GPT and syphilis: Factors associated with positive anti-HCV were being MSM (aOR 2.11, 95% CI 1.26 to 3.55, p = 0.005), age > 30 years (aOR 1.54, 95% CI 1.10 to 2.17, p = 0.012), ALT ≥ 62.5 U/L (aOR 7.74, 95% CI 5.48 to 10.9, p <  0.001), CrCl < 60 ml/min (aOR 5.58, 95% CI 1.95 to 16.0, p = 0.001), and syphilis positive (aOR 1.95, 95% CI 1.36 to 2.78, p <  0.001).