Mazella 1994.

Methods	Allocation concealment: adequate (sealed envelopes). Blinding: no. Intention to treat: no. Methodological score: 13.
Participants	NAIVE PATIENTS WITH CHRONIC HEPATITIS C Arms: 30/30 Excluded: 1/0 Mean age: 45/48 % males: 68/50 % transfusion: NDA % drug abuse: NDA % cirrhosis: NDA Genotypes: NDA Disease duration: 5/5
Interventions	Experimental: Alfa‐n‐1 IFN 3 MU TIW x 12 mo Control: no intervention Follow‐up: 16 mo
Outcomes	‐ biochemical ETR and SR
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment?	Low risk	A ‐ Adequate