BACKGROUND: In December 2009, the Department of Health and Human Services guidelines for initiation of antiretroviral therapy (ART) changed to include patients with CD4 counts between 350 and 500 cells/µL. The aims of this study were to assess uptake of this recommendation in ART-naive youth with human immunodeficiency virus (HIV) and to describe the epidemiology of transmitted genotypic drug resistance mutations (DRMs) in this population. METHODS: A multicenter, retrospective cohort study of ART initiation in ART-naive youth was performed. Eligible subjects were 13-25 years of age, were diagnosed with HIV within 1 year of presentation to care at the study sites, and presented to care from January 2007 to June 2011. RESULTS: Of 685 potential subjects identified, 331 (49%) fulfilled inclusion criteria. Mean CD4 count at presentation to care was 452 cells/µL. Overall, 191 (58%) subjects started ART. The mean CD4 count at ART initiation was 261 cells/µL before and 363 cells/µL after the 2009 guideline change (P < .0001). Of 212 (64%) subjects with resistance testing available prior to ART initiation, 38 (18%) subjects had a major DRM and an increased proportion of resistance was seen in later study years. CONCLUSIONS: Our study demonstrated an uptake in recently changed guideline recommendations to treat HIV-infected individuals at higher CD4 counts and reinforces the importance of performing resistance testing at entry into care, as 18% of our population had major DRMs prior to initiation of ART.
BACKGROUND: In December 2009, the Department of Health and Human Services guidelines for initiation of antiretroviral therapy (ART) changed to include patients with CD4 counts between 350 and 500 cells/µL. The aims of this study were to assess uptake of this recommendation in ART-naive youth with human immunodeficiency virus (HIV) and to describe the epidemiology of transmitted genotypic drug resistance mutations (DRMs) in this population. METHODS: A multicenter, retrospective cohort study of ART initiation in ART-naive youth was performed. Eligible subjects were 13-25 years of age, were diagnosed with HIV within 1 year of presentation to care at the study sites, and presented to care from January 2007 to June 2011. RESULTS: Of 685 potential subjects identified, 331 (49%) fulfilled inclusion criteria. Mean CD4 count at presentation to care was 452 cells/µL. Overall, 191 (58%) subjects started ART. The mean CD4 count at ART initiation was 261 cells/µL before and 363 cells/µL after the 2009 guideline change (P < .0001). Of 212 (64%) subjects with resistance testing available prior to ART initiation, 38 (18%) subjects had a major DRM and an increased proportion of resistance was seen in later study years. CONCLUSIONS: Our study demonstrated an uptake in recently changed guideline recommendations to treat HIV-infected individuals at higher CD4 counts and reinforces the importance of performing resistance testing at entry into care, as 18% of our population had major DRMs prior to initiation of ART.
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