Figure 1From: Further benefits by early start of HIV treatment in low income countries: Survival estimates of early versus deferred antiretroviral therapyMarkov state transition diagram illustrating the life cycle model used to calculate the effects of the three alternative interventions. Each oval represents a health state in the Markov model. During each successive year, patients may continue in their present health state, die from HIV or age related death (and transition to a death state). Patients not initiating HAART may also jump to lower CD4 states.Back to article page