858023.fig.001
Figure 1: Proportion of semesters with CD4 cell count determinations of patients ineligible for antiretroviral therapy by duration of follow-up. Patients were divided into four groups according to their follow-up period: less than one year, one to two years, two to three years, and more than three years. The percentages indicate the proportion of semesters in which these patients had a CD4 cell count determination.