3.

Univariate and multivariate analyses of GC and premalignant lesions associated factors

Characteristics	Univariate*				Multivariate
	OR	95% CI	P		OR	95% CI	P
Age (year)			<0.001				<0.001
41–50 vs. ≤40	1.4E6	NA			1.2E6	NA
51–60 vs. ≤40	5.3E6	NA			3.9E6	NA
>60 vs. ≤40	1.4E7	NA			9.7E6	NA
Gender			0.077				0.086
Female vs. male	0.42	(0.12, 1.09)			0.38	(0.11, 1.04)
Occupation			0.030
Peasant vs. worker	8.72	(1.35, 32.5)
Officer vs. worker	1.36	(0.31, 42.8)
Service vs. worker	3.45	(0.53, 12.7)
Retired vs. worker	4.20	(1.46, 1.09)
Others vs. worker	3.8E–6	NA
Labor intensity			0.006				0.018
Moderate vs. light	0.15	(0.02, 0.53)			0.19	(0.03, 0.69)
Heavy vs. light	0.79	(0.23, 2.10)			1.02	(0.29, 2.89)
Income (¥)			0.390
2,001–3,000 vs. ≤2,000	0.42	(0.14, 1.17)
3,001–4,000 vs. ≤2,000	0.51	(0.15, 1.47)
>4,000 vs. ≤2,000	0.62	(0.19, 1.80)
Smoking			0.147
Occasionally vs. Yes	0.66	(0.10, 2.33)
Refrained vs. Yes	0.36	(0.02, 1.79)
Never vs. Yes	0.38	(0.14, 0.89)
Tumor history			0.093
No vs. Yes	2.32	(0.88, 7.95)
Other disease history			0.302
No vs. Yes	2.00	(0.59, 12.45)
Tea consumption			0.014
No vs. Yes	0.33	(0.15, 0.79)
Eating postures			0.629
Sit vs. squat	1.1E6	NA
Stand vs. squat	1.00	NA