Fig. 2From: Multi-state models for the analysis of time-to-treatment modification among HIV patients under highly active antiretroviral therapy in Southwest EthiopiaDuration on treatment before switch in months. a Duration in original treatment combination before switch, b Duration in original NRTI before switch, and c Duration in original NNRTI before switch. Note that only the time spent in the current treatment combination of the patients who modified their treatment are consideredBack to article page