Armstrong B G, Nolin A D, McDonald A D
School of Occupational Health, McGill University, Montreal, Quebec, Canada.
Br J Ind Med. 1989 Mar;46(3):196-9. doi: 10.1136/oem.46.3.196.
In a recent report on prematurity and work in pregnancy based on the Montreal survey noteworthy increases in both preterm births (less than 37 weeks) and infants of low birth weight (less than or equal to 2500 g) were found in women in certain specific occupations or whose work entailed heavy lifting, shift work, long hours, or great fatigue. Because of the large overlap between preterm births and low birth weight, the latter was further analysed with allowance for gestational age in order better to separate factors retarding fetal growth from those shortening gestation. The association of low birth weight with specific occupations, long working hours, and fatigue largely disappeared, suggesting that the effect of these factors was to shorten gestation. By contrast, the association with lifting heavy weights and with shift work persisted, suggesting that these factors retarded fetal growth as well as increasing the risk of preterm birth.
在一份基于蒙特利尔调查的关于早产与孕期工作的近期报告中，研究发现从事某些特定职业或工作需要搬运重物、轮班工作、长时间工作或极度疲劳的女性中，早产（少于37周）和低体重婴儿（小于或等于2500克）的数量显著增加。由于早产和低体重之间存在大量重叠，因此对低体重情况进一步按孕周进行分析，以便更好地区分阻碍胎儿生长的因素和缩短孕期的因素。低体重与特定职业、长时间工作和疲劳之间的关联在很大程度上消失了，这表明这些因素的作用是缩短孕期。相比之下，与搬运重物和轮班工作的关联仍然存在，这表明这些因素既阻碍胎儿生长，又增加早产风险。
