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. 2014 Sep 16;11(9):e1001725. doi: 10.1371/journal.pmed.1001725

Figure 1. Schematic comparing two strategies for immunological staging after HIV diagnosis: LAB-CD4 and POC-CD4.

Figure 1

In both LAB-CD4 and POC-CD4, literature-based probabilities are shown for: completing a laboratory CD4 test, receiving the test result, and successful initiation of care (Table 1). Probability of linkage depends on ART eligibility as determined by the “true CD4 count,” as well as the “observed CD4 count” test result (T) [14]. Bolded branches denote where the outcomes result in linkage to care. T+, observed CD4 count ≤250/µl; T−, observed CD4 count>250/µl.