分享

夜班工作与女性乳腺癌的发生风险

 SIBCS 2020-08-27

  由于褪黑激素抑制或者昼夜节律中断,夜班工作似乎可以影响乳腺癌的发生风险,但是流行病学证据尚无定论。

  2019年5月29日,英国癌症研究基金会、英国《自然》旗下《英国癌症杂志》在线发表伦敦大学癌症研究院的大数据分析报告,调查了夜班工作与女性乳腺癌的发生风险。

  作者将英国世代研究队列超过113700例年龄≥16岁女性的连续调查问卷,与国家医疗服务登记中心数据库进行关联,推算过去10年以来夜班工作者相关乳腺癌发生风险比和95%置信区间,并对其他影响因素进行校正(年龄、出生年代、良性乳房疾病史、一级亲属乳腺癌家族史、社会经济评分、出生体重、成年身高、哺乳史、绝经前口服避孕药史、饮酒史、吸烟史、体育运动、绝经后体重指数、绝经后激素补充史、绝经与否、绝经年龄)。

  结果,2003~2014年进入该研究队列的无癌女性共计102869例,经过中位随访9.5年,截至2018年3月27日,发生乳腺浸润癌2059例夜班工作(进入研究队列前10年内经常于晚上10时至上午7时上班工作)与非夜班工作的女性相比,乳腺癌发生风险总体相似(风险比:1.00,95%置信区间:0.86~1.15,P=0.96)。虽然女性乳腺癌发生风险与每周夜班工作平均时数显著成正比(P=0.035),但是与以下衡量指标无显著相关性:

  • 每天夜班工作平均时数(P=0.62)

  • 每周夜班工作平均天数(P=0.066)

  • 累计夜班工作年数(P=0.51)

  • 累计夜班工作时数(P=0.51)

  • 不再夜班工作年数(P=0.38)

  • 夜班工作职业类型(P=0.20)

  • 开始夜班工作年龄(P=0.89)

  • 首次生育前开始夜班工作(P=0.73)

  • 首次生育后开始夜班工作(P=0.90)

  因此,该研究结果表明,夜班工作与英国女性乳腺癌的发生风险总体缺乏相关性,并且与夜班工作量、持续时间、强度的衡量指标无显著相关性,除了每周夜班工作平均时数

相关阅读

Br J Cancer. 2019 May 29. [Epub ahead of print]

Night shift work and risk of breast cancer in women: the Generations Study cohort.

Michael E. Jones, Minouk J. Schoemaker, Emily C. McFadden, Lauren B. Wright, Louise E. Johns, Anthony J. Swerdlow.

The Institute of Cancer Research, London, UK; University of Oxford, Oxford, UK.

BACKGROUND: It is plausible that night shift work could affect breast cancer risk, possibly by melatonin suppression or circadian clock disruption, but epidemiological evidence is inconclusive.

METHODS: Using serial questionnaires from the Generations Study cohort, we estimated hazard ratios (HR) and 95% confidence intervals (95%CI) for breast cancer in relation to being a night shift worker within the last 10 years, adjusted for potential confounders.

RESULTS: Among 102,869 women recruited in 2003-2014, median follow-up 9.5 years, 2059 developed invasive breast cancer. The HR in relation to night shift work was 1.00 (95%CI: 0.86-1.15). There was a significant trend with average hours of night work per week (P=0.035), but no significantly raised risks for hours worked per night, nights worked per week, average hours worked per week, cumulative years of employment, cumulative hours, time since cessation, type of occupation, age starting night shift work, or age starting in relation to first pregnancy.

CONCLUSIONS: The lack of overall association, and no association with all but one measure of dose, duration, and intensity in our data, does not support an increased risk of breast cancer from night shift work in women.

DOI: 10.1038/s41416-019-0485-7

    转藏 分享 献花(0

    0条评论

    发表

    请遵守用户 评论公约

    类似文章 更多