Table 2:

Association between three risk stratification criteria and interval cancers. The three risk stratification criteria included the BCSC top 2.5%, BI-RADS d (extremely dense), or BCSC 5-year cancer risk >4.00% (very high).

Primary Risk Stratification Criteria	Interval Cancers in High-risk Group	Interval Cancers in Low-risk Group	Odds Ratio	Confidence Interval	P-value
BCSC top 2.5% n=113/339 Avg age=57 Avg BCSC (SD)=3.9 (1.3)	40 (35%)	21 (9%)	6.62†	3.28 – 13.4	<0.001***
Alternative Risk Stratification Criteria ‡
BI-RADS d N=45/339 Avg age=51 Avg BCSC (SD)=2.6 (1.2)	18 (40%)	43 (15%)	3.89	1.98 – 7.67	<0.001***
BCSC very high, >4.00% n=46/339 Avg age=62 Avg BCSC (SD)=5.2 (1.1)	15 (30%)	46 (16%)	2.60	1.30 – 5.19	0.007*

^*= p < 0.05

^**= p < 0.01

^***= p < 0.001; Standard Deviation (SD)

^†= derived from conditional linear regression, unadjusted odds ratio 5.35

^‡= samples not age-matched