CD4 and tuberculosis: Of the 2800, 342 patients (63 patients had prevalent TB, while 279 had extreme variables, 246 had a BMI ≤ 15 or ≥ 40, while 21 had a CD4+ > 1500 cells/mm3 and 12 had an age <0 years of age) were excluded, leaving 2458 patients who were considered for the final analysis (Fig. 1).