Ambient temperature, birth rate, and birth outcomes: evidence from South Korea

Cho, Hyunkuk

doi:10.1007/s11111-019-00333-6

Cited by 23 publications

(15 citation statements)

References 45 publications

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“…Preterm birth was identified as a major outcome variable in 44 articles (Table 3 [17,19,20,24,25,28,31,33,35,37,[42][43][44][45]48,52,54,55,57,58,63,64,66,67,[71][72][73]76,[79][80][81][83][84][85][86][87][88][90][91][92][93][96][97][98]). Most studies implemented a cohort (17), time-series, registry (11) or population registry (10) design, and described positive associations (40) between environmental heat exposures and preterm birth.…”

Section: Preterm Birthmentioning

confidence: 99%

“…See reference list for 44 studies included in analysis[17,19,20,24,25,28,31,33,35,37,[42][43][44][45]48,52,54,55,57,58,63,64,66,67,[71][72][73]76,[79][80][81][83][84][85][86][87][88][90][91][92][93][96][97][98].1 Several studies included temperature exposures up to month prior to delivery in analysis; included in 2nd/3rd trimester 2. Ha et al, 2017, included multiple exposure periods from 1st/2nd trimesters in analysis[44]-included in any part of pregnancy.…”

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confidence: 99%

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Extreme Heat and Pregnancy Outcomes: A Scoping Review of the Epidemiological Evidence

Syed

O’Sullivan

Phillips

2022

IJERPH

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Background: Extreme heat caused by climate change is a major public health concern, disproportionately affecting poor and racialized communities. Gestational heat exposure is a well-established teratogen in animal studies, with a growing body of literature suggesting human pregnancies are similarly at risk. Characterization of extreme heat as a pregnancy risk is problematic due to nonstandard definitions of heat waves, and variable study designs. To better focus future research in this area, we conducted a scoping review to assess the effects of extreme heat on pregnancy outcomes. Methods: A scoping review of epidemiological studies investigating gestational heat-exposure and published 2010 and 2020, was conducted with an emphasis on study design, gestational windows of sensitivity, adverse pregnancy outcomes and characterization of environmental temperatures. Results: A sample of 84 studies was identified, predominantly set in high-income countries. Preterm birth, birthweight, congenital anomalies and stillbirth were the most common pregnancy outcome variables. Studies reported race/ethnicity and/or socioeconomic variables, however these were not always emphasized in the analysis. Conclusion: Use of precise temperature data by most studies avoided pitfalls of imprecise, regional definitions of heat waves, however inconsistent study design, and exposure windows are a significant challenge to systematic evaluation of this literature. Despite the high risk of extreme heat events and limited mitigation strategies in the global south, there is a significant gap in the epidemiological literature from these regions. Greater consistency in study design and exposure windows would enhance the rigor of this field.

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Section: Preterm Birthmentioning

confidence: 99%

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confidence: 99%

Extreme Heat and Pregnancy Outcomes: A Scoping Review of the Epidemiological Evidence

Syed

O’Sullivan

Phillips

2022

IJERPH

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“…However, to date, evidence remains limited (Kloog et al 2015;Zhang, Yu, and Wang 2017;Basu et al 2018), and that which is available is somewhat mixed. For example, a recent analysis of data from Korea found no significant temperature effect on birth outcomes (Cho 2020). A systematic review published in 2017 concluded that the evidence linking preterm birth and low birth weight to ambient temperature was still very limited and not yet conclusive, though there were more examples of adverse estimated effects for high temperatures than for low temperatures (Zhang, Yu, and Wang 2017).…”

Section: Extreme Temperature and Birth Outcomesmentioning

confidence: 99%

“…Ambient environmental conditions, including both air pollution and temperature, have been associated with adverse birth outcomes in a number of settings, though findings for temperature remain limited (Shah and Balkhair 2011;Stieb et al 2012;Klepac et al 2018;Melody et al 2019;Cho 2020;Kloog et al 2015;Zhang, Yu, and Wang 2017). There is some suggestive evidence that lower socioeconomic status groups, defined by occupation or education, might be distinctly vulnerable to the ill effects of air pollution or extreme temperatures, but there is a need for additional studies to consider possible mitigation of negative effects by maternal education (see Basu et al (2018) and Son et al (2019) for contradictory findings on temperature and birth weight; for a review of findings on pollution and low birth weight, see Westergaard et al (2017)).…”

Section: Introductionmentioning

confidence: 99%

Same Environment, Stratified Impacts? Air Pollution, Extreme Temperatures, and Birth Weight in Southeast China

Behrman

Hannum

et al. 2021

SSRN Journal

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Ambient air pollution and extreme temperatures have been associated in a number of settings with adverse birth outcomes. However, some newborns may be more vulnerable than others. First, the pathway from ambient conditions to adverse birth outcomes could vary according to indicators of socioeconomic status such as maternal education. For example, less-educated mothers may be more vulnerable than more-educated mothers if they lack access to living, work, transportation, and leisure spaces with indoor air filtration and temperature regulation, or if they lack knowledge of or resources for mitigation strategies. Second, overall effect modifications associated with maternal education may mask another source of heterogeneity: babies' underlying innate health. Protective effects of maternal education may be more pronounced for the most physically vulnerable babies.Linking 54,828 singleton live birth records from a district in Guangzhou, China to ambient air pollution (PM10 and a composite measure) and extreme temperature data, we test whether, overall, maternal education is an "effect modifier" in the relationships between ambient air pollution, extreme temperature, and birth weight. Via conditional quantile regressions, we then test for effect heterogeneity according to the underlying physical vulnerability of babies-those further to the left in the conditional distribution of birth weight-after conditioning on other confounders. Results show that the protection associated with a college-educated mother with respect to pollution and extreme heat is substantial: up to 0.31 standard deviations of birth weight. Importantly, this protection is amplified under more extreme ambient conditions and for physically vulnerable infants, after conditioning on other confounders.

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“…Despite this long-standing interest, causal estimation of the relationship between temperature and overall conception rates is missing. Existing studies have only examined the effect of temperature on live birth rates, and they have found that exposure to hot temperature causes a decline in birth rates 9-10 months later (Seiver 1989;Lam and Miron 1996;Barreca et al 2018;Cho 2020). Barreca et al (2018) also have found that this decline is followed by a partial rebound in the next 3 months.…”

Section: Introductionmentioning

confidence: 99%

Temperature, climate change, and human conception rates: evidence from Hungary

Hajdu

2021

J Popul Econ

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In this paper, we examine the relationship between temperature and human conception rates and project the impacts of climate change by the mid-twenty-first century. Using complete administrative data on 6.8 million pregnancies between 1980 and 2015 in Hungary, we show that exposure to hot temperatures reduces the conception rate in the first few weeks following exposure, but a partial rebound is observed after that. We project that with absent adaptation, climate change will increase seasonal differences in conception rates and annual conception rates will decline. A change in the number of induced abortions and spontaneous fetal losses drives the decline in conception rates. The number of live births is unaffected. However, some newborns will experience a shift in the timing of conception that leads to changes in in utero temperature exposure and therefore might have further consequences.

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Ambient temperature, birth rate, and birth outcomes: evidence from South Korea

Cited by 23 publications

References 45 publications

Extreme Heat and Pregnancy Outcomes: A Scoping Review of the Epidemiological Evidence

Extreme Heat and Pregnancy Outcomes: A Scoping Review of the Epidemiological Evidence

Same Environment, Stratified Impacts? Air Pollution, Extreme Temperatures, and Birth Weight in Southeast China

Temperature, climate change, and human conception rates: evidence from Hungary

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