Table 5. ORs of gastric cancer by the intake score of potentially protective food groups.

Variables		No. of cases/controls	OR	(95% CI)*
Intake score of protective food groups†
	0: Low intake for all food groups	17/10	1.00	Ref.
	1: High intake for 1 food group	20/21	0.41	(0.13–1.24)
	2: High intake for 2 food groups	23/17	0.67	(0.21–2.10)
	3: High intake for 3 food groups	18/24	0.34	(0.11–1.09)
	4: High intake for 4 food groups	4/10	0.15	(0.03–0.85)

OR, odds ratios; CI, confidence interval.

^*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).

^†In each food group of soy products, fruits, vegetables, and dairy products, 1 point was given for intakes of above the median value, and 0 point was given for intakes of below the median value, and the sum of each food group was calculated.