CD4 and tuberculosis: TB incidence rates were 14.7 in the lowest CD4+ count stratum (≤200 cells/uL), 3.1 in the middle CD4+ count stratum (201–350 cells/uL) and 2.9 in the highest CD4+ count stratum (>350 cells/uL) when using all available CD4+ counts and performing a date of measurement analysis (table 3).