SynthesisOccupational and environmental medicine2013
Work activities and risk of prematurity, low birth weight and pre-eclampsia: an updated review with meta-analysis.
Synthesis in Occupational and environmental medicine, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 64 papers, 10 of them syntheses that pooled 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.
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.
Who cites it
64 citing papers in PubMed, 10 syntheses or guidelines pooled it.
- The consequences of a compressed workweek: a systematic literature review.International archives of occupational and environmental health · 2025Pooled it
- Physical job demands in pregnancy and associated musculoskeletal health and employment outcomes: a systematic review.American journal of obstetrics and gynecology · 2024Pooled it
- The maternal factors associated with infant low birth weight: an umbrella review.BMC pregnancy and childbirth · 2024Pooled it
- Pregnancy, obstetrical and neonatal outcomes in women exposed to physician-related occupational hazards: a scoping review.BMJ open · 2023Pooled it
- Maternal Occupational Risk Factors and Preterm Birth: A Systematic Review and Meta-Analysis.Public health reviews · 2023Pooled it
- Psychosocial work exposures and health outcomes: a meta-review of 72 literature reviews with meta-analysis.Scandinavian journal of work, environment & health · 2021Pooled it
- Pooled it
- Systematic review of interventions targeting sickness absence among pregnant women in healthcare settings and workplaces.BMJ open · 2018Pooled it
- Non-occupational physical activity during pregnancy and the risk of preterm birth: a meta-analysis of observational and interventional studies.Scientific reports · 2017Pooled it
- Reproductive disorders among cosmetologists and hairdressers: a meta-analysis.International archives of occupational and environmental health · 2016Pooled it
- Occupational Reproductive Health Risks Among Women Healthcare Workers: A Narrative Review for Clinical Surveillance, Preconception Counseling, and Prevention.Journal of clinical medicine · 2026Review
- Prediction of hypertensive disorders of pregnancy in advanced-age pregnant women using SHAP value and XGBoost.Scientific reports · 2026Article
- Development of a quantitative job exposure matrix for standing, walking, and forward bending among pregnant workers - The PRECISE JEM.Scandinavian journal of work, environment & health · 2025Article
- Absence during pregnancy in the Danish workforce: occupational, industrial, and temporal trends in a nationwide register-based cohort study.Scandinavian journal of work, environment & health · 2025Article
- Is Sitting Really the New Smoking? Health of North American Workers Exposed to Prolonged Static Standing.New solutions : a journal of environmental and occupational health policy : NS · 2025Article
- Use of benefits during pregnancy: a cohort study in four organisations in Spain.BMJ public health · 2025Article
- Occupational Physical Activity Among Pregnant Employees in the Danish Workforce: The PRECISE Occupational Cohort Profile.Clinical epidemiology · 2025Article
- Article
- Multiple Job Holding, Job Changes, and Associations with Gestational Diabetes and Pregnancy-Related Hypertension in the National Birth Defects Prevention Study.International journal of environmental research and public health · 2024Article
- Impact of maternal posture on fetal physiology in human pregnancy: a narrative review.Frontiers in physiology · 2024Review
4 more citing papers are in PubMed but not listed here.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
5 authors.
Funding
Abstract
objectivesWe assessed the evidence relating preterm delivery (PTD), low birth weight, small for gestational age (SGA), pre-eclampsia and gestational hypertension to five occupational exposures (working hours, shift work, lifting, standing and physical workload). We conducted a systematic search in Medline and Embase (1966 to 2011), updating a previous search with a further 6 years of observations.
methodsAs before, combinations of keywords and medical subject headings were used. Each relevant paper was assessed for completeness of reporting and potential for important bias or confounding, and its effect estimates abstracted. Where similar definitions of exposure and outcome existed we calculated pooled estimates of relative risk (RR) in meta-analysis.
resultsAnalysis was based on 86 reports (32 cohort investigations, 57 with usable data on PTD, 54 on birth weight and 11 on pre-eclampsia/gestational hypertension); 33 reports were new to this review. For PTD, findings across a substantial evidence base were generally consistent, effectively ruling out large effects (eg, RR>1.2). Larger and higher quality studies were less positive, while meta-estimates of risk were smaller than in previous analyses and best estimates pointed to modest or null effects (RR 1.04 to 1.18). For SGA, the position was similar but meta-estimates were even closer to the null (eight of nine RRs ≤ 1.07). For pre-eclampsia/gestational hypertension the evidence base remains insufficient.
conclusionsThe balance of evidence is against large effects for the associations investigated. As the evidence base has grown, estimates of risk in relation to these outcomes have become smaller.
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Registered trials
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.