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A, Percentages of CD4+ T cells negative for CD28 by age and HIV infection status. B, Percentages of CD8+ T cells negative for CD28 by age and HIV infection status. Mean (95% CI) %CD28- are presented for HIV-infected adults through 144 weeks posttreatment; median (IQR) %CD28- are presented for HIV-uninfected adults ≤30 years (n = 24) and ≥45 years (n = 24), who had flow cytometry data measured at one time point. Abbreviations: CI, confidence interval; IQR, interquartile range.
