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Comparative analysis of HIV screening test and confirmation test results#br# |
GUO Huijuan1 CHEN Xun1 ZHANG Yinqiang2 GONG Yaoyao3 ZHENG Ying1 WANG Fengmei1 LI Qi1 |
1.Center for Clinical Laboratory, Xiyuan Hospital, Chinese Academy of Traditional Chinese Medicine, Beijing 100091, China;
2.Department of Hepatology, Xiyuan Hospital, Chinese Academy of Traditional Chinese Medicine, Beijing 100091, China;
3.School of Medical Laboratory, Hebei North University, Heibei Province, Zhangjiakou 075031, China |
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Abstract Objective To analyze the results of the human immunodeficiency virus (HIV) antibody screening test and confirmation test, and to explore the reasons for false positives in the screening test. Methods From January 2017 to December 2019, a total of 184 HIV antibody screening-positive patients in Xiyuan Hospital, Chinese Academy of Traditional Chinese Medicine were sent to the confirmation laboratory for confirmation test, the test results were analyzed and statistics, and the characteristics and causes of false positive patients were explored. Results The false positive rate of HIV antibody screening increased year by year from 2017 to 2019, and the difference was statistically significant (P < 0.05). The screening test values of false-positive patients were concentrated in a relatively low interval, and the specimens with a screening value of 1≤S/CO<10 confirm that the verification was indeed all false positives; the false-positive rate decreased with the increase of S/CO value, and the specimens with S/CO≥100 were confirmed to be all positive. False positive patients have different basic medical histories. Among them, infection, cardiovascular and cerebrovascular diseases, autoimmune diseases, etc. interfered with the screening experiment to a certain extent, leading to the appearance of false positives. Conclusion For HIV antibody screening positive patients with relatively low S/CO, attention should be paid to the patient’s basic medical history and personal condition, whether there is interference in the test, and reasonable communication and explanation to the patient to reduce the patient’s psychological burden.
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