The association between ambient air pollution and selected adverse pregnancy outcomes in China: A systematic review

Jacobs, Milena; Zhang, Guicheng; Chen, Shu; Mullins, Benjamin J.; Bell, Michelle L.; Jin, Lan; Lee, Hyewon; Huxley, Rachel R.; Pereira, Gavin

doi:10.1016/j.scitotenv.2016.11.100

Cited by 116 publications

(65 citation statements)

References 39 publications

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“…In some cities, sample sizes for some items were even too small to give odds ratios to show the studied associations. Fourthly, we did not collect information about sources other than what we have discussed, 26,55 as well as ambient air pollution, 56 temperature, 57 and noise, 15,16 which could confound our targeted associations.…”

Section: Discussionmentioning

confidence: 99%

Household renovation before and during pregnancy in relation to preterm birth and low birthweight in China

Huang

Zhao

et al. 2019

Indoor Air

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From October 2010 to April 2012, we conducted a cross‐sectional study of associations between household environments and childhood health among preschool children in eight Chinese cities. Here, we analyze associations of early household renovation with preterm birth (PTB), low birthweight (LBW), term low birthweight (Term‐LBW), and small for gestational age (SGA). Parents responded to questions about household renovation and their children's gestational age and birthweight. In the multivariate logistic regression analyses, household renovation in the year before pregnancy was significantly associated with LBW (sample size: N = 25 813; adjusted odds ratio (OR) with 95% confidence intervals (CIs): 1.23, 1.01‐1.50) and Term‐LBW (N = 24 823; 1.29, 1.01‐1.67). Household renovation during pregnancy was significantly associated with PTB (N = 25 202; 1.28, 1.01‐1.69). These significant associations were also found in the two‐level (city‐child) logistic regression analyses and in the sensitivity analyses among 21 009 children with complete data in all studied variates. Stronger associations were found in certain subgroups. Our findings indicate that household renovation within one year before pregnancy might be a risk factor for LBW and Term‐LBW, while household renovation during pregnancy could be a risk factor for PTB.

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Section: Discussionmentioning

confidence: 99%

Household renovation before and during pregnancy in relation to preterm birth and low birthweight in China

Huang

Zhao

et al. 2019

Indoor Air

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“…54, 55 Infants and children, adolescents, and the elderly, are more susceptible than the general population to the damaging effects of these pollutants, 55, 56 and ambient air pollution in China (especially PM) is associated with adverse pregnancy outcomes including lower birth weights, pre-term birth, and congenital anomaly, especially cardiovascular defects. 57 Epidemiological studies that assess exposure to air pollutants in relation to population proximity to roads shed some light on the unique role of transportation emissions in contributing to poor health (appendix). …”

Section: Health Consequences Of Transport Associated With Physicalmentioning

confidence: 99%

Transport and public health in China: the road to a healthy future

et al. 2017

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Transportation-related risk factors are a major source of morbidity and mortality in China, where expansion of road networks and surges in personal vehicle ownership are having profound effects on public health. Road traffic injuries and fatalities have increased alongside motorized transport in China, and accident injury risk is aggravated by inadequate emergency response systems and trauma care. National air quality standards and emission control technologies are having a positive effect, yet persistent air pollution is increasingly attributable to a growing and outdated vehicle fleet, and famously congested roads. Urban design favors motorized transport, and physical activity and its associated health benefits are hindered by poor urban infrastructure. Transport emissions of greenhouse gases contribute substantially to regional and global climate change, which compound public health risks from multiple factors. Despite these complex challenges, technological advances and innovations in planning and policy stand to make China a leader in sustainable, healthy transportation.

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“…However, other potentially harmful and ubiquitous prenatal exposures, such as extreme ambient temperature have been relatively understudied with respect to their potential effects on fetal outcomes. Prenatal exposures to air pollution in relation to fetal growth have received more attention, but findings are generally inconsistent across pollutants and studies partially due to heterogeneity in study design and exposure distribution (Jacobs et al, 2016; Stieb et al, 2012). Previous research suggests that exposures to extreme temperature as well as high air pollution may increase oxidative stress and systemic inflammation in the general population (Ghio et al, 2012; Kahle et al, 2015; Moller et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Ambient temperature and air quality in relation to small for gestational age and term low birthweight

Zhu

Liu

et al. 2017

Environmental Research

104

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Background Exposures to extreme ambient temperature and air pollution are linked to adverse birth outcomes, but the associations with small for gestational age (SGA) and term low birthweight (tLBW) are unclear. We aimed to investigate exposures to site-specific temperature extremes and selected criteria air pollutants in relation to SGA and tLBW. Methods We linked medical records of 220,572 singleton births (2002–2008) from 12 US sites to local temperature estimated by the Weather Research and Forecasting model, and air pollution estimated by modified Community Multiscale Air Quality models. Exposures to hot (>95th percentile) and cold (<5th percentile) were defined using site-specific distributions of daily temperature over three-month preconception, each trimester, and whole-pregnancy. Average concentrations of five criteria air pollutants and six fine particulate matter constituents were also calculated for these pregnancy windows. Poisson regression with generalized estimating equations calculated the relative risks (RR) and 95% confidence intervals for SGA (weight <10th percentile conditional on gestational age and sex) and tLBW (≥37 weeks and <2,500 grams) associated with an interquartile range increment of air pollutants, and cold or hot compared to mild (5–95th percentile) temperature. Models were adjusted for maternal demographics, lifestyle, and clinical factors, season, and site. Results Compared to mild temperature, cold exposure during trimester 2 [RR: 1.21 (1.05–1.38)], trimester 3 [RR: 1.18 (1.03–1.36)], and whole-pregnancy [RR: 2.57 (2.27–2.91)]; and hot exposure during trimester 3 [RR: 1.31 (1.15–1.50)] and whole-pregnancy [RR: 2.49 (2.20–2.83)] increased tLBW risk. No consistent association was observed between temperature and SGA. Air pollutant analyses were generally null but preconception elemental carbon was associated with a 4% increase in SGA while dust particles increased tLBW by 10%. Particulate matter ≤10 microns in the second trimester and whole pregnancy also appeared related to tLBW. Conclusions: Our findings suggest prenatal exposures to extreme ambient temperature relative to usual environment may increase tLBW risk. Given concerns related to climate change, these findings merit further investigation.

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The association between ambient air pollution and selected adverse pregnancy outcomes in China: A systematic review

Cited by 116 publications

References 39 publications

Household renovation before and during pregnancy in relation to preterm birth and low birthweight in China

Household renovation before and during pregnancy in relation to preterm birth and low birthweight in China

Transport and public health in China: the road to a healthy future

Ambient temperature and air quality in relation to small for gestational age and term low birthweight

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