Maternal employment and atopic dermatitis in children: a prospective cohort study

Authors

  • I.J. Wang,

    1. Department of Pediatrics, Taipei Hospital, Department of Health, Taipei, Taiwan
    2. China Medical University, Taichung, Taiwan
    3. National Yang-Ming University, Taipei, Taiwan
    4. Fu Jen Catholic University, Taipei, Taiwan
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  • H.J. Wen,

    1. Department of Environmental and Occupational Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
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  • T.L. Chiang,

    1. Institute of Health Policy and Management, National Taiwan University College of Public Health, Taipei, Taiwan
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  • S.J. Lin,

    1. Department of Pediatrics, National Cheng Kung University Hospital and College of Medicine, National Cheng Kung University, Tainan, Taiwan
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  • P.C. Chen,

    1. Institute of Occupational Medicine and Industrial Hygiene, National Taiwan University College of Public Health, Taipei, Taiwan
    2. Department of Public Health, National Taiwan University College of Public Health, Taipei, Taiwan
    3. Department of Environmental and Occupational Medicine, National Taiwan University College of Medicine and National Taiwan University Hospital, Taipei, Taiwan
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  • Y.L. Guo

    1. Department of Environmental and Occupational Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
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  • Funding sources
    This study was supported by grants from the Bureau of Health Promotion, Department of Health (BHP-PHRC-92-4, DOH93-HP-1702) and the National Science Council of Taiwan (NSC 98-2314-B-192-001-MY3).

  • Conflicts of interest
    None declared.

  • P.C.C. and Y.L.G. contributed equally to this article.

Pau-Chung Chen.
E-mail: pchen@ntu.edu.tw
Yueliang Leon Guo.
E-mail: leonguo@ntu.edu.tw

Summary

Background  Considering the early onset of atopic dermatitis (AD), which most often arises in the first year of life, risk factors occurring very early in life must be considered. Little is known about the effects of maternal occupational exposure on the development of atopic disorders in children.

Objectives  The aim of this study was to evaluate associations between maternal employment and childhood AD.

Methods  We used multistage stratified systematic sampling to recruit 24 200 mother–newborn pairs from the Taiwan national birth register. Information on maternal occupation categories, work stress, working time, shift work and potential confounders during pregnancy was gathered by questionnaires after birth. At 3 years of age, information on the development of AD was assessed by home interviews. Multiple logistic regression analysis was performed to estimate the association of maternal employment and AD.

Results  Overall, 11 962 out of 19 381 mothers (61·7%) worked during pregnancy. The children of mothers who worked during pregnancy had an increased risk of AD compared with those whose mothers did not work [odds ratio (OR) 1·38, 95% confidence interval (CI) 1·25–1·53]. The children of mothers with a professional or technical occupation had a higher risk of AD (OR 1·64, 95% CI 1·44–1·87). The risk of AD was found to increase with maternal work stress during pregnancy in a dose–response manner (Ptrend < 0·01). The mothers of children with AD had a longer working time than those without AD (< 0·0001). However, no significant association between AD and maternal shift work was found.

Conclusions  Working in professional or technical occupations increased the risk of childhood AD in addition to work stress during pregnancy.

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