CD4 and Kaposi's sarcoma: In log-binomial models, patients with KS were more likely to fail to achieve a 50 cells/mm3 increase (RR 1.43; 95% CI: 0.99–2.06) and 100 cells/mm3 increase (RR 1.20; 95% CI: 0.84–1.73) in CD4 count at 6- and 12-months on treatment respectively (Table 3).