The reate of ulcer recurrence and H pylori status after follow up time (n=52) Ulcer status HP status Ulcer No ulcer OR (95% CI) p Possitive n 13 7 27, 85 (4, 39 - 282, 60) <0, 01% 65 35 Negative n 2 30% 6, 3 93, 7 Tổng 15 37 Comment: There was a relationship between H pylorirecurrence after eradication treatment and ulcer recurrence. Patients with H pyloripositive after eradication treatment had a 27.85 times higher risk of ulcer recurrence (95% CI: 4, 39 - 282, 60) compared to patients with H pylorinegative after eradication treatment, p<0, 01.