Factors associated with detectable viral load (viral load >100 copies/ml) in patients on antiretroviral therapy for more than six months in Swaziland, 2012–2013.

1 The adjusted ORs are those from the final model, and include control for clustering by health facility.2ART = antiretroviral therapy.3 Median time on ART in undetectable group was 2.7 years (95% CI 1.4–4.4).4 WHO = World Health Organisation.5 ‘Unknown’ categories are included when >1% of values are missing. Having a missing value for time on ART, WHO Clinical Stage, last C4 count, TB co-infection status or ART regimen was associated with increased likelihood of detectable VL. These patients were excluded from the final regression model (see methods and S1 Table).Factors associated with detectable viral load (viral load >100 copies/ml) in patients on antiretroviral therapy for more than six months in Swaziland, 2012–2013.