BJOG : an international journal of obstetrics and gynaecology · 2013
Maternal exposure to heatwave and preterm birth in Brisbane, Australia.
СтатьяПоддержка исследования: вне правительства СШАНазвание и аннотация: Перевод в очереди
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Wang J, Williams G, Guo Y, Pan X, Tong S
Аннотация
OBJECTIVE: To quantify the short-term effects of maternal exposure to heatwave on preterm birth.
DESIGN: An ecological study.
SETTING: A population-based study in Brisbane, Australia.
POPULATION: All pregnant women who had a spontaneous singleton live birth in Brisbane between November and March in 2000-2010 were studied.
METHODS: Daily data on pregnancy outcomes, meteorological factors, and ambient air pollutants were obtained. The Cox proportional hazards regression model with time-dependent variables was used to examine the short-term impact of heatwave on preterm birth. A series of cut-off temperatures and durations were used to define heatwave. Multivariable analyses were also performed to adjust for socio-economic factors, demographic factors, meteorological factors, and ambient air pollutants.
MAIN OUTCOME MEASURE: Spontaneous preterm births.
RESULTS: The adjusted hazard ratios (HRs) ranged from 1.13 (95% CI 1.03-1.24) to 2.00 (95% CI 1.37-2.91) by using different heatwave definitions, after controlling for demographic, socio-economic, and meteorological factors, and air pollutants.
CONCLUSIONS: Heatwave was significantly associated with preterm birth: the associations were robust to the definitions of heatwave. The threshold temperatures, instead of duration, could be more likely to influence the evaluation of birth-related heatwaves. The findings of this study may have significant public health implications as climate change progresses.
DESIGN: An ecological study.
SETTING: A population-based study in Brisbane, Australia.
POPULATION: All pregnant women who had a spontaneous singleton live birth in Brisbane between November and March in 2000-2010 were studied.
METHODS: Daily data on pregnancy outcomes, meteorological factors, and ambient air pollutants were obtained. The Cox proportional hazards regression model with time-dependent variables was used to examine the short-term impact of heatwave on preterm birth. A series of cut-off temperatures and durations were used to define heatwave. Multivariable analyses were also performed to adjust for socio-economic factors, demographic factors, meteorological factors, and ambient air pollutants.
MAIN OUTCOME MEASURE: Spontaneous preterm births.
RESULTS: The adjusted hazard ratios (HRs) ranged from 1.13 (95% CI 1.03-1.24) to 2.00 (95% CI 1.37-2.91) by using different heatwave definitions, after controlling for demographic, socio-economic, and meteorological factors, and air pollutants.
CONCLUSIONS: Heatwave was significantly associated with preterm birth: the associations were robust to the definitions of heatwave. The threshold temperatures, instead of duration, could be more likely to influence the evaluation of birth-related heatwaves. The findings of this study may have significant public health implications as climate change progresses.