Document Classification

Section Type: METHODS

Text: 248 patients with Hp-associated active duodenal ulcer confirmed by endoscopy, 193 males and 55 females, were randomized to receive OAC (250) : omeprazole (0. 20 mg bid) + amoxicillin (1000 mg bid) + clarithromycin (250 mg bid), for 1 week (group A1) or 2 weeks (group A2) ; OAC (500) : omeprazole (0. 20 mg bid) + amoxicillin (1000 mg bid) + clarithromycin (500 mg bid), for 1 week (group B1) or 2 weeks (group B2) ; or OAM : omeprazole (0. 20 mg bid) + amoxicillin (1000 mg bid) + metronidazole (400 mg bid), for 1 week (group C1) or 2 weeks (group C2) respectively.