The risk of death or severe HIV-related illness was lower with early ART than with deferred ART ( adjusted hazard ratio , 0.56 ; 95 % CI , 0.41 to 0.76 ; adjusted hazard ratio among patients with a baseline CD4 + count of 500 cells per cubic millimeter , 0.56 ; 95 % CI , 0.33 to 0.94 ) and lower with IPT than with no IPT ( adjusted hazard ratio , 0.65 ; 95 % CI , 0.48 to 0.88 ; adjusted hazard ratio among patients with a baseline CD4 + count of 500 cells per cubic millimeter , 0.61 ; 95 % CI , 0.36 to 1.01 ) .