Kalichman S C, Simbayi L C, Cain D, Jooste S
University of Connecticut, Storrs, CT 06269, USA.
Sex Transm Infect. 2009 Oct;85(6):411-5. doi: 10.1136/sti.2008.035287. Epub 2009 May 7.
Anal intercourse is an efficient mode of HIV transmission and may play a role in the heterosexual HIV epidemics of southern Africa. However, little information is available on the anal sex practices of heterosexual individuals in South Africa.
To examine the occurrence of anal intercourse in samples drawn from community and clinic settings.
Anonymous surveys collected from convenience samples of 2593 men and 1818 women in two townships and one large city sexually transmitted infection (STI) clinic in Cape Town. Measures included demographics, HIV risk history, substance use and 3-month retrospective sexual behaviour.
A total of 14% (n = 360) men and 10% (n = 172) women reported engaging in anal intercourse in the past 3 months. Men used condoms during 67% and women 50% of anal intercourse occasions. Anal intercourse was associated with younger age, being unmarried, having a history of STI, exchanging sex, using substances, having been tested for HIV and testing HIV positive.
Anal intercourse is reported relatively less frequently than unprotected vaginal intercourse among heterosexual individuals. The low prevalence of anal intercourse among heterosexual individuals may be offset by its greater efficiency for transmitting HIV. Anal sex should be discussed in heterosexual HIV prevention programming.
肛交是艾滋病病毒传播的一种有效方式，可能在南部非洲的异性恋艾滋病流行中起作用。然而，关于南非异性恋者肛交行为的信息很少。
研究从社区和诊所采集的样本中肛交的发生情况。
对开普敦两个城镇和一家大型城市性传播感染（STI）诊所的2593名男性和1818名女性的便利样本进行匿名调查。测量内容包括人口统计学、艾滋病病毒风险史、物质使用情况以及3个月内的回顾性性行为。
共有14%（n = 360）的男性和10%（n = 172）的女性报告在过去3个月内有过肛交行为。男性在67%的肛交场合使用了避孕套，女性为50%。肛交与年龄较小、未婚、有性传播感染史、交换性行为、使用物质、接受过艾滋病病毒检测以及检测呈阳性有关。
在异性恋者中，肛交的报告频率相对低于无保护的阴道性交。异性恋者中肛交的低流行率可能因其更高的艾滋病病毒传播效率而被抵消。在异性恋艾滋病预防规划中应讨论肛交问题。
