Incense Burning during Pregnancy and Birth Weight and Head Circumference among Term Births: The Taiwan Birth Cohort Study

Chen, Le‐Yu; Ho, Christine

doi:10.1289/ehp.1509922

Cited by 34 publications

(24 citation statements)

References 46 publications

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“…2003), whereas some prior studies (Bell et al. 2007; Chen and Ho 2016) considered birth weight as the outcome and adjusted for gestational age; these two approaches may yield different results (Lakshmanan et al. 2015; Oken et al.…”

Section: Discussionmentioning

confidence: 99%

Ambient Temperature and Markers of Fetal Growth: A Retrospective Observational Study of 29 Million U.S. Singleton Births

Sun

Spangler

Weinberger

et al. 2019

Environ Health Perspect

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Background:Emerging studies suggest that ambient temperature during pregnancy may be associated with fetal growth, but the existing evidence is limited and inconsistent.Objectives:We aimed to evaluate the association of trimester-specific temperature with risk of being born small for gestational age (SGA) and birth weight—markers of fetal growth—among term births in the contiguous United States.Methods:We included data on 29,597,735 live singleton births between 1989 and 2002 across 403 U.S. counties. We estimated daily county-level population-weighted mean temperature using a spatially refined gridded climate data set. We used logistic regression to estimate the association between trimester-specific temperature and risk of SGA and linear regression to evaluate the association between trimester-specific temperature and term birth weight z-score, adjusting for parity, maternal demographics, smoking or drinking during pregnancy, chronic hypertension, and year and month of conception. We then pooled results overall and by geographic regions and climate zones.Results:High ambient temperatures (>90th percentile) during the entire pregnancy were associated with higher risk of term SGA {odds ratio [OR] = 1.041 [95% confidence interval (CI): 1.029, 1.054]} and lower term birth weight [standardized to −15g (95% CI: −17g, −13g) reduction in birth weight for infants born at 40 weeks of gestation]. Low temperatures (≤10th percentile) during the entire pregnancy were not associated with SGA [OR = 1.003 (95% CI: 0.991, 1.015)] but were associated with a small decrement in term birth weight [standardized to −6g (95% CI: −8g, −4g)]. Risks of term SGA and birth weight were more strongly associated with temperature averaged across the second and third trimesters, in areas the Northeast, and in areas with cold or very cold climates.Conclusions:Above-average temperatures during pregnancy were associated with lower fetal growth. Our findings provide evidence that temperature may be a novel risk factor for reduced fetal growth. https://doi.org/10.1289/EHP4648

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Section: Discussionmentioning

confidence: 99%

Ambient Temperature and Markers of Fetal Growth: A Retrospective Observational Study of 29 Million U.S. Singleton Births

Sun

Spangler

Weinberger

et al. 2019

Environ Health Perspect

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“…Compared to other study designs, recall bias could be minimized in this prospective study. Our study also benefited from the inclusion of both frequency and duration of incense burning at both early and late pregnancy, as opposed to a previous study that used a binary variable to assess associations of incense exposure with birth size (Chen and Christine, 2016). The relatively large sample size has been important for the exploration of the small effects of incense burning.…”

Section: Discussionmentioning

confidence: 99%

Associations between maternal exposure to incense burning and blood pressure during pregnancy

Wei

Chan

et al. 2018

Science of The Total Environment

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Incense burning is a popular practice in Asian and Arabic countries. Previous studies show that incense burning was associated with increased risks of adverse outcomes among non-pregnant population. However, very few studies explored its health effects among pregnant women, who are more susceptible to environmental stressor. We aimed to examine the association between incense burning at home and hypertensive disorders as well as blood pressure levels during pregnancy, using data from 10,563 pregnant women recruited in Born in Guangzhou Cohort Study, China between January 2013 and December 2015. Information on frequency and duration of exposure to incense burning were collected at early and late pregnancy using questionnaire. Data on outcome variables, including hypertensive disorders diagnosis and blood pressure levels at the final antenatal visit before delivery, were extracted from medical records. We used Poisson regression model and general linear model to examine the associations between incense exposure and the outcomes. We found incense use at early pregnancy was not significantly associated with outcomes. Pregnant women who frequently smelled the incense burning at late pregnancy was associated with higher risk of hypertensive disorders (relative risk, 1.84; 95% confidence interval, 1.14-2.98) and higher levels of blood pressure (1.6mmHg increase of systolic blood pressure; 95% confidence interval, 0.4-2.8mmHg) before delivery, compared to those did not burn incense. These associations tended to more evident among women without active and passive smoking. We did not observe significant dose-response relationship between exposure duration and the risk of hypertensive disorders. We firstly reported exposure to incense burning was associated with the risk of hypertensive disorders and blood pressure levels during pregnancy. Given hypertensive disorders in pregnancy are well-established risk factors for a variety of adverse outcomes and the incense burning is a modifiable factor, our finding may have important public health significance.

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“…[12][13][14] Incense burning is a common traditional practice in both temples and households across the Asia-Pacific region; in Taiwan, about half families burned incense at home. [15][16][17][18] However, the slow and incomplete combustion process produces multiple indoor air pollutants, [19][20][21][22][23] such as polycyclic aromatic hydrocarbon (PAH) and other components of particulate matter (PM), which have been linked with deleterious health outcomes. 15,17,[19][20][21]23 Moreover, incense burning exposure during late pregnancy was found to be associated with increased risk of maternal hypertensive disorder, 24 along with the possible adverse health effects of asthma and respiratory tract symptoms, 18 decreased head circumference and body weight, 16 and delayed gross motor milestone development among term singletons.…”

Section: Introductionmentioning

confidence: 99%

“…Incense burning is a common traditional practice in both temples and households across the Asia‐Pacific region; in Taiwan, about half families burned incense at home 15‐18 . However, the slow and incomplete combustion process produces multiple indoor air pollutants, 19‐23 such as polycyclic aromatic hydrocarbon (PAH) and other components of particulate matter (PM), which have been linked with deleterious health outcomes 15,17,19‐21,23 .…”

Section: Introductionmentioning

confidence: 99%

Associations between household incense burning and delayed motor development among preterm infants modified by gestational age and maternal educational status

et al. 2020

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Background: Household incense burning is a common ritual behavior in the Asia-Pacific region but has been associated with inferior developmental outcomes in term infants. We aimed to examine these associations among preterm infants. Methods: Information from 1190 mother-infant pairs during 6-and 18-month follow-up to the Taiwan Birth Cohort Study was examined for associations between household incense burning exposure and infant neurodevelopmental milestone achievement using multivariable Cox proportional hazard model with propensity score weighting, along with stratified, sensitivity, and decomposition analysis.Results: Household incense burning exposure was associated with delayed gross motor milestone achievement among all preterm infants according to the Cox model and after propensity score weighting. Meanwhile, associations for delayed development were found in gross motor domain milestones among late preterm infants, while fine motor domain delay was found among other preterm infants. Furthermore, the associations between household incense burning status and gross motor milestone delays were attenuated by the interaction between higher education level and household incense burning exposure status.Conclusions: Household incense burning exposure was associated with delays, and the motor domains affected differed according to degree of prematurity. These | 661 WEI Et al.

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Incense Burning during Pregnancy and Birth Weight and Head Circumference among Term Births: The Taiwan Birth Cohort Study

Cited by 34 publications

References 46 publications

Ambient Temperature and Markers of Fetal Growth: A Retrospective Observational Study of 29 Million U.S. Singleton Births

Ambient Temperature and Markers of Fetal Growth: A Retrospective Observational Study of 29 Million U.S. Singleton Births

Associations between maternal exposure to incense burning and blood pressure during pregnancy

Associations between household incense burning and delayed motor development among preterm infants modified by gestational age and maternal educational status

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