Figure 3.

PDR association with previous antiretroviral exposure in a multivariable model. A multivariable logistic regression model to explore associations between PDR to (a) NNRTIs and to (b) the preferred first-line ART option (efavirenz + tenofovir + emtricitabine) with demographic and clinical variables was applied to each sub-region. Variables considered included: age, sex, log plasma viral load, CD4 count, HIV transmission risk factor, marital status, level of education, employment and presence of AIDS-associated clinical symptoms. Associations with prior exposure to antiretroviral drugs are shown as aOR with 95% CI. EFV, efavirenz; TDF, tenofovir; FTC, emtricitabine.