JAMA Oncol:口服避孕药使用时间与卵巢,子宫内膜,乳腺癌和结肠直肠癌之间的关系

2019-06-15 不详 网络

虽然口服避孕药(OC)的使用很常见,但OC使用对癌发生的影响尚未完全清楚。最近的医疗保健研究和质量报告指出,需要了解OC亚群的使用和癌症关联的一致性,包括吸烟者和肥胖妇女。本研究旨在确定生活方式特征是否会影响OC使用持续时间与特定癌症风险之间的关联。预期的NIH-AARP饮食与健康研究(1995-1996,随后至2011年),在6个州和2个大都市地区以人口为基础招募AARP成员。所有分析均包括至少

虽然口服避孕药(OC)的使用很常见,但OC使用对癌发生的影响尚未完全清楚。最近的医疗保健研究和质量报告指出,需要了解OC亚群的使用和癌症关联的一致性,包括吸烟者和肥胖妇女。本研究旨在确定生活方式特征是否会影响OC使用持续时间与特定癌症风险之间的关联。

预期的NIH-AARP饮食与健康研究(1995-1996,随后至2011年),在6个州和2个大都市地区以人口为基础招募AARP成员。所有分析均包括至少有10万名报告在入学时使用OC的女性。在随访期间,我们确定了1241例卵巢,2337例子宫内膜,11114例乳腺癌和3507例结肠直肠癌病例。数据分析于2016年9月至2017年4月期间进行。

使用OC的持续时间为从不或<1年[参考],1-4,5-9或≥10年。主要研究结果为卵巢癌,子宫内膜癌,乳腺癌和直肠癌的发生。通过改良生活方式特征检查了效果改变:吸烟,饮酒,体重指数(BMI)和身体活动。使用Cox模型校正了年龄,种族,初潮年龄和感兴趣的修饰符。

结果显示,分析人群在入组时年龄为50至71岁(中位数,62岁),大部分为白人(91%)和绝经后(96%)。对于卵巢癌,OC使用相关的风险降低随着使用持续时间而增强(长期使用OC [≥10年] HR,0.60; 95%CI,0.47-0.76; P <.001趋势),并且在改良时相似生活方式因素中相似(长期使用OC,0.66; 95%CI,0.56-0.78;趋势P <.001)。子宫内膜癌的风险降低随着使用时间的延长而增强(长期使用OC,0.66; 95%CI,0.56-0.78;趋势P <.001);最明显的减少是在吸烟者的长期OC用户(HR,0.47; 95%CI,0.25-0.88),肥胖BMIs(0.36; 95%CI,0.25-0.52)和很少运动(HR, 0.40; 95%CI,0.29-0.56)。 OC使用与乳腺癌和结肠直肠癌之间的关联主要是无效的。

综上所述,该研究结果表明长期使用OC一直与生活方式因素导致的卵巢癌风险降低有关。我们观察到患有慢性病风险的女性(即吸烟者,肥胖BMI)的子宫内膜癌风险降低最大。对于一系列具有不同基线癌症风险的女性,口服避孕药的使用可能对化学预防有益。

原始出处:

Michels KA, Pfeiffer RM, et al., Modification of the Associations Between Duration of Oral Contraceptive Use and Ovarian, Endometrial, Breast, and Colorectal Cancers. JAMA Oncol. 2018 Apr 1;4(4):516-521. doi: 10.1001/jamaoncol.2017.4942.


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