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Table 4 Adjusted cox proportional hazard model for blip participants compared to controls

From: Factors associated with HIV viral load “blips” and the relationship between self-reported adherence and efavirenz blood levels on blip occurrence: a case–control study

Characteristics Blip group
N (%) or mean (SD)
Control group
N (%) or mean (SD)
Multivariate hazard ratio (95 % CI) P value
Number, n 99 673   
Mean age at ART (years) 34.4 (14.9) 32.9 (13.4) 1 (0.98,1.02) 0.9737
Race
 Caucasian 38 (38.4) 267 (39.7) Ref  
 African-American 49 (49.5) 278 (41.3) 1.14 (0.73,1.78) 0.5773
 Other 12 (12.1) 128 (19.0) 0.68 (0.35,1.35) 0.2727
Viral load at ART initiation (log10 copies/mL) 4.8 (0.9) 4.5 (1.0) 1.42 (1.08,1.88) 0.0123
CD4 cell count at ART initiation (cells/µL)
 0–350 64 (68.1) 305 (49.7) Ref  
 350 to <500 22 (23.4) 190 (30.9) 0.64 (0.39,1.05) 0.0793
 ≥500 8 (8.5) 119 (19.4) 0.45 (0.22, 0.95) 0.0365
Self-reported antiretroviral drug adherence (%)
 ≥85 96 (98.0) 637 (96.2) Ref  
 <85 2 (2.0) 25 (3.8) 0.5 (0.12, 2.04) 0.3335
  1. Data expressed as N (%) or mean (SD)
  2. ART antiretroviral therapy