Short-term effects of ambient temperature on preterm birth: a time-series analysis in Xuzhou, China

Cheng, Peng; Peng, Lei; Hao, Jingwen; Li, Sha; Zhang, Chao; Dou, Lianjie; Fu, Weinan; Yang, Fan; Hao, Jiahu

doi:10.1007/s11356-020-11201-4

Cited by 11 publications

(8 citation statements)

References 28 publications

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“…After removing 542 duplicates, the titles and abstracts of 2310 articles were screened for eligibility, and the full texts of 192 articles were reviewed. Finally, 34 studies were included in the systematic review of adverse birth outcomes: 22 for preterm birth, [12,13,15,[20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38] including 13 studies for LBW, [12,14,34,36,[39][40][41][42][43][44][45][46][47] and five for stillbirth. [12,25,34,48,49] Among the 34 studies, five reported more than one outcome, 24 of which were included in the meta-analysis with eligible data [Figure 1].…”

Section: Resultsmentioning

confidence: 99%

“…A total of 22 studies explored the association between preterm birth and low ambient temperature exposure during pregnancy [Supplementary Table 1, http://links.lww.com/CM9/B257]. Most studies (16/22) found that maternal exposure to low temperature increased the risk of preterm birth [12,13,15,21–26,28,29,32–35,37] . However, four studies documented that low ambient temperature was a protective factor, [20,27,31,38] and two studies showed no significant difference [30,36] .…”

Section: Resultsmentioning

confidence: 99%

“…Most studies (16/22) found that maternal exposure to low temperature increased the risk of preterm birth. [12,13,15,[21][22][23][24][25][26]28,29,[32][33][34][35]37] However, four studies documented that low ambient temperature was a protective factor, [20,27,31,38] and two studies showed no significant difference. [30,36] We conducted a meta-analysis on 18 studies with eligible data.…”

Section: Preterm Birthmentioning

confidence: 98%

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Association between low ambient temperature during pregnancy and adverse birth outcomes: a systematic review and meta-analysis

Ruan

Yan

et al. 2023

Chinese Medical Journal

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Background: Extreme temperature events, including extreme cold, are becoming more frequent worldwide, which might be harmful to pregnant women and cause adverse birth outcomes. We aimed to investigate the association between exposure to low ambient temperature in pregnant women and adverse birth outcomes, such as preterm birth, low birth weight, and stillbirth, and to summarize the evidence herein. Methods: Relevant studies were searched in PubMed, Cochrane, and Embase electronic databases until November 2021. Studies involving low ambient temperature, preterm birth, birth weight, and stillbirth were included. The guidelines of the Preferred Reporting Items for Systematic Reviews and Meta-analyses were followed to conduct this study risk of bias and methods for data synthesis.Results: A total of 34 studies were included. First, pregnant women exposed to low ambient temperature had an increased risk of preterm birth (risk ratio [RR] 1.08; 95% confidence interval [CI] 1.04-1.13). Subgroup analyses revealed that exposure during late pregnancy was more likely to induce preterm birth. In addition, only pregnant women exposed to <1st percentile of the mean temperature suffered increased risk of preterm birth. Moreover, pregnant women living in medium or hot areas were more prone to have preterm births than those in cold areas when exposed to low ambient temperatures. Asians and Blacks were more susceptible to low ambient temperatures than Caucasians. Second, pregnant women exposed to low ambient temperature had an increased risk of low birth weight (RR 1.07; 95% CI 1.03-1.12). Third, pregnant women had an increased risk of stillbirth while exposed to low ambient temperature during the entire pregnancy (RR 4.63;. Conclusions: Exposure to low ambient temperature during pregnancy increases the risk of adverse birth outcomes. Pregnant women should avoid exposure to extremely low ambient temperature (<1st percentile of the mean temperature), especially in their late pregnancy. This study could provide clues for preventing adverse outcomes from meteorological factors. Registration: No. CRD42021259776 at PROSPERO (https://www.crd.york.ac.uk/PROSPERO/).

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Preterm Birthmentioning

confidence: 98%

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Association between low ambient temperature during pregnancy and adverse birth outcomes: a systematic review and meta-analysis

Ruan

Yan

et al. 2023

Chinese Medical Journal

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“…One cohort study reported a 1.187-2.493 odds ratio of preterm birth when exposed to a temperature extreme < 1st percentile of mean daily temperature 55 , and another reported a maximum preterm birth odds ratio of 1.192-1.744 following the 2008 cold spell in two sub-tropical cities in Guangdong Province, China 56 . Nineteen studies concluded that exposure to temperature extremes (with assorted de nitions) was associated with an increased risk of preterm birth [43][44][45][46][47][48][49][51][52][53][54][55][56][57][58][59][60][61][62][63] . In terms of absolute increases in temperature, the odds ratio of preterm births was 1.043-1.246 following an increase of 5.5 o C in weekly mean temperature [64][65][66] , similar to other studies 67-71 identifying a positive relationship between increases in mean ambient temperature and preterm birth.…”

Section: Resultsmentioning

confidence: 99%

First systematic review and meta-analysis of the risk magnitude of climate-change effects on child health

Weeda,

Bradshaw,

Judge

et al. 2023

Preprint

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Children are significantly more vulnerable than adults to climate-related health threats, but studies examining how climate change affects human health have been mainly descriptive and lack an assessment of the magnitude of health effects children face. In this systematic review and meta-analysis, we searched online databases PubMed, Medline, Embase, and Web of Science for observational studies published up to 5 January 2023 following PRISMA guidelines. We included studies if they explored climate variables/events and measured a quantifiable child-health outcome. We extracted data from published reports for a meta-analysis where we standardised effect sizes and compared them among different groupings of climate variables and health outcomes. We evaluated each study individually and aggregated and analysed relevant qualitative and quantitative data. We identified 1301 articles from the four large databases in our systematic literature review, of which 163 studies were eligible for analysis. We identified many relationships between climate change and child health, the strongest of which were increasing risk (60% on average) of preterm birth from exposure to temperature extremes. Respiratory disease, mortality, and morbidity were also influenced by climate changes, but to a lesser extent than preterm birth. The effects of different pollutants on health outcomes were considerably smaller compared to temperature effects, but with most (16/20 = 80%) pollutant studies indicating at least a weak effect. Most studies occurred in high-income regions, but we found no geographical clustering according to health outcome, climate variable, or magnitude of risk. We identified the following protective factors for climate-related child-health threats: (i) economic stability and strength, (ii) access to quality healthcare, (iii) adequate infrastructure, and (iv) food security. Threats to these services vary by local geographical, climate, and socio-economic conditions. Children will have increased prevalence and severity of disease due to anthropogenic climate change, and our quantification of the magnitude of expected increases is essential to plan for mitigation that will improve the health of current and future generations.

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“…There has been increasing interest in investigating the effects of heat exposure on fetal development 8 . Epidemiological studies in recent years have reported the association between extreme heat temperature, heat stress, premature birth 17 , low birth weight 18 , and stillbirth 19 , 20 . A systematic review of the effect of temperature on pregnancy outcomes showed stronger evidence of adverse effects due to heat than cold 3 .…”

Section: Discussionmentioning

confidence: 99%

Extreme temperature increases the risk of stillbirth in the third trimester of pregnancy

Yang

Lee

Chio

2022

Sci Rep

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Epidemiological studies have reported the association between extreme temperatures and adverse reproductive effects. However, the susceptible period of exposure during pregnancy remains unclear. This study aimed to assess the impact of extreme temperature on the stillbirth rate. We performed a time-series analysis to explore the associations between temperature and stillbirth with a distributed lag nonlinear model. A total of 22,769 stillbirths in Taiwan between 2009 and 2018 were enrolled. The mean stillbirth rate was 11.3 ± 1.4 per 1000 births. The relative risk of stillbirth due to exposure to extreme heat temperature (> 29 °C) was 1.18 (95% CI 1.11, 1.25). Pregnant women in the third trimester were most susceptible to the effects of extreme cold and heat temperatures. At lag of 0–3 months, the cumulative relative risk (CRR) of stillbirth for exposure to extreme heat temperature (29.8 °C, 97.5th percentile of temperature) relative to the optimal temperature (21 °C) was 2.49 (95% CI: 1.24, 5.03), and the CRR of stillbirth for exposure to extreme low temperature (16.5 °C, 1st percentile) was 1.29 (95% CI: 0.93, 1.80). The stillbirth rate in Taiwan is on the rise. Our findings inform public health interventions to manage the health impacts of climate change.

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Short-term effects of ambient temperature on preterm birth: a time-series analysis in Xuzhou, China

Cited by 11 publications

References 28 publications

Association between low ambient temperature during pregnancy and adverse birth outcomes: a systematic review and meta-analysis

Association between low ambient temperature during pregnancy and adverse birth outcomes: a systematic review and meta-analysis

First systematic review and meta-analysis of the risk magnitude of climate-change effects on child health

Extreme temperature increases the risk of stillbirth in the third trimester of pregnancy

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