Body mass index, serum total cholesterol, and risk of gastric high-grade dysplasia: A case-control study among Chinese adults.

Obesity is related to an increased risk of gastric cardia cancer. However, the influences of excess body weight and serum total cholesterol on the risk of gastric high-grade dysplasia have not been fully characterized.A case-control study was conducted to explore the relationships between body mass index (BMI), serum total cholesterol level, and the risk of gastric high-grade dysplasia in Chinese adults. A total of 893 consecutive patients with gastric high-grade dysplasia (537 men and 356 women) and 902 controls (543 men and 359 women) were enrolled from January 2000 to October 2015. Odds ratios (ORs) with 95% confidence intervals (CIs) were estimated, and a multivariate analysis was conducted.After adjusting for age, alcohol consumption, smoking status, family history of gastric cancer or esophageal cancer, and serum total cholesterol level, a BMI ranging from 27.5 to 29.9 was significantly related to an increased risk of gastric high-grade dysplasia in both men (adjusted OR=1.87, 95% CI=1.24-2.81) and women (adjusted OR=2.72, 95% CI=1.44-5.16). The 2 highest BMI categories (27.5-29.9 and 30.0) were identified as risk factors for gastric cardia high-grade dysplasia in both men (BMI=27.5-29.9: adjusted OR=1.78, 95% CI=1.02-3.10; BMI 30.0: adjusted OR=2.54, 95% CI=1.27-5.08) and women (BMI=27.5-29.9: adjusted OR=2.88, 95% CI=1.27-6.55; BMI 30.0: adjusted OR=2.77, 95% CI=1.36-5.64), whereas only a BMI ranging from 27.5 to 29.9 was a risk factor for gastric noncardia high-grade dysplasia in both men (adjusted OR=1.98, 95% CI=1.25-3.14) and women (adjusted OR=2.88, 95% CI=1.43-5.81). In addition, higher serum total cholesterol was associated with an increased risk of gastric noncardia high-grade dysplasia (adjusted OR=1.83, 95% CI=1.25-2.69) in women.Increased BMI was associated with an increased risk of gastric high-grade dysplasia in both men and women, and higher serum total cholesterol increased the risk of gastric noncardia high-grade dysplasia in women.