HP and ulcer disease: The results showed that 71.57% of HP-positives had ulcers with the diameter of 0~1 cm, which was significantly higher than that of HP-negative patients, 28.43% of HP-positives had ulcers with the diameter ≥ 1 cm, which was significantly lower than that in HP-negative patients, and the difference was statistically significant (P < 0.05).