-term all-cause deaths in the northern areas (ER=0.42%,95%CI:0.30%-0.54%) seemed lower than that in the southern areas (ER=0.63%,95%CI:0.44%-0.82%).The combined effect of PM2.5 concentration below 75 μg/m3 (ER=0.50%,95%CI:0.37%-0.62%) was higher than that of PM25 concentration ≥75 μ g/m3 (ER=0.39%,95% CI:0.26%-0.52%).Conclusion Within the concentration range from 47.7 to 176.7 μg/m3,short-term exposure to current level of PM2.5 might increase both the all-cause daily mortality and daily emergency visits in China.
Full text:
1
Index:
WPRIM
Type of study:
Etiology_studies
/
Systematic_reviews
Language:
Zh
Journal:
Chinese Journal of Epidemiology
Year:
2018
Type:
Article