Evidence map›Paper›PMID 26672059›Full record

ArticleEnvironmental health perspectives2016

Ambient Temperature and the Risk of Preterm Birth in Guangzhou, China (2001-2011).

Jian-Rong He, Yu Liu, Xiao-Yan Xia, Wen-Jun Ma, Hua-Liang Lin, Hai-Dong Kan, Jin-Hua Lu, Qiong Feng, Wei-Jian Mo, Ping Wang and 3 more

Open access · diamondAbstract read
In one paragraph

Article in Environmental health perspectives, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 79 papers, 6 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
79citing papers in PubMed, 6 pooled it
5.8field-weighted citation impact, top 3% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

79 citing papers in PubMed, 6 syntheses or guidelines pooled it, 168 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. A review of the impact of outdoor and indoor environmental factors on human health in China.Environmental science and pollution research international · 2020
    Pooled it
  4. Pooled it
  5. Heat Exposure and Maternal Health in the Face of Climate Change.International journal of environmental research and public health · 2017
    Pooled it
  6. Pooled it
  7. Article
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  13. Exposure to low concentrations of PMBMC public health · 2025
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  19. Review
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19 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

13 authors at 6 institutions in 3 countries.

Jian-Rong HeDivision of Birth Cohort Study, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China.
Yu Liu
Xiao-Yan Xia
Wen-Jun Ma
Hua-Liang Lin
Hai-Dong Kan
Jin-Hua Lu
Qiong Feng
Wei-Jian Mo
Ping Wang
Hui-Min Xia
Xiu Qiu
Louis J Muglia
Cohort (United Kingdom) · GBGuangzhou Medical University · CNGuangdong Provincial Center for Disease Control and Prevention · CNCincinnati Children's Hospital Medical Center · USFudan University · CNGuangzhou Women and Children Medical Center · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundAlthough effects of weather changes on human health have been widely reported, there is limited information regarding effects on pregnant women in developing countries.

objectiveWe investigated the association between maternal exposure to ambient temperature and the risk of preterm birth (< 37 weeks of gestation) in Guangzhou, China.

methodsWe used a Cox proportional hazards model to estimate associations between preterm birth and average temperature during each week of gestation, with weekly temperature modeled as a time-varying exposure during four time windows: 1 week (the last week of the pregnancy), 4 weeks (the last 4 weeks of the pregnancy), late pregnancy (gestational week 20 onward), and the entire pregnancy. Information on singleton vaginal birth between 2001 and 2011 was collected. Daily meteorological data during the same period were obtained from the Guangzhou Meteorological Bureau.

resultsA total of 838,146 singleton vaginal births were included, among which 47,209 (5.6%) were preterm births. High mean temperatures during the 4 weeks, late pregnancy, and the entire pregnancy time windows were associated with an increased risk of preterm birth. Compared with the median temperature (24.4°C), weekly exposures during the last 4 weeks of the pregnancy to extreme cold (7.6°C, the 1st percentile) and extreme heat (31.9°C, the 99th percentile) were associated with 17.9% (95% CI: 10.2, 26.2%) and 10.0% (95% CI: 2.9, 17.6%) increased risks of preterm birth, respectively. The association between extreme heat and preterm birth was stronger for preterm births during weeks 20-31 and 32-34 than those during weeks 35-36.

conclusionsThese findings might have important implications in preventing preterm birth in Guangzhou as well as other areas with similar weather conditions. CITATION: He JR, Liu Y, Xia XY, Ma WJ, Lin HL, Kan HD, Lu JH, Feng Q, Mo WJ, Wang P, Xia HM, Qiu X, Muglia LJ. 2016. Ambient temperature and the risk of preterm birth in Guangzhou, China (2001-2011). Environ Health Perspect 124:1100-1106; http://dx.doi.org/10.1289/ehp.1509778.

Indexed as

Extreme HeatChinaFemaleHumansMaternal ExposurePregnancyPremature BirthTemperature

Identifiers

PMID26672059
PMCPMC4937853
OpenAlexW2414165675

What OpenQuestion holds

Textmetadata
LicenceCC0
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.