Purpose
About a third of untreated, perinatally HIV-infected children reach adolescence. We evaluated the durability and effectiveness of non-nucleoside reverse transcriptase inhibitor (NNRTI)-based antiretroviral therapy (ART) in this population.
Methods
Data from perinatally HIV-infected, antiretroviral-naïve patients initiated on NNRTI-based ART aged 10–19 years who had ≥6 months of follow-up were analyzed. Competing risk regression was used to assess predictors of NNRTI substitution and clinical failure (WHO stage 3/4 event or death). Viral suppression was defined as a viral load <400 copies/ml.
Results
Data from 534 adolescents met our inclusion criteria (56.2% female; median age at treatment initiation 11.8 years). After five years of treatment, median height-for-age z-score increased from −2.3 to −1.6 and median CD4+ cell count increased from 131 to 580 cells/mm3. The proportion of patients with viral suppression after 6 months was 87.6% and remained >80% up to five years of follow-up. NNRTI substitution and clinical failure occurred at rates of 4.9 and 1.4 events per 100 patient-years, respectively. Not using cotrimoxazole prophylaxis at ART initiation was associated with NNRTI substitution (HR 1.5 versus using, 95%CI 1.0–2.2, p=0.05). Baseline CD4+ count ≤200 cells/mm3 (HR 3.3 versus >200, 95%CI 1.2–8.9, p=0.02) and not using cotrimoxazole prophylaxis at ART initiation (HR 2.1 versus using, 95%CI 1.0–4.6, p=0.05) were both associated with clinical failure.
Conclusions
Despite late ART initiation, adolescents achieved good rates of catch-up growth, CD4+ count recovery, and virological suppression. Earlier ART initiation and routine cotrimoxazole prophylaxis in this population may help to reduce current rates of NNRTI substitution and clinical failure.