CD4 and hepatitis C virus infection: In univariable linear regression analyses, a significant predictive value was seen only for BMI (β = 2.028, p = 0.005, CI = 0.642–3.414) with no significant predictive value seen for other parameters associated with the development of IR in HIV: age, gender, ethnicity (Caucasian vs. non-Caucasian), current or nadir CD4 T cell count, HIV RNA, Hepatitis C infection, duration of HIV infection, or history of protease inhibitor or nucleoside reverse transcriptase inhibitor zidovudine or stavudine use.