Fig. 2. Heat maps of the ICER of POC-CD4₁₂ relative to CLIN.

Heat maps of multi-way sensitivity analysis in the rural setting display the ICER of POC-CD4₁₂ relative to CLIN. Three panels are displayed, each showing results using different costs for POC-CD4 tests. On each panel, POC-CD4₁₂ random error increases left to right along the horizontal axes, and POC-CD4₁₂ bias becomes more negative down the vertical axes. The POC-CD4₁₂ base case value (from Scott et al [15], a POC-CD4 meta-analysis) is marked with an X. Other published estimates of POC-CD4 test bias and random error are marked with a cross (Diaw et al [35]), a four-pointed star (Glencross et al [22]), a circle (Jani et al, capillary [36]), a diamond (Jani et al, venous [36]), and a five-pointed star (Mtapuri et al [37]). LAB, laboratory; POC, point-of-care; ICER, incremental cost-effectiveness ratio; GDP, per capita gross domestic product.