A range of parameters varied in one-way sensitivity analyses are displayed on the vertical axis. The ICER (US dollars/YLS) of POC-CD4 compared to LAB-CD4 is represented on the x-axis. The solid vertical line indicates the ICER of the base case (US$500/YLS). The dashed vertical line represents the per capita GDP of Mozambique (MOZ GDP), i.e., the “very cost-effective” threshold; the dotted vertical line represents three times GDP, i.e., the “cost-effective” threshold. For each parameter, the horizontal bar represents the range of ICERs that result from varying that parameter along the range of values indicated in the parentheses; the first value listed in the parentheses is the one that results in the lowest ICER. Of all one-way sensitivity analyses, the ICER of POC-CD4 compared to LAB-CD4 crosses the cost-effectiveness threshold (into the area of not being cost-effective) (US$1,710/YLS) only when point-of-care CD4 test cost is>US$1,100/test or when repeat HIV testing or immunologic staging are completed every 9 mo or more frequently.