Unstratified and stratified observed and weighted median (interquartile range) CD4+ cell counts for years 1, 4, 7 and 10 after start of antiretroviral therapy and the percentage of patients with weighted CD4+ cell count >500/μL at year 10.

<p>HIV: human immunodeficiency virus, ART: antiretroviral therapy, ADI: AIDS defining illness.</p>a<p>Age at the start of ART.</p>b<p>Reported mode of HIV risk exposure was categorized injection drug users (IDU) and not IDU.</p>c<p>Pre-treatment CD4+ cell count and HIV RNA were defined as the value closest to the date of start of ART up to 6 months prior.</p>d<p>Initial ART regimen was classified as NNRTI-based or PI-based. Integrase inhibitor-based regimens were too few (N = 75) to draw consistent conclusions and were thus excluded.</p>e<p>ADI at the start of ART was defined as the presence of any CDC 1993 condition at six months prior to up to one month after start of ART.</p>f<p>Hepatitis B/C co-infection was defined as having chronic infection at the start of ART.