Figure 1.

Unadjusted Kaplan-Meier survival curves showing the proportions remaining frailty-free among individuals with summed CD4 T-cell IL-2 response in the upper tertile (>2.5%, dashed lines) and in the bottom two tertiles (≤2.5%, solid lines). Data are presented separately for HIV-uninfected (HIV-) nonfrail men (left) and HIV-infected (HIV+) nonfrail men (right). The P-values obtained from log-rank tests are shown. Hash marks and the numbers above indicate censoring times and the numbers of individuals lost, respectively.