Patients originating from Germany, on ART, and with CD4 + cell counts ≥ 200 cells/μl had the best outcome (TB-free survival 99.9%) while lowest TB-free survival rate (16.7% survival rate; p = 0.001) was seen among patients without ART, originating from Sub-Saharan Africa and with a CD4 + cell count < 200 cells/μl. Here, CD4 is linked to tuberculosis.