Table 3. The relative frequency and OR (95% CI) of breast cancer risk in association with Allium vegetables between controls and cases (total-population^*).

Variable	Case (n = 285) No. (%)	Control (n = 297) No. (%)	p-value†	OR (95% CI)	Adjusted OR (95% CI)‡
Total onion (g/day)			< 0.001
< 4.0	68 (23.9)	99 (33.3)		1.00	1.00
4.0–53.5	78 (27.4)	98 (33.0)		1.20 (0.70–1.90)	1.18 (0.73–1.91)
> 53.5	139 (48.8)	100 (33.7)		2.02 (1.35–3.02)§	0.85 (0.53–1.36)
p for trend				0.875	0.689
Raw onion (g/day)			0.437
< 1.0	112 (39.3)	104 (35.0)		1.00	1.00
1.0–7.1	76 (26.7)	92 (31.0)		0.80 (0.5–1.10)	0.67 (0.41–1.09)
> 7.1	97 (34.0)	101 (34.0)		0.90 (0.6–1.30)	0.63 (0.40–1.00)
p for trend				0.080	0.075
Cooked onion (g/day)			< 0.001
< 1.0	95 (33.3)	150 (50.5)		1.00	1.00
1.0–42.8	43 (15.1)	45 (15.2)		1.50 (0.90–2.50)	2.17 (1.25–3.77)§
> 42.8	147 (51.6)	102 (34.3)		2.20 (1.60–3.30)§	1.33 (0.86–2.06)
p for trend				0.078	1.222
Garlic (g/day)			0.003
< 0.34	79 (27.7)	122 (41.0)		1.00	1.00
0.34–1.0	101 (35.4)	86 (29.0)		1.80 (1.20–2.70)§	1.71 (1.00–2.90)
> 1.0	105 (36.9)	89 (30.0)		1.80 (1.20–3.20)§	1.25 (0.81–1.92)
p for trend				0.087	1.101
Leek (g/day)			0.026
< 0.66	104 (36.5)	81 (27.3)		1.00	1.00
0.66–2.85	87 (30.5)	90 (30.3)		0.70 (0.50–1.10)	0.68 (0.43–1.08)
> 2.85	94 (33.0)	126 (42.4)		0.60 (0.40–0.90)§	0.33 (0.20–0.54)§
p for trend				< 0.001	< 0.001

OR=odds ratio; CI=confidence interval.

^*Total population is a term referred to both consumers and nonconsumers;^†Chi-square test was performed; ^‡Adjusted for confounders included age (≤48, >48 yr), menopause (yes or no), total calorie (≤2,148, >2,148 kcal/day), dietary fat (≤104, >104 g/day), dietary fiber (≤17, >17 g/day), and body mass index (≤24.9, 25-29.9, and >30 kg/m²); ^§Statistically significant (p<0.05).