Risk factors for early miscarriage among Chinese: a hospital-based case-control study

Xu, Guo; Wu, Yiming; Yang, Li‐Ming; Yuan, Lijun; Guo, Huijun; Zhang, Fuqing; Guan, Yichun; Wu, Yao

doi:10.1016/j.fertnstert.2014.02.013

Cited by 37 publications

(64 citation statements)

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“…Published 2017. This article is a U.S. Government work and is in the public domain in the USA Paediatric and Perinatal Epidemiology, 2018, 32, [19][20][21][22][23][24][25][26][27][28][29] It is also possible that some induced terminations may have been reported as pregnancy losses due to stigma associated with intentionally terminating a pregnancy. 1,30,33 However, for misreporting of induced terminations as pregnancy losses to have accounted for our findings, the degree of this misreporting would have had to have increased over the study period.…”

Section: Discussionmentioning

confidence: 99%

“…maternal age), adjusting or stratifying for these factors did not completely attenuate the increasing risk of pregnancy loss we observed during 1990–2011, though RR estimates were smaller in magnitude in some cases. Results also may be due in part to temporal shifts in maternal characteristics and pregnancy‐related factors that were not included in this analysis such as maternal health status and behaviours at the time of pregnancy, many of which are not captured in the NSFG (e.g. body mass index, alcohol/drug use, dietary intake, physical activity, presence or history of infections, history of induced abortion, stress and mental health factors, pre‐pregnancy contraceptive history), paternal characteristics, as well as environmental exposures …”

Section: Commentmentioning

confidence: 99%

“…Recent trends in reported pregnancy loss have not been described, particularly for the full age range of reproductive women. Furthermore, factors related to the risk of pregnancy loss, such as maternal age and health-related characteristics, 9,[17][18][19][20] have shifted over time since 2000. Subsequently, we examined trends in self-reported pregnancy loss and early pregnancy loss (<12 weeks) and estimated associations between various maternal characteristics and pregnancy loss for over 42 000 pregnancies occurring during 1990-2011, as reported in the NSFG.…”

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Trends in Risk of Pregnancy Loss Among US Women, 1990–2011

Rossen

Ahrens

Branum

2017

Paediatric Perinatal Epid

157

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Background: Pregnancy loss can have physical and psychological consequences for women and their families. Though a previous study described an increase in the risk of self-reported pregnancy loss from 1970 to 2000, more recent examinations from population-based data of US women are lacking. Methods: We used data from the 1995, 2002,[2006][2007][2008][2009][2010][2011][2012][2013][2014][2015] National Survey of Family Growth on selfreported pregnancy loss (miscarriage, stillbirth, ectopic pregnancy) among US women (15-44 years) who reported at least one pregnancy conceived during 1990-2011 that did not result in induced termination (n = 20 012 women; n = 42 526 pregnancies). Trends in the risk of self-reported pregnancy loss and early pregnancy loss (<12 weeks) were estimated, separately, by year of pregnancy conception (limited to 1990-2011 to ensure a sufficient sample of pregnancies for each year and maternal age group) using log-Binomial and Poisson models, adjusted for maternal-and pregnancy-related factors. Results: Among all self-reported pregnancies, excluding induced terminations, the risk of pregnancy loss was 19.7% and early pregnancy loss was 13.5% during 1990-2011. Risk of pregnancy loss increased by a relative 2% (rate ratio [RR] 1.02, 95% confidence interval [CI] 1.01, 1.02) per year in unadjusted models and 1% per year (RR 1.01, 95% CI 1.00, 1.02) during 1990-2011, after adjustment for maternal characteristics and pregnancy-related factors. In general, trends were similar for early pregnancy loss. Conclusion: From 1990 to 2011, risk of self-reported pregnancy loss increased among US women. Further work is needed to better understand the drivers of this increase in reported pregnancy loss in the US.

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Section: Discussionmentioning

confidence: 99%

Section: Commentmentioning

confidence: 99%

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confidence: 99%

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Trends in Risk of Pregnancy Loss Among US Women, 1990–2011

Rossen

Ahrens

Branum

2017

Paediatric Perinatal Epid

157

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“…Such study collected prospective detailed data on physical exertion as well as data on potential confounders of a large group including women employed in a variety of occupations, whereas the present study only questioned respondents’ current occupation classifying it into 5 categories. Several studies [15, 18, 47] also reported that occupation was not associated with SA, with possible explanation being that in developed countries there was a high social security for people in labor market; another speculation could be that different occupation posed same risks and these risks outweighed each other.…”

Section: Discussionmentioning

confidence: 99%

“…Compared to income and education, employment status was controversial and information as to whether adverse effects of occupation affect spontaneous abortion was scant. A couple of studies demonstrated that employment increased the risk of SA, but more studies reported no association between employment and spontaneous abortion [10, 15, 18, 20]. In addition, lifestyle factors were significant associated with female’s reproductive health, such as tea drinking, alcohol consumption and smoking [21–26].…”

Section: Introductionmentioning

confidence: 99%

Factors associated with spontaneous abortion: a cross-sectional study of Chinese populations

Zheng

et al. 2017

Reprod Health

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BackgroundSpontaneous abortion (SA) is one of the prevalent negative reproductive outcomes among women around the world, which is a great challenge faced by maternal health promotion. The present study is aimed to explore the association between SA and socioeconomic status (SES) and provides reference for policy makers to improve strategies on maternal health promotion.MethodsA cross-sectional analysis was conducted with baseline data from a large-scale population-based cohort study of 0.5 million people from 10 geographically diverse areas of China recruited from 2004 to 2008. The study collected data from 84,531 women aged 35–45 years old in the baseline survey of China Kadoorie Biobank. Participants were interviewed using a standardized questionnaire, and information on demographic-socioeconomic as well as reproductive health status was collected. Odds ratios (OR) with 95% CI, estimated by a multistep logistic regression, were used to approximate the associations between SA occurrence and characteristics of SES. A stratification analysis was also applied to find out how SES influenced women’s reproductive health outcomes differently between rural and urban areas. The model was adjusted for age at study date, tea consumption, alcohol consumption, cigarette smoking, and number of induced abortion.ResultsThe risk of SA in rural was 1.68 times greater than in urban (AOR = 1.68, 95%CI: 1.54–1.84). Women with high income had a decreased risk of SA when compared with that of women with low income (AOR = 0.90, 95%CI: 0.84–0.97). Compared with women in low educational attainment, women in higher educational attainment had a lower prevalence of SA (AOR = 0.90, 95%CI: 0.82–0.98). The risk of SA only reduced in factory worker (AOR = 0.59, 95%CI: 0.53–0.66) and professional worker (AOR = 0.75, 95%CI: 0.66–0.84) compared with agriculture and related workers. After stratifying by rural/urban, the association between income and SA in urban (AOR = 0.88, 95%CI: 0.78–0.99) was stronger than that in rural (AOR = 0.92, 95%CI: 0.84–1.00). Association between education and SA was found in urban (AOR = 0.66, 95%CI: 0.55–0.78) but not in rural (AOR = 1.05, 95%CI: 0.34–1.17), and there was no difference on how occupation impacted SA among women between the two subgroups.ConclusionsGenerally women with lower SES status had a higher risk of SA. Lower income and educational attainment were inversely associated with the risk of SA. Women with agricultural and related work had a significantly higher prevalence of SA. Interventions could be targeted more on women with low SES to increase both health profits as well as economic gains for health programs.Electronic supplementary materialThe online version of this article (doi:10.1186/s12978-017-0297-2) contains supplementary material, which is available to authorized users.

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Environmental exposure to bisphenol analogues and unexplained recurrent miscarriage: A case-control study

Huo

Zhang

et al. 2022

Environmental Research

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Risk factors for early miscarriage among Chinese: a hospital-based case-control study

Cited by 37 publications

References 43 publications

Trends in Risk of Pregnancy Loss Among US Women, 1990–2011

Trends in Risk of Pregnancy Loss Among US Women, 1990–2011

Factors associated with spontaneous abortion: a cross-sectional study of Chinese populations

Environmental exposure to bisphenol analogues and unexplained recurrent miscarriage: A case-control study

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