Amoateng Acheampong Yaw, Kalule-Sabiti Ishmael
School of Research and Post-Graduate Studies, Faculty of Human and Social Sciences,North-West University (Mafikeng Campus),South Africa.
J Biosoc Sci. 2016 Jan;48(1):20-36. doi: 10.1017/S0021932014000492. Epub 2014 Dec 9.
Survival analysis - specifically the actuarial life-table method and the Cox Proportional Hazards model - was used to assess Bronfenbrenner's bio-ecological model with regards to the onset of sexual intercourse in a random sample of 1697 grade 9 and grade 11 pupils in the North West Province of South Africa. Data were collected in July and August 2007. Of the contextual factors examined, only academic performance and community disorganization were found to be statistically significantly associated with age at first sexual intercourse amongst girls. High academic performance by girls is positively associated with age at first sexual intercourse, while girls who live in disorganized communities initiate sexual intercourse earlier than their counterparts in other communities. Age is negatively associated with the timing of first sexual debut among both girls and boys. Males initiate sexual intercourse earlier than females, while youths with at least one sexual partner are much more likely to initiate sexual intercourse earlier than those without sexual partners.
生存分析——具体而言是精算生命表法和Cox比例风险模型——被用于在南非西北省随机抽取的1697名九年级和十一年级学生样本中，评估布伦芬布伦纳的生物生态模型与首次性交开始时间的关系。数据于2007年7月和8月收集。在所考察的背景因素中，仅发现学业成绩和社区失序与女孩首次性交年龄在统计学上有显著关联。女孩的高学业成绩与首次性交年龄呈正相关，而生活在失序社区的女孩比其他社区的女孩更早开始性交。年龄与女孩和男孩首次性交的时间呈负相关。男性比女性更早开始性交，而至少有一个性伴侣的青少年比没有性伴侣的青少年更早开始性交的可能性要大得多。
