CD4 and AIDS: Prior to 1997, only those with AIDS diagnoses are reported and consequently, the highest reporting rates are found in those with low CD4 counts of <200 cells/μL (1.11yr−1, 95% Cr I 0.89–1.51 for men in 1996 and 1.06yr−1, 95% Cr I 0.89–1.38 for women).