Men who have sex with men in Great Britain: comparison of a self-selected internet sample with a national probability sample
Men who have sex with men in Great Britain: comparison of a self-selected internet sample with a national probability sample
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DOI：
10.1136/sti.2006.023283
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发表时间：
2007-06-01
影响因子：
3.6
通讯作者：
Elford, Jonathan
中科院分区：
文献类型：
--
作者：
Evans, Alison Ruth;Wiggins, Richard D.;Elford, Jonathan
目的：比较通过互联网招募的自选、方便的男男性行为者 (MSM) 样本与英国全国概率调查中抽取的 MSM 的特征。方法：2003 年 5 月和 6 月通过英国两个流行的男同性恋网站招募互联网样本 (n = 2065)。该样本与来自全国性态度和生活方式调查 (n = 117) 的 MSM (n = 117) 进行比较。 Natsal），是 1999 年 5 月至 2001 年 2 月期间对英国成年人居民进行的概率抽样调查。结果：样本之间在一系列社会人口统计和行为变量方面没有观察到显着差异（p < 0.05）。然而，互联网样本中的男性更年轻（p < 0.001），更有可能是学生（p = 0.001），但居住在伦敦（p = 0.001）或报告健康状况良好（p = 0.014）的可能性较小。尽管两个样本报告 HIV 检测的可能性相同，但互联网样本中的男性更有可能报告过去一年中性传播感染（16.9% vs 4.8%，调整后优势比 4.14，95% CI 1.76 至 9.74；p = 0.001）、肛交（76.9% vs 63.3%；p = 0.001）和无保护肛交过去 3 个月内的性行为（45% vs 36.6%；p = 0.064）。 结论：互联网提供了一种招募自选、方便的 MSM 样本的方法，其社会和人口特征与全国概率调查中抽取的 MSM 大致相似。然而，基于互联网便利样本对高风险性行为的估计可能会高估更广泛的 MSM 人群中性风险行为的水平。
Objectives: To compare the characteristics of a self-selected, convenience sample of men who have sex with men ( MSM) recruited through the internet with MSM drawn from a national probability survey in Great Britain.Methods: The internet sample ( n = 2065) was recruited through two popular websites for homosexual men in Great Britain in May and June 2003. This sample was compared with MSM ( n = 117) from the National Survey of Sexual Attitudes and Lifestyles ( Natsal), a probability sample survey of adults resident in Great Britain conducted between May 1999 and February 2001.Results: No significant differences were observed between the samples on a range of sociodemographic and behavioural variables ( p < 0.05). However, men from the internet sample were younger ( p < 0.001) and more likely to be students ( p = 0.001), but less likely to live in London ( p = 0.001) or report good health ( p = 0.014). Although both samples were equally likely to report testing for HIV, men from the internet sample were more likely to report a sexually transmitted infection in the past year ( 16.9% v 4.8%, adjusted odds ratio 4.14, 95% CI 1.76 to 9.74; p = 0.001), anal intercourse ( 76.9% v 63.3%; p = 0.001) and unprotected anal intercourse in the past 3 months ( 45% v 36.6%; p = 0.064).Conclusions: The internet provides a means of recruiting a self-selected, convenience sample of MSM whose social and demographic characteristics are broadly similar to those of MSM drawn from a national probability survey. However, estimates of high-risk sexual behaviour based on internet convenience samples are likely to overestimate levels of sexual risk behaviour in the wider MSM population.