Lee Shui-Shan, Lee Cheuk-Kwong, Wong Ngai-Sze, Wong Hoi-Yin, Lee Krystal C K
Stanley Ho Centre for Emerging Infectious Diseases, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong, People's Republic of China.
Hong Kong Red Cross Blood Transfusion Service, Hong Kong, People's Republic of China.
Blood Transfus. 2014 Apr;12(2):166-71. doi: 10.2450/2013.0103-13. Epub 2013 Nov 15.
The prevalence of human immunodeficiency virus (HIV) in men having sex with men (MSM) is generally higher than that in the average adult male population. In Hong Kong a permanent deferral mechanism is in place to minimise viral transmission during the window period. As regards donor deferral, the attitudes and behaviours of MSM in the community are crucial to ensuring blood safety.
A web-based questionnaire was constructed in the Chinese language. Through online advertisement and the assistance of outreach workers, sexually active MSM were recruited to participate in the survey. The questionnaire was composed of items on: (i) demographics, (ii) history and frequency of blood donations, (iii) profile of sexual practice, and (iv) views on time-limited vs permanent deferral.
Over a 6-week period in 2012, 250 MSM, three-quarters of whom were aged between 16 and 30 years old, were recruited. Almost half (47.6%) gave a history of blood donation. The majority (75.6%) were repeat donors, one-third of whom gave blood every 3-6 months. Compared to non-donors, a higher proportion of blood donors had had anal sex and multiple partners in the preceding year, while their condom usage rate was similar. Current donors were inclined to agree with time-limited deferral. With the latter's implementation, the number of donors would increase, but the compliance rate might vary widely.
Blood donation is common among MSM in Hong Kong. The risk of HIV transmission depends largely on their compliance with the deferral mechanism applied, irrespectively of whether it is permanent or time-limited.
男男性行为者（MSM）中人类免疫缺陷病毒（HIV）的流行率通常高于成年男性平均人群。在香港，有一项永久性延期机制以尽量减少窗口期内的病毒传播。关于献血者延期，社区中男男性行为者的态度和行为对于确保血液安全至关重要。
用中文构建了一份基于网络的问卷。通过在线广告和外展工作人员的协助，招募性活跃的男男性行为者参与调查。问卷包括以下方面的内容：（i）人口统计学，（ii）献血历史和频率，（iii）性行为概况，以及（iv）对限期延期与永久性延期的看法。
在2012年的6周时间里，招募了250名男男性行为者，其中四分之三年龄在16至30岁之间。近一半（47.6%）有献血史。大多数（75.6%）是重复献血者，其中三分之一每3至6个月献血一次。与未献血者相比，献血者中在前一年有肛交和多个性伴侣的比例更高，而他们的避孕套使用率相似。当前的献血者倾向于同意限期延期。随着限期延期的实施，献血者数量会增加，但依从率可能差异很大。
在香港，男男性行为者中献血很常见。HIV传播风险在很大程度上取决于他们对所应用的延期机制的依从性，无论该机制是永久性的还是限期性的。
