Table 5.

Relative risks (RRs) and 95% confidence intervals for the association between flavonoid-rich foods and epithelial ovarian cancer among 1,141 cases and 1,183 controls

Food	Servings	Cases	Controls	Multivariable RRa,b
Tea, non-herbal	<=1/week	697	723	1.00 (ref.)
	2–6/week	182	197	0.94 (0.74, 1.20)
	1/day	133	140	0.95 (0.72, 1.25)
	2+/day	129	123	1.13 (0.85, 1.50)
				p -trend = 0.53
Red wine	<1/month	746	738	1.00 (ref.)
	1–3/month	186	198	1.01 (0.80, 1.29)
	1/week	77	89	1.03 (0.73, 1.45)
	2–4/week	81	94	0.96 (0.69, 1.35)
	5+/week	51	64	0.83 (0.55, 1.25)
				p -trend = 0.18
Kale	<1/month	1,020	1,049	1.00 (ref.)
	1–3/month	83	87	0.96 (0.67, 1.37)
	1/week	27	28	0.99 (0.54, 1.79)
	2+/week	11	19	0.66 (0.30, 1.48)
				p -trend = 0.46
Broccoli	<1/month	154	129	1.00 (ref.)
	1–3/month	301	313	0.88 (0.65, 1.19)
	1/week	374	390	1.02 (0.75, 1.39)
	2+/week	312	351	1.05 (0.76, 1.46)
				p -trend = 0.93
Celery	<1/month	382	328	1.00 (ref.)
	1–3/month	358	366	0.91 (0.73, 1.14)
	1/week	196	238	0.81 (0.62, 1.06)
	2–4/week	144	189	0.67 (0.50, 0.90)
	5+/week	61	62	0.92 (0.60, 1.39)
				p -trend = 0.11
Blueberries	<1/month	622	579	1.00 (ref.)
	1–3/month	314	372	0.86 (0.70, 1.06)
	1/week	119	158	0.77 (0.58, 1.02)
	2+/week	86	74	1.13 (0.78, 1.64)
				p -trend = 0.41
Raisins	<1/month	481	462	1.00 (ref.)
	1–3/month	370	404	0.93 (0.76, 1.15)
	1/week	148	147	1.06 (0.80, 1.41)
	2–4/week	97	121	0.83 (0.60, 1.15)
	5+/week	45	49	0.86 (0.54, 1.37)
				p -trend = 0.03
Cauliflower	<1/month	593	571	1.00 (ref.)
	1–3/month	345	387	0.88 (0.72, 1.08)
	1/week	150	154	0.93 (0.70, 1.23)
	2+/week	53	71	0.68 (0.45, 1.02)
				p -trend = 0.05

^aP -values are for the test for trend for continuous intake in servings/day; calculated using the Wald test

^bAdjusted for age in years, study center, duration of oral contraceptive use, parity, history of tubal ligation, physical activity, total duration of breastfeeding, dietary intake of carotenoids, fiber intake, and total energy intake