RESUMO
INTRODUCTION AND OBJECTIVE: Inclusion of direct-acting antivirals into clinical practice in patients with chronic HCV (CHC) has been a milestone in medicine. PATIENTS AND METHODS: Analytical, prospective study, involving 126 patients with chronic HCV treated with direct-acting antivirals. Efficacy and safety of treatment and factors associated with failure treatment were evaluated. RESULTS: Age 54±10. Male (70%). Cirrhosis (60%). Distribution according to genotypes: G1a (31%), G1b (42%); G3 (14%); G4 (13%). Child-Pugh B and C (n=15). Naïve (56%). SVR rate was (87.3%): Child-A (91%), Child-B (75%) and Child-C (60%). The best cure rates were achieved with a 3D/2D±ribavirin (SVR=97.4%;n=39) and sofosbuvir/ledipasvir±ribavirin (RVS=93.1%; n=29) combination. An SVR rate of <90% was achieved with sofosbuvir+simeprevir±ribavirin (SVR=88%, n=25), simeprevir+daclatasvir±ribavirin 73%, n=15). The association of ribavirin to these last three therapeutic options (n=19) improved cure rates (SVR=94.7%, 18/19) compared to its absence (n=39;SVR=77%). Improvement in MELD (40%). Output transplant list (20%). Substitutions associated with resistors NS3: G1a (positions 80K; n=5); G1b and G4 (position 168 and 36; n=4), while for NS5a: G1a (position 30; n=2) and G1b and G3 (position 93; n=3). Variables associated with failure in multivariate analysis (p<0.05): presence of ascites, G3 and ribavirin dosage<600mg/day. DISCUSSION: The presence of genotype 3, ascites or dosage of ribavirin<600mg/day were associated with higher failure rates. The use of ribavirin>600mg/day in cirrhotic G1 or G3, who will be treated with sofosbuvir+simeprevir or daclatasvir is recommended where no baseline resistance test is available.