Abstract：
Shift work is a prevalent workplace exposure, which increases the possibility of unhealthy behaviours and circadian rhythm disruptions and elevates the risk of metabolic diseases and adverse reproductive outcomes. But its potential of increasing the risk of postpartum weight retention remains uncertain. This study aimed to investigate the association between maternal shift work prior to conception and postpartum weight retention, and to identify modifiable factors during pregnancy for prevention. We analysed data from the Taiwan Birth Cohort Study, a prospective cohort of Taiwanese women who gave birth in 2005. We examined the pre-conceptional shift work status of 13,575 mothers and their body weight before pregnancy, before delivery, six and eighteen months after delivery. We used multivariable linear models to examine associations and effect modifications. Maternal shift work before pregnancy was significantly associated with increased postpartum weight retention at six and eighteen months (β-estimate for six months: 0.19-kilogram, 95% CI: 0.03-0.34; eighteen months: 0.23-kilogram, 95% CI: 0.04-0.40). The association between shift work and weight retention at six months postpartum was stronger among mothers who were overweight or obese before pregnancy than mothers with normal weight. This study showed the impact of shift work on postpartum weight retention and suggested a stronger association among mothers with overweight or obesity before pregnancy.
摘要：
轮班工作是一种普遍的工作场所暴露，这增加了不健康行为和昼夜节律中断的可能性，并增加了代谢疾病和不良生殖结果的风险。但其增加产后体重保留风险的潜力仍不确定。这项研究旨在调查孕妇在怀孕前轮班工作与产后体重保留之间的关系。并确定怀孕期间的可改变因素以进行预防。我们分析了台湾出生队列研究的数据，2005年分娩的台湾女性的前瞻性队列。我们检查了13,575名母亲的概念前轮班工作状态及其怀孕前的体重，交货前,交货后六个月和十八个月。我们使用多变量线性模型来检查关联和效应修改。母亲在怀孕前轮班工作与六个月和十八个月的产后体重保留增加显着相关（六个月的β估计值：0.19千克，95%CI：0.03-0.34；18个月：0.23千克，95%CI：0.04-0.40）。与体重正常的母亲相比，怀孕前超重或肥胖的母亲在产后六个月的轮班工作与体重保留之间的关联更强。这项研究显示了轮班工作对产后体重保留的影响，并表明怀孕前超重或肥胖的母亲之间的关联更强。
