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Table 1 Determinants of Markov states in the literature

From: Improving the evidence base of Markov models used to estimate the costs of scaling up antiretroviral programmes in resource-limited settings

Markov states defined by: Bachmann 2006 Badri et al 2006 Cleary et al 2006; 2008 Goldie et al 2006 Marseille et al 2006 Vijayaraghavan et al 2007
Baseline CD4 stratum   <200, 200-350, >350 <50, 50-200 <50; 50-200; 200-500; >500   
Current CD4 stratum <200, 200-350 <200, 200-350, >350   <50; 50-200; 200-500; >500   
Baseline viral load stratum     >100,000; 30,001-100,000; 10,001-30,000; 3,001-10,000; 501-3,000; 0-500   
Current viral load stratum     >100,000; 30,001-100,000; 10,001-30,000; 3,001-10,000; 501-3,000; 0-500   Suppressed; unsuppressed
Time on ART    0-3; 3-6; 6-12; 12-24; 24-36; >36 months    
First or second line ARV regimen   Yes Yes Yes Yes Yes
Disease staging or opportunistic infections Tuberculosis, other opportunistic infection, no opportunistic infection No-AIDS/ AIDS   Severe bacterial infection; severe fungal infection; severe malaria; tuberculosis; isosporiasis; cerebral toxoplasmosis; nontuberculous mycobacteriosis; other severe opportunistic infection; mild bacterial infection; mild fungal infection; other mild infection WHO Stages (1, 2, 3, 4) AIDS
Adverse events       Toxicity; no toxicity