RESUMO
To investigate the risk of gastric cancer development in subjects with atrophic and nonatrophic gastritis, we studied 221 consecutive gastric cancer patients and 7647 non-cancer subjects for whom endoscopic biopsy of the gastric mucosa was available. In gastritis patients, the relative risk (RR) estimates of gastric cancer were as follows: corpus atrophic gastritis RR = 8.7 (95% CI = 5.4-14.1), antral atrophic gastritis RR = 4.5 (2.4-8.1), chronic atrophic pangastritis RR = 7.6 (3.8-15.3), corpus nonatrophic gastritis RR = 1.6 (0.9-2.7), antral non-atrophic gastritis RR = 1.2 (0.7-2.3), and pangastritis RR = 1.3 (0.6-2.8). The latter was of borderline significance (p = 0.07). In peptic ulcer, a significant excess risk was calculated for subjects with either corpus atrophic gastritis (RR = 3.1 [2.5-3.9] or antral atrophic gastritis (RR = 3.5 [2.6-4.8]). For stomach polyps, the risk was significantly increased only in subjects with corpus atrophic gastritis (RR = 2.1 [1.3-3.5]). The risks for both peptic ulcer and polyps, however, were significantly increased in chronic atrophic pangastritis. A substantial excess risk of gastric cancer was found for atrophy in the corpus (RR = 20.9 [9.0-48.9]) and in the antrum (RR = 14.9 [5.3-41.9]). An increased risk of peptic ulcer was also confirmed in subjects with atrophy in the corpus (RR = 3.0 [1.3-6.9]) and in the antrum (RR = 4.9 [2.0-12.1]).
