Table 3.

Associations (OR (95%CI)) between tertiles of food groups (servings per day) during the 2nd trimester of pregnancy and unilateral retinoblastoma

	Food group tertiles (servings per day)	Conditional Logistic Model							Unconditional Logistic Modela
		Case N	n=92 matched setsb			n=85 matched setsc			Case N	Cases: n=183, Controls: n=144			Cases: n=163, Controls: n=136
			Crude OR	95% C.I.		Adj ORd	95% C.I.			Crude OR	95% C.I.		Adj ORd	95% C.I.
Fruit
	0 – 1.37	33	ref	~	~	ref	~	~	75	ref	~	~	ref	~	~
	>1.37 – 2.43	38	1.17	0.60	2.26	0.86	0.38	1.94	65	0.87	0.51	1.47	0.84	0.46	1.54
	>2.43 – 8	21	0.70	0.34	1.46	0.38	0.14	1.02	43	0.60	0.35	1.05	0.56	0.28	1.12
Citrus
	0 – 0.16	27	ref	~	~	ref	~	~	65	ref	~	~	ref	~	~
	>0.16 – 0.86	44	2.17	1.04	4.51	2.23	0.94	5.29	79	1.30	0.78	2.18	1.34	0.75	2.39
	>0.86 – 3.5	21	1.58	0.70	3.56	1.98	0.72	5.44	39	0.78	0.44	1.39	0.76	0.39	1.50
Dairy
	0 – 1.57	31	ref	~	~	ref	~	~	73	ref	~	~	ref	~	~
	>1.57 – 2.73	34	1.06	0.52	2.15	0.61	0.25	1.52	57	0.83	0.49	1.42	0.79	0.43	1.48
	>2.73 – 6.51	27	0.83	0.39	1.76	0.36	0.12	1.09	53	0.78	0.46	1.35	0.62	0.30	1.27
Vegetables
	0.44 – 1.66	20	ref	~	~	ref	~	~	56	ref	~	~	ref	~	~
	>1.66 – 2.66	41	2.03	0.96	4.27	2.39	0.93	6.19	72	1.26	0.74	2.16	1.68	0.90	3.15
	>2.66 – 6.94	30	1.46	0.70	3.03	1.04	0.39	2.74	54	0.97	0.56	1.69	1.07	0.54	2.12
Poultry
	0 – 0.16	26	ref	~	~	ref	~	~	59	ref	~	~	ref	~	~
	>0.16 – 0.43	32	0.91	0.42	1.93	0.92	0.36	2.38	57	0.72	0.42	1.22	0.82	0.44	1.53
	>0.43 – 1.08	34	1.90	0.88	4.10	2.33	0.82	6.63	67	1.62	0.91	2.87	1.71	0.86	3.40
Red meat
	0 – 0.30	37	ref	~	~	ref	~	~	75	ref	~	~	ref	~	~
	>0.30 – 0.65	31	0.58	0.27	1.23	0.53	0.22	1.30	62	0.80	0.48	1.34	0.80	0.45	1.43
	>0.65 – 2.22	24	0.44	0.19	1.03	0.35	0.11	1.13	46	0.78	0.45	1.37	0.68	0.35	1.33
Cured meat
	0 – 0.08	31	ref	~	~	ref	~	~	65	ref	~	~	ref	~	~
	>0.08 – 0.16	24	1.77	0.77	4.07	2.90	0.99	8.55	42	1.27	0.71	2.29	1.41	0.75	2.67
	>0.16 – 1.31	37	2.83	1.24	6.44	5.07	1.63	15.70	76	1.64	0.99	2.73	1.53	0.85	2.77
Seafood
	0 – 0	30	ref	~	~	ref	~	~	58	ref	~	~	ref	~	~
	>0 – 0.14	27	1.48	0.71	3.09	1.44	0.60	3.45	50	1.21	0.69	2.13	1.45	0.78	2.71
	>0.14 – 2.22	35	1.46	0.71	2.99	2.20	0.92	5.26	75	1.65	0.97	2.79	2.03	1.12	3.69
Grains
	0.14 – 1.65	33	ref	~	~	ref	~	~	66	ref	~	~	ref	~	~
	>1.65 – 2.37	28	0.84	0.43	1.64	0.59	0.25	1.38	59	0.76	0.44	1.31	0.75	0.40	1.43
	>2.37 – 6	31	0.92	0.46	1.83	0.59	0.21	1.61	58	0.88	0.51	1.51	0.79	0.38	1.67
Sweets
	0 – 0.88	28	ref	~	~	ref	~	~	52	ref	~	~	ref	~	~
	>0.88 – 1.75	35	1.39	0.68	2.83	1.78	0.75	4.23	67	1.31	0.76	2.26	1.50	0.81	2.78
	>1.75 – 4.58	29	1.31	0.64	2.72	2.21	0.81	6.06	64	1.25	0.72	2.16	1.24	0.61	2.49
Fried foods
	0 – 0.08	23	ref	~	~	ref	~	~	48	ref	~	~	ref	~	~
	>0.08 – 0.24	29	2.86	1.28	6.39	6.34	2.14	18.83	49	1.66	0.93	2.97	1.81	0.95	3.44
	>0.24 – 1.51	40	2.65	1.21	5.82	4.89	1.72	13.89	86	2.41	1.42	4.11	2.01	1.08	3.76

^aAdjusted for matching variable age group

^bUnilateral retinoblastoma cases and cancer-free controls were matched on age group at time of interview (0–1, 2–3, 4–5, 6–7, 8–9, 10–11,12–13 and 14–15 years).

^cSeven matched sets were dropped due to missing values for one of the adjustment variables.

^dAdjusted for mother’s race and education, mother smoked month before or during pregnancy, household income, prenatal vitamin use, and total calories per day.