TABLE IV.

ODDS RATIOS FOR ENDOMETRIAL CANCER ACCORDING TO QUINTILE OF SELECTED VITAMINS, SHANGHAI ENDOMETRIAL CANCER STUDY, 1997–2003

	Nutrient intake (by quintile, amount per 1,000 kcal per day)					p for trend
	Q1 (low)	Q2	Q3	Q4	Q5 (high)
Retinol (μg)	1.0	0.7 (0.5–0.9)	0.7 (0.5–1.0)	0.7 (0.5–0.9)	0.6 (0.4–0.8)	0.02
β–Carotene (μg)	1.0	1.0 (0.7–1.3)	0.8 (0.6–1.1)	0.8 (0.6–1.1)	0.6 (0.4–0.8)	<0.01
Vitamin B1 (mg)	1.0	0.8 (0.6–1.1)	0.7 (0.6–1.0)	0.8 (0.6–1.0)	0.9 (0.6–1.2)	0.37
Vitamin B2 (mg)	1.0	0.9 (0.7–1.3)	0.8 (0.6–1.1)	0.7 (0.5–1.0)	1.0 (0.7–1.4)	0.55
Vitamin C (mg)	1.0	0.9 (0.6–1.2)	0.6 (0.4–0.9)	0.6 (0.4–0.9)	0.5 (0.3–0.7)	<0.01
Vitamin E (mg)	1.0	1.1 (0.8–1.4)	1.0 (0.7–1.3)	0.8 (0.6–1.1)	0.8 (0.6–1.1)	0.03

Adjusted for age, education, menopausal status, diagnosis of diabetes, alcohol consumption, BMI, physical activity, total animal food intake, total fruit and vegetable intake, and total energy intake. Quintile cut points were 50.3, 74.6, 100.6, 137.3 μg/1,000 kcal/d for retinol intake; 922, 1,359, 1,793, 2439 μg/1,000 kcal/d for β–carotene intake; 0.46, 0.50, 0.54, 0.59 mg/1,000 kcal/d for vitamin B1 intake; 0.39, 0.47, 0.54, 0.62 mg/1,000 kcal/d for vitamin B2 intake; 29.8, 41.6, 54.4, 72.7 mg/1,000 kcal/d for vitamin C intake, and 6.0, 7.4, 8.8, 10.4 mg/1,000 kcal/d for vitamin E intake.