CD4 and AIDS: Treatment-experienced participants were less likely to be concerned about AIDS or complications (OR 0.45, 95% CI 0.23–0.89), whereas participants aged below 30 years (OR 4.76, 95% CI 1.66–13.64), those who had attained post-secondary level education (OR 2.08, 95% CI 1.11–3.88), and who had a CD4 cell count lower than 500 cells/uL (OR 2.02, 95% CI 1.06–3.84), expressed concerns about the risk of developing AIDS or related complications after or during trial participation.