Treatment of new TB cases.

aTreatment success was defined as patients who did not experience failure, relapse, or within-trial mortality. For HIV-negative patients, our definition of treatment success varies slightly from Jindani [7] and Nunn [11] in that we assume that patients with doubtful or doubtfully favorable status are included in the treatment success category.bDefined as 6HE: $0.0692 times 168 days = $11.63; 4HR: $0.1152 times 112 days = $12.90.cInternal analysis conducted at the Infections Diseases Institute in Kampala, Uganda.