Dietrich M, French J A
Can Med Assoc J. 1974 Aug 3;111(3):235-7.
Three "indirect-type" slide tests utilizing the principle of hemagglutination inhibition and one new "direct-type" slide test employing direct agglutination were evaluated for their sensitivity in detecting human chorionic gonadotropin (HCG) in urine. The results of positive tests in a group of woman in very early pregnancy were correlated with the "days after last menses". In this series the direct slide test was the most accurate. A control must be used with each direct test to indicate interfering substances and when such are present a different test must be used. All tests were found to be of the relative sensitivity stated by the manufacturer.
对三项利用血凝抑制原理的“间接型”玻片试验和一项采用直接凝集的新型“直接型”玻片试验检测尿中人类绒毛膜促性腺激素（HCG）的敏感性进行了评估。一组早早孕女性的阳性试验结果与“末次月经后天数”相关。在该系列中，直接玻片试验最为准确。每次直接试验都必须使用对照来指示干扰物质，当存在此类物质时，必须使用不同的试验。发现所有试验的相对敏感性均如制造商所述。
