Breakdown of per patient costs by cost item during the first year on treatment at six ART treatment sites in Zambia.

ART: antiretroviral therapy; ARV: antiretroviral; USD: United States dollar.aOutpatient visits include the cost of staff time for staff who conduct patient consultations.bFixed costs include the cost of buildings and infrastructure, equipment, supplies, vehicles, and staff time for staff in ART clinic who do not conduct patient consultations.