Nivedhitha Parthasarathy, Fangyu Li, Feng Zhang, Ru-Jye Chuang, Mallika Mathur, Mike Pomeroy, Jacqueline Noyola, Christine M Markham, Shreela V Sharma
A Cross-Sectional Study Analyzing Predictors of Perceived Stress Among Elementary School Teachers During the COVID-19 Pandemic
Workplace health & safety
preterm birth ptb important predictor perinatal morbidity mortality previous researches reported correlation air pollution increased risk preterm birth however specific relationship shortterm longterm exposure carbon monoxide co preterm birth remains less explored populationbased study conducted among 515498 pregnant women chongqing china assess shortterm longterm effects co preterm preterm births generalized additive models gam applied evaluate shortterm effects exposureresponse correlation curves plotted adjusting confounding factors hazard ratios hr 95 confidence intervals ci calculated using cox proportional hazard models estimate longterm effect daily incidence preterm preterm birth 599 041 respectively positive association 100 gm increase co ptb observed lag 03 days 1221 days maximum relative risk rr 102195ci 10011043 exposureresponse curves lag 0 day revealed rapid increase ptb due co regarding longterm exposure positive associations found 100 gm3 co increase trimestermodel 2 trimester 1 hr 1054 95ci 10481060 model 2 trimester 2 hr 1066 95ci 10601073 model 2 trimester 3 hr 1007 95ci 10011013 model 2 entire pregnancy hr 1080 95ci 10731088 higher hrs preterm birth multiplicative interactions air pollution co risk preterm preterm birth detected p interaction005 findings suggest shortterm exposure low levels co may protective effects preterm birth longterm exposure low concentrations co may reduce risk preterm preterm birth moreover study indicated preterm birth susceptible influence longterm exposure co pregnancy acute co exposure exhibiting greater impact preterm birth imperative pregnant women minimize exposure ambient air pollutants