Monitoring strategies.

ART, antiretroviral therapy; VL, viral load; tVL, targeted viral load; m, monthly; POC, point-of-care; Lab, laboratory-basedPOC VL tests are assumed to be qualitative with a detection limit of 5000 copies/ml; lab-VL tests are assumed to be fully quantitative2x = second confirmatory measurement 3 months after first observation needed* The information from these visits/tests is not used to decide about switching to second-line** The probability of having a test is 50%Monitoring strategies.ART（antiretroviral therapy，抗反转录病毒治疗）；VL（viral load，病毒载量）；tVL（targeted viral load，靶向病毒载量）；m（monthly，每月）；POC（point-of-care，床旁检测）；Lab（laboratory-based，实验室检测）。假定床旁病毒载量检测为定性检测，检测限为5000拷贝/毫升；实验室病毒载量检测为完全定量检测。2x代表首次观测后3个月需开展的第二次确认检测*。本次随访或检测获取的信息不用于决策是否切换至二线治疗方案**。接受检测的概率为50%。监测策略。