Effect of hepatitis C coinfection on discontinuation and modification of initial HAART in primary HIV care.
OBJECTIVE
To estimate the effect of hepatitis C (HCV) coinfection on time to first occurrence of either discontinuation or modification of initial HAART among previously antiretroviral therapy-naive HIV-infected patients.


METHODS
The analysis included antiretroviral therapy-naive patients who initiated HAART prior to November 2003 and were participating in the University of North Carolina Center for AIDS Research, HIV/AIDS observational clinical cohort. The effect of HCV status on time to first occurrence of either HAART discontinuation or modification was assessed using Kaplan-Meier survival estimates and multivariable proportional hazards regression was used to estimate hazard ratios.


RESULTS
Of 296 patients initiating HAART, 22% were coinfected with HCV. During a median follow-up of 473 days [interquartile range (IQR), 167-940] from HAART initiation, 104 (35%) patients discontinued and 91 (31%) modified their first regimen. Reasons for discontinuation and modification were comparable by HCV serostatus and included treatment failure (12%), toxicity (41%), and barriers to adherence (47%). The median time to first occurrence of either discontinuation or modification among HCV-infected patients was 401 days (IQR, 128-821), and among HCV-uninfected patients was 493 days (IQR, 204-952) (P = 0.22). After adjustment for baseline demographic and clinical characteristics, the hazard ratio contrasting HCV-infected with HCV-uninfected patients was 1.39 (95% confidence interval, 0.95-2.03; P = 0.09).


CONCLUSIONS
HCV coinfection was only marginally associated with a shorter duration of an initial HAART regimen, suggesting optimization of a first HAART regimen may not appreciably depend on HCV serostatus.
Hooshyar
Dina
D
Division of Infectious Diseases, School of Medicine, University of North Carolina at Chapel Hill, North Carolina 27599-7215, USA.
Napravnik
Sonia
S
Miller
William C
WC
Eron
Joseph J
JJ
D000328:Adult; D000368:Aged; D023241:Antiretroviral Therapy, Highly Active; D015331:Cohort Studies; D005260:Female; D015658:HIV Infections / Q000150:complications / Q000188:drug therapy*; D019698:Hepatitis C, Chronic / Q000150:complications*; D006801:Humans; D008297:Male; D008875:Middle Aged; D016019:Survival Analysis; D013997:Time Factors; D017211:Treatment Failure; D016312:Treatment Refusal