Paid work, domestic work, and other determinants of pregnancy outcome in Ibadan, southwest Nigeria

Omokhodion, Folashade O.; Onadeko, Modupe O.; Roberts, Olumuyiwa A.; Beach, Jeremy; Burstyn, Igor; Cherry, Nicola

doi:10.1016/j.ijgo.2010.06.016

Cited by 18 publications

(26 citation statements)

References 24 publications

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“…Sample sizes varied from small (<50) to extremely large (>350,000), but 57% of the 353 effect estimates across both reviews (Tables S1 to S7) were based on findings from >1000 births. Response rates at baseline (cross-sectional studies) or follow-up (cohort studies) often exceeded 80%-90%, but were <65% or unclear in 21 reports 25-6,32,34-5,37,47,51-4,59,65,79,85,87,89,90,92-3,98…”

Section: Resultsmentioning

confidence: 99%

Work activities and risk of prematurity, low birth weight and pre-eclampsia: an updated review with meta-analysis

et al. 2013

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Objectives We assessed the evidence relating pre-term delivery (PTD), low birthweight, 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 (1966–2011), updating a previous search with a further six years of observations. Methods As before, combinations of keywords and MeSH terms 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 in meta-analysis. Results Analysis was based on 86 reports (32 cohort investigations, 57 with usable data on PTD, 54 on birthweight 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 (e.g. RR>1.2). Larger and higher quality studies were less positive, while meta-estimates of risk were smaller than previously 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. Conclusions The 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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Section: Resultsmentioning

confidence: 99%

Work activities and risk of prematurity, low birth weight and pre-eclampsia: an updated review with meta-analysis

et al. 2013

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“…The remaining evidence is primarily based on case-control studies and cross-sectional surveys with results pointing in different directions (10)(11)(12)(13)(14)(15)(16)(17)(18)(19). Finally, two recent cross-sectional studies from Asia and Africa draw attention to the need for continuous concern for the working environment of pregnant women: a recent cross-sectional study from South Korea supported a potential association between occupational heavy lifting and miscarriage (4), and, in Nigeria, work-related physical exertion was associated with preterm birth while lifting of heavy objects at home was associated with low birth weight (20).…”

mentioning

confidence: 99%

“…The physiological changes that occur during physical exertion are associated with an acute reduction in the maternal-fetal blood flow (3,(21)(22)(23). In addition to this transitory vascular effect, occupational biomechanical exposures (such as quiet standing, frequent bending, or heavy lifting) may cause protracted reductions in the uterine blood flow, even if the exposures are intermittent (2)(3)(4)(20)(21)(22)(23)(24)(25)(26).…”

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confidence: 99%

Occupational lifting during pregnancy and risk of fetal death in a large national cohort study

Juhl¹,

Strandberg‐Larsen²,

Larsen³

et al. 2012

Scand J Work Environ Health

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“…Exposure is common among vehicle and heavy machine operators in industry, construction, agriculture, forestry and transportation 12 13 and involves about 1%-2% of all working women in Sweden [14][15][16] and the UK. 17 WBV exposure has previously been associated with adverse birth outcomes in a few epidemiological studies [18][19][20] and changes in uterine blood flow and hormone levels in an animal experimental study. 21 Yet, there is only one small study (case control, n=102 cases of preeclampsia and n=99 cases of gestational hypertension) assessing the risk of hypertensive disorders during pregnancy in relation to WBV exposure, which showed inconclusive results.…”

Section: Workplacementioning

confidence: 99%

Occupational exposure to whole-body vibrations and pregnancy complications: a nationwide cohort study in Sweden

et al. 2020

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ObjectivesPregnancy complications are common contributors to perinatal mortality and morbidity. Still, the cause(s) of gestational hypertensive disorders and diabetes are largely unknown. Some occupational exposures have been inconsistently associated with pregnancy complications, but exposure to whole-body vibrations (WBV) has been largely overlooked even though it has been associated with adverse birth outcomes. Therefore, the aim was to assess whether occupational WBV exposure during pregnancy is associated with pregnancy complications in a nationwide, prospective cohort study.MethodsThe Fetal Air Pollution Exposure cohort was formed by merging multiple Swedish, national registers containing information on occupation during pregnancy and diagnosis codes, and includes all working women who gave birth between 1994 and 2014 (n=1 091 044). WBV exposure was derived from a job-exposure matrix and was divided into categories (0, 0.1–0.2, 0.3–0.4 and ≥0.5 m/s2). ORs with 95% CIs were calculated using logistic regression adjusted for potential confounders.ResultsAmong women working full time (n=646 490), we found increased risks of all pregnancy complications in the highest exposure group (≥0.5 m/s2), compared with the lowest. The adjusted ORs were 1.76 (95% CI 1.41 to 2.20), 1.55 (95% CI 1.26 to 1.91) and 1.62 (95% CI 1.07 to 2.46) for preeclampsia, gestational hypertension and gestational diabetes, respectively, and were similar in all sensitivity analyses. There were no clear associations for part-time workers.ConclusionsThe results suggest that women should not be exposed to WBV at/above the action limit value of 0.5 m/s2 (European directive) continuously through pregnancy. However, these results need further confirmation.

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Paid work, domestic work, and other determinants of pregnancy outcome in Ibadan, southwest Nigeria

Abstract: The results further support recommendations that physical exertion in paid and domestic work should be reduced during pregnancy.

Cited by 18 publications

References 24 publications

Work activities and risk of prematurity, low birth weight and pre-eclampsia: an updated review with meta-analysis

Work activities and risk of prematurity, low birth weight and pre-eclampsia: an updated review with meta-analysis

Occupational lifting during pregnancy and risk of fetal death in a large national cohort study

Occupational exposure to whole-body vibrations and pregnancy complications: a nationwide cohort study in Sweden

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