title: Longitudinal increases in waist circumference are associated with HIV-serostatus, independent of antiretroviral therapy.
abstract: BACKGROUND
  The relative contributions of the different classes of antiretroviral therapy (ART), HIV infection per se, and aging to body shape changes in HIV-infected patients have not been clearly defined in longitudinal studies.
  
  
  METHODS
  Since September 1999, men enrolled in the Multicenter AIDS Cohort Study have undergone measurements of body mass index (BMI) and body circumferences at each semi-annual visit. The effect of HIV-serostatus and cumulative exposure to the three major ART classes on changes in anthropomorphic measurements occurring between 1999 and 2004 among HIV-infected and HIV-uninfected men were determined using linear mixed effects regression models.
  
  
  RESULTS
  At baseline, average BMI and circumference measurements were greater in HIV-uninfected men (n = 392) than HIV-infected men (n = 661) (BMI, 27.3 versus 25.3 kg/m; waist, 96.4 versus 90.2 cm; hip 101.3 versus 95 cm, thigh 54.1 versus 50.8 cm; arm 33.3 versus 31.7 cm, P < 0.001 for each comparison). Cumulative nucleoside reverse transcriptase inhibitor (NRTI) exposure, but not protease inhibitor or non-nucleoside reverse transcriptase inhibitor exposure, was associated with statistically significant changes in BMI (-0.11 +/- 0.04 kg/m per year) and in circumferences of waist (-0.27 +/- 0.07 cm/year), hip (-0.24 +/- 0.05 cm/year), and thigh (-0.16 +/- 0.03 cm/year) over the 5 years of follow-up. Independent of ART exposure, HIV-infected men had a more rapid increase in waist circumference over the study interval than did the HIV-uninfected men (difference 0.33 +/- 0.15 cm/year, P = 0.02).
  
  
  CONCLUSIONS
  Cumulative NRTI therapy was associated with longitudinal decreases in body circumference measurements, whereas HIV-serostatus was associated with increases in waist circumference independent of ART.
authors: Division of Endocrinology and Metabolism, Johns Hopkins University, 1830 East Monument Street, Baltimore, MD 21287, USA. tbrown27@jhmi.edu
authors: Todd T
authors: TT
authors: Brown
authors: Haitao
authors: H
authors: Chu
authors: Zhaojie
authors: Z
authors: Wang
authors: Frank J
authors: FJ
authors: Palella
authors: Lawrence
authors: L
authors: Kingsley
authors: Mallory D
authors: MD
authors: Witt
authors: Adrian S
authors: AS
authors: Dobs
mesh_terms: D000328:Adult; D000886:Anthropometry / Q000379:methods; D019380:Anti-HIV Agents / Q000009:adverse effects / Q000627:therapeutic use; D023241:Antiretroviral Therapy, Highly Active; D001824:Body Constitution / Q000187:drug effects; D015992:Body Mass Index; D005500:Follow-Up Studies; D017320:HIV Protease Inhibitors / Q000009:adverse effects / Q000627:therapeutic use; D006679:HIV Seropositivity / Q000188:drug therapy / Q000473:pathology*; D039682:HIV-Associated Lipodystrophy Syndrome / Q000139:chemically induced / Q000473:pathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D018894:Reverse Transcriptase Inhibitors / Q000009:adverse effects / Q000627:therapeutic use
chemical_list: D019380:Anti-HIV Agents; D017320:HIV Protease Inhibitors; D018894:Reverse Transcriptase Inhibitors