Chesang Jacqueline, Richardson Ann, Potter John, Coope Pat
School of Health Sciences, University of Canterbury, Christchurch.
School of Health Sciences, University of Canterbury, Christchurch; Preventive and Social Medicine, University of Otago, Dunedin.
N Z Med J. 2016 Oct 28;129(1444):58-67.
To estimate the prevalence of contraceptive use among New Zealand women and to measure changes in contraceptive use since the last population-based prevalence estimates were published in 1988.
Nine hundred and four women, aged 35-69 years were randomly selected from the electoral roll. A postal questionnaire was used to gather information on contraceptive use, socio-demographic characteristics and risk factors for ovarian cancer. Data were collected in 2013-2015. Estimates of current and ever-use of contraceptives were made and compared with the findings of the 1988 study by Paul et al. In both studies, participants were members of the control arm of case-control studies.
The study by Paul et al had a response proportion of 84%, whereas that of the current study was 47%. Oral contraceptives had the highest prevalence of ever-use among women aged 35-69 years (89% [347/389]), followed by condom use (54% [211/389]) and vasectomy (44% [170/389]). Compared to the previous study, there has been an increase in ever-use of condoms (24% [185/767] to 64% [148/231]), vasectomy (26% [202/767] to 40% [92/231]) and oral contraceptives (75% [575/767] to 89% [205/231]) among women aged 35-54 years. In contrast, a lower prevalence of tubal ligation (22% [168/767] to 8% [19/231]) was observed.
The study demonstrates a change in patterns of contraceptive use among women aged 35-54 years. The prevalence of ever-use of oral contraceptives and vasectomy remains high in New Zealand compared with other countries.
估计新西兰女性使用避孕药具的比例，并衡量自1988年上次基于人群的患病率估计公布以来避孕药具使用情况的变化。
从选民名册中随机抽取904名年龄在35 - 69岁之间的女性。通过邮寄问卷收集有关避孕药具使用、社会人口学特征和卵巢癌风险因素的信息。数据收集于2013 - 2015年。对当前和曾经使用避孕药具的情况进行了估计，并与Paul等人1988年的研究结果进行了比较。在这两项研究中，参与者均为病例对照研究对照组的成员。
Paul等人的研究回复率为84%，而本研究的回复率为47%。在35 - 69岁的女性中，口服避孕药的曾经使用率最高（89% [347/389]），其次是使用避孕套（54% [211/389]）和输精管切除术（44% [170/389]）。与之前的研究相比，35 - 54岁女性中避孕套的曾经使用率有所上升（从24% [185/767]升至64% [148/231]），输精管切除术的曾经使用率有所上升（从26% [202/767]升至40% [92/231]），口服避孕药的曾经使用率有所上升（从75% [575/767]升至89% [205/231]）。相比之下，观察到输卵管结扎的使用率较低（从22% [168/767]降至8% [19/231]）。
该研究表明35 - 54岁女性的避孕药具使用模式发生了变化。与其他国家相比，新西兰口服避孕药和输精管切除术的曾经使用率仍然很高。
