Temperature variation and preterm birth among live singleton deliveries in Shenzhen, China: A time-to-event analysis

Li, Changchang; Bloom, Michael S.; Lin, Shao; Ren, Meng; Hajat, Shakoor; Wang, Qiong; Zhang, Wangjian; Ho, Hung Chak; Zhao, Qingguo; Lin, Yan; Huang, Cunrui

doi:10.1016/j.envres.2021.110834

Cited by 10 publications

(12 citation statements)

References 31 publications

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“…As temperature rises further, pregnant women are more susceptible to adverse birth outcomes, and the risk is more prominent after 30 • C [101]. Studies have reported that pregnant women are susceptible to sharp, sudden fluctuations in temperature; for instance, a few studies examined acute effects of temperature variability (i.e., temperature differences between the maximum and minimum temperatures) on adverse maternal, foetal, and neonatal outcomes [8,32,53,93,[102][103][104].Among them, extreme temperature variability associated with elevated risk for PTB was the most common adverse birth outcome examined [32,93,102,104]. For instance, a recent study conducted in Shenzhen, China, reported that maternal exposure to extreme temperature variations over a short period increases PTB risk [102].…”

Section: Gaps and Recommendations For Future Researchmentioning

confidence: 99%

“…Studies have reported that pregnant women are susceptible to sharp, sudden fluctuations in temperature; for instance, a few studies examined acute effects of temperature variability (i.e., temperature differences between the maximum and minimum temperatures) on adverse maternal, foetal, and neonatal outcomes [8,32,53,93,[102][103][104].Among them, extreme temperature variability associated with elevated risk for PTB was the most common adverse birth outcome examined [32,93,102,104]. For instance, a recent study conducted in Shenzhen, China, reported that maternal exposure to extreme temperature variations over a short period increases PTB risk [102]. The study further revealed that the greatest temperature variability related to PTB risk arose in the second trimester of pregnancy, with 5.4% and 23.7% increased risk of PTB associated with 1 • C increase in intra-day temperature variability (i.e., temperature differences between the maximum and minimum daily temperatures), and inter-day temperature variability (i.e., the maximum increase in daily mean temperature between two neighboring days) respectively [102].…”

Section: Gaps and Recommendations For Future Researchmentioning

confidence: 99%

“…For instance, a recent study conducted in Shenzhen, China, reported that maternal exposure to extreme temperature variations over a short period increases PTB risk [102]. The study further revealed that the greatest temperature variability related to PTB risk arose in the second trimester of pregnancy, with 5.4% and 23.7% increased risk of PTB associated with 1 • C increase in intra-day temperature variability (i.e., temperature differences between the maximum and minimum daily temperatures), and inter-day temperature variability (i.e., the maximum increase in daily mean temperature between two neighboring days) respectively [102]. In addition, several studies reported that the association between acute exposure to extreme temperature variations was more robust to PTB; nevertheless, windows of susceptibility differ among studies [32,93,104].…”

Section: Gaps and Recommendations For Future Researchmentioning

confidence: 99%

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Effect of Elevated Ambient Temperature on Maternal, Foetal, and Neonatal Outcomes: A Scoping Review

Dalugoda

Kuppa

Phung

et al. 2022

IJERPH

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This scoping review provides an overview of the published literature, identifies research gaps, and summarises the current evidence of the association between elevated ambient temperature exposure during pregnancy and adverse maternal, foetal, and neonatal outcomes. Following the PRISMA extension for scoping reviews reporting guidelines, a systematic search was conducted on CINAHL, PubMed, and Embase andincluded original articles published in the English language from 2015 to 2020 with no geographical limitations. A total of seventy-five studies were included, conducted across twenty-four countries, with a majority in the USA (n = 23) and China (n = 13). Study designs, temperature metrics, and exposure windows varied considerably across studies. Of the eighteenheat-associated adverse maternal, foetal, and neonatal outcomes identified, pre-term birth was the most common outcome (n = 30), followed by low birth weight (n = 11), stillbirth (n = 9), andgestational diabetes mellitus (n = 8). Overall, papers reported an increased risk with elevated temperature exposures. Less attention has been paid to relationships between heat and the diverse range of other adverse outcomes such as congenital anomalies and neonatal mortality. Further research on these less-reported outcomes is needed to improve understanding andthe effect size of these relationships with elevated temperatures, which we know will be exacerbated by climate change.

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Section: Gaps and Recommendations For Future Researchmentioning

confidence: 99%

Section: Gaps and Recommendations For Future Researchmentioning

confidence: 99%

Section: Gaps and Recommendations For Future Researchmentioning

confidence: 99%

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Effect of Elevated Ambient Temperature on Maternal, Foetal, and Neonatal Outcomes: A Scoping Review

Dalugoda

Kuppa

Phung

et al. 2022

IJERPH

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“…Given no uni ed de nition of TV up to date, DTR and TCN are widely used to represent TV to assess the associations with health outcomes (Li et al 2021;Lim et al 2015;Zhan et al 2017). By contrast, TV daily and TV hourly can better capture the variation of temperature over a short period of time.…”

Section: Discussionmentioning

confidence: 99%

Comparative analysis of daily and hourly temperature variability in association with all-cause and cardiorespiratory mortality in 45 US cities

Yan

Luo

Zhang

et al. 2021

Environ Sci Pollut Res

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BackgroundTemperature variability (TV) has been widely associated with increased mortality risk and burden.Extensive researches have used the standard deviations of several days' daily maximum and minimum temperatures or hourly mean temperatures as daily and hourly TV measures (TV daily and TV hourly ).However, comparative analysis of daily and hourly TV related to cardiorespiratory mortality is still limited. MethodsWe collected daily mortality and meteorological data in 45 US metropolises, 1987-2000. A three-stage analyses were adopted to investigate TV-mortality associations using TV daily and TV hourly as exposure metrics. We rst applied a time-series quasi-Poisson regression to estimate location-speci c TV-mortality relationship, which were then pooled using random-effects meta-analysis with maximum likelihood estimation (MLE). We additionally calculated attributable fractions as a re ection of total mortality burden associated with TV. Strati ed analyses by age were also performed to identify the susceptible group to TV-related risk. ResultsThere were a total of 15.4 million all-cause deaths, of which 6.1 million were from cardiovascular and 1.2 million were from respiratory causes. Per 1 °C increase in TV daily and TV hourly was associated with an increase of 0.53% (95% con dence interval: 0.31-0.76%) and 0.52% (0.26-0.79%) in cardiovascular mortality risks, 0.62% (0.26-0.98%) and 0.53% (0.13-0.94%) in respiratory mortality risks. Estimations of cardiovascular attributable fractions for TV daily and TV hourly were 2.43% (1.42-3.43%) vs 1.63% (0.82-2.43%), whereas respiratory attributable fractions were 3.07% (1.11-4.99%) vs 1.89% (0.43-3.34%). Both daily and hourly indexes showed approximately linear relationships with different mortality categories and similar lag patterns, but greater fractions were estimated using TV daily than those using TV hourly .People over 75 years old were relatively more vulnerable to TV-induced risks of mortality. ConclusionsBoth TV daily and TV hourly signi cantly increased all-cause and cardiorespiratory mortality risks and burden. Daily TV metrics resembled hourly in risk effects, whilst greater mortality burden was found in TV daily than TV hourly . Our ndings may add signi cance to TV-mortality research and help to promote optimal health management strategies to better mitigate TV-related health effect.

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“…26,27,165 For instance, maternal exposure to extreme temperatures was linked to an increased risk of preterm birth in Australia, 166 Europe, 167 the United States, 168 and China. 169 Although most preterm babies survive, maternal exposure to extreme temperature has been pointed out as a leading cause of child mortality, long-term neurological disabilities, and increased risk of respiratory and gastrointestinal complications. 170,171 Consequently, the occurrence of premature births also leads to an increase in the demand for long-term care, which puts pressure on the public health system.…”

Section: Gestational Health Effects Under Cdhw Conditionsmentioning

confidence: 99%

Drought–heatwave nexus in Brazil and related impacts on health and fires: A comprehensive review

Libonati

Geirinhas

Silva

et al. 2022

Annals of the New York Academy of Sciences

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Climate change is drastically altering the frequency, duration, and severity of compound drought‐heatwave (CDHW) episodes, which present a new challenge in environmental and socioeconomic sectors. These threats are of particular importance in low‐income regions with growing populations, fragile infrastructure, and threatened ecosystems. This review synthesizes emerging progress in the understanding of CDHW patterns in Brazil while providing insights about the impacts on fire occurrence and public health. Evidence is mounting that heatwaves are becoming increasingly linked with droughts in northeastern and southeastern Brazil, the Amazonia, and the Pantanal. In those regions, recent studies have begun to build a better understanding of the physical mechanisms behind CDHW events, such as the soil moisture–atmosphere coupling, promoted by exceptional atmospheric blocking conditions. Results hint at a synergy between CDHW events and high fire activity in the country over the last decades, with the most recent example being the catastrophic 2020 fires in the Pantanal. Moreover, we show that HWs were responsible for increasing mortality and preterm births during record‐breaking droughts in southeastern Brazil. This work paves the way for a more in‐depth understanding on CDHW events and their impacts, which is crucial to enhance the adaptive capacity of different Brazilian sectors.

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Temperature variation and preterm birth among live singleton deliveries in Shenzhen, China: A time-to-event analysis

Cited by 10 publications

References 31 publications

Effect of Elevated Ambient Temperature on Maternal, Foetal, and Neonatal Outcomes: A Scoping Review

Effect of Elevated Ambient Temperature on Maternal, Foetal, and Neonatal Outcomes: A Scoping Review

Comparative analysis of daily and hourly temperature variability in association with all-cause and cardiorespiratory mortality in 45 US cities

Drought–heatwave nexus in Brazil and related impacts on health and fires: A comprehensive review

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