Table 3.

Association between HRR capacity and breast cancer risk in case–control study

	Controls, N (%)	Cases, N (%)	Unadj. OR (95% CI)	P value	Adj. OR (95% CI)a	P value
HRR capacity
Continuous (0.1% unit)	152 (100)	152 (100)	1.58 (1.32, 2.84)	<0.001	1.42 (1.21–2.53)	<0.001
By 75% in controls
≥12.71%	113 (74.34)	83 (34.85)	Reference		Reference
<12.71%	39 (25.66)	69 (65.15)	2.41 (1.44, 4.03)	<0.001	1.97 (1.18–3.34)	0.001
By tertile in the controls
High	50 (32.89)	32 (21.05)	Reference		Reference
Medium	51 (33.55)	51 (33.55)	1.56 (0.83, 2.94)	0.137	1.50 (0.79–3.08)	0.148
Low	51 (33.55)	69 (45.39)	2.11 (1.15, 3.91)	0.01	1.89 (1.07–4.23)	0.012
P for trend				<0.001		<0.001

^aAdjusted by age, race, BMI category, smoking status, alcohol status and physical activity.