Table 3. ORs of gastric cancer by the potentially protective foods intakes.
| Variables | No. of cases/controls | Model I1) | Model II2) | |||
|---|---|---|---|---|---|---|
| OR | (95% CI) | OR | (95% CI) | |||
| Soy products (g/day) | ||||||
| Tertile 1 | 40/27 | 1.00 | Ref. | 1.00 | Ref. | |
| Tertile 2 | 22/28 | 0.39 | (0.16–0.93) | 0.38 | (0.15–0.92) | |
| Tertile 3 | 20/27 | 0.39 | (0.16–0.94) | 0.37 | (0.14–0.96) | |
| P for trend | 0.127 | 0.131 | ||||
| Fruits (g/day) | ||||||
| Tertile 1 | 44/27 | 1.00 | Ref. | 1.00 | Ref. | |
| Tertile 2 | 18/28 | 0.49 | (0.21–1.17) | 0.38 | (0.15–0.95) | |
| Tertile 3 | 20/27 | 0.44 | (0.18–1.09) | 0.35 | (0.13–0.94) | |
| P for trend | 0.108 | 0.080 | ||||
| Vegetables (g/day) | ||||||
| Tertile 1 | 33/27 | 1.00 | Ref. | 1.00 | Ref. | |
| Tertile 2 | 19/28 | 0.54 | (0.22–1.31) | 0.74 | (0.29–1.90) | |
| Tertile 3 | 30/27 | 1.06 | (0.43–2.62) | 1.58 | (0.58–4.34) | |
| P for trend | 0.877 | 0.541 | ||||
| Dairy products (g/day) | ||||||
| Tertile 1 | 40/27 | 1.00 | Ref. | 1.00 | Ref. | |
| Tertile 2 | 20/28 | 0.46 | (0.19–1.12) | 0.47 | (0.19–1.17) | |
| Tertile 3 | 22/27 | 0.48 | (0.20–1.14) | 0.51 | (0.20–1.30) | |
| P for trend | 0.193 | 0.281 | ||||
OR, odds ratios; CI, confidence interval.
1)Model I: adjusted for age, sex body mass index (≤ 22.99, 23.0–24.99, ≥ 25, or missing), education level (≤ middle school, ≥ high school, or missing), family history of gastric cancer (no or yes), smoking status (never, past, or current smokers), alcohol consumption (never, past, < 20 g/day for women or < 40 g/day for men, or ≥ 20 g/day for women or ≥ 40 g/day for men), hospital (Chungnam University Hospital or Hanyang University Guri Hospital), and total energy intake (continuous).
2)Model II: model I + further adjusted for log intakes of each other food groups.