Table 1.

Distribution of selected characteristics for women from the Shanghai Women's Health Study

CharacteristicsCases (n = 162)Controls (n = 299)P
Ever smoking, n (%)9 (5.6)13 (4.4)0.56
Ever alcohol use, n (%)3 (1.9)6 (2.0)0.91
BMI, kg/m2, n (%)
 <2588 (54.3)186 (62.2)
 ≥25 and <3064 (39.5)97 (32.4)
 ≥3010 (6.2)16 (5.4)0.26
Regular moderate or vigorous physical activity >3 MET h/d, n (%)20 (26.3)31 (24.2)0.74
Education, n (%)
 High school or more39 (24.1)94 (31.4)
 Less than High school123 (75.9)205 (68.6)0.10
Family history of gastric cancer, n (%)14 (8.6)19 (6.4)0.36
NSAID use, within past year, n (%)4 (2.5)7 (2.3)0.93
Regular multiple vitamin use, n (%)11 (6.8)22 (7.4)0.82
H. pylori positive,an (%)129 (96.3)226 (92.6)0.16
Age, y, median (IQR)61 (50–65)61 (50–65)0.80
Fruits/vegetables intake, g/d, median (IQR)452.5 (297.2–635.1)485.4 (348.6–697.7)0.12
 Fruits, g/d, median (IQR)211.5 (92.4–320.3)227.6 (120.4–352.4)0.17
 Vegetables, g/d, median (IQR)242.1 (156.0–372.4)250.0 (177.1–357.8)0.32
Meat intake, g/d, median (IQR)38.7 (21.7–59.4)37.3 (23.9–56.3)0.93
mtDNA copy number, median (IQR)1.04 (0.87–1.25)1.06 (0.88–1.29)0.51

NOTE: Continuous variables are displayed as medians (IQR) and frequencies are displayed as counts (percentage). Comparison of cases and controls conducted using the χ2 test for categorical variables and the Wilcoxon nonparametric test for continuous variables.

Abbreviation: MET, metabolic equivalent.

  • aAvailable on only 378 subjects.