Chronic Disease Research Centre, The University of the West Indies, Bridgetown, Barbados.
BMC Womens Health. 2013 Dec 27;13:53. doi: 10.1186/1472-6874-13-53.
The aim of this study was to establish the prevalence and risk factors for intergenerational (IG)-sex in females aged 15-19 residing in Barbados.
This cross sectional cluster survey was conducted in a 2.6% national sample in the age range (n = 261) recruited from multiple polling districts chosen with a probability proportional to size. Consent was obtained from participants aged ≥18 years or from parents/guardians of participants <18 years, with participant assent. The prevalence of age at first sex was analyzed using a life table approach and risk factors for IG sex (defined as sexual relations with a male 10 or more years older) were analyzed by logistic regression, adjusting for age.
51.0% of adolescent females in the survey reported ever having had sex, among whom prevalence of IG-sex was 13.2% (95% CI: 6.7-19.8) at first sex, 29.0% (22.3-35.7) within the preceding twelve months, and 34.8% (24.3-45.4) ever. Condom use at first sex was positively related to willingness to have sex (F statistic = 9.8, p = 0.001). The strongest determinant for IG-sex was age of sexual debut (age adjusted Odds Ratio [95% CI]: 0.58[0.41-0.83]), followed by money or gifts received from the partner (2.91[1.17-7.23] and self-esteem (0.33[0.11-0.95]).
The survey establishes a high rate of IG-sex in Barbados, a 'high income' country. Most insightful is that risk of IG-sex nearly halved for every year at which first sex was delayed. A high proportion of coerced sex was reported at first sexual experience and this was linked to poor condom use. Affirmative prevention approaches are recommended to boost self-acclamation of adolescent women within less coercive relationships, especially during their first sexual encounter.
本研究旨在确定巴巴多斯 15-19 岁女性中代际（IG）性的流行率和危险因素。
本横断面聚类调查在全国范围内进行，从按大小成比例选择的多个投票区中招募了年龄在（n=261）范围内的 2.6%的样本。对于 18 岁及以上的参与者，或对于 18 岁以下的参与者，获得了父母/监护人的同意，同时获得了参与者的同意。使用生命表方法分析首次发生性行为的年龄，通过逻辑回归分析 IG 性行为（定义为与年龄大 10 岁或以上的男性发生性关系）的危险因素，调整年龄因素。
调查中 51.0%的青春期女性报告曾有过性行为，其中首次性行为时 IG 性行为的流行率为 13.2%（95%CI：6.7-19.8），前 12 个月内为 29.0%（22.3-35.7），而首次性行为时为 34.8%（24.3-45.4）。首次发生性行为时使用避孕套与愿意发生性行为呈正相关（F 统计量=9.8，p=0.001）。IG 性行为的最强决定因素是性初潮年龄（调整后的年龄比值比[95%CI]：0.58[0.41-0.83]），其次是从伴侣那里获得的金钱或礼物（2.91[1.17-7.23]）和自尊心（0.33[0.11-0.95]）。
该调查确定了巴巴多斯的 IG 性行为发生率很高，这是一个“高收入”国家。最有意义的是，首次发生性行为的年龄每推迟一年，IG 性行为的风险几乎减半。首次性经历时报告了很大比例的被迫性行为，这与避孕套使用不当有关。建议采用积极的预防方法，增强青春期女性在较少受胁迫关系中的自我肯定，尤其是在首次发生性行为时。
