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by H. Hunter Handsfield, M.D., Aug 11, 2010 11:11PM
Welcome to the forum, and aloha. (This reply originates from my place at Poipu Beach, Kaua'i.) Directly to your questions.
1) It is correct that more recent research has suggested a higher proportion of false negatives with rapid testing than previously realized. My recollection is that it's around 15%, i.e. meaning a negative result remains at least 85% reliable. However, the newer studies were rather small, and there is a large margin of error. To my knowledge the exact reasons are not known. However, false negative results do not occur repeatedly in the same person; so two negative results with rapid tests is virtually 100% reliable.
2) The window period ("time line") is about the same for the lab-based and rapid tests. 8 weeks usually is conclusive.
http://www.medhelp.org/posts/HIV-Prevention/Re-HIV-Testing-Clarification/show/1315890
早期85%的准确率。但8周就和联酶差不多了。
1)快速法在早期(8周前)只有85%的准确率(如果以8周作为窗口期,那就相当于假阴率高达15%,尤其是口快速检测(OraQuick)),而且假阳率也较高。
2)快速法一般用在有紧急性和移动性要求的情况(如急诊室、流动检测等等)
3)不论如何,快速法总体的准确率是比酶联法等方法低一些的。但是,尽管如此,8周后的检测结果是确信的(8 weeks usually is conclusive),包括快速法和其他可靠的方法。
H. Hunter Handsfield的窗口期是8周。
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