Table 2.

Stage of cancer diagnosis for cancers diagnosed after an abnormal mammogram at San Francisco mammography facilities 2005‐2012 by facility short and long follow‐up group (N = 3099 Women)

	Short follow‐up facility group (four facilities/2495 patients) N (%)	Long follow‐up facility group (four facilities/604 patients) N (%)
Cancer stage
0	705 (28.3)	146 (24.2)
I	974 (39.0)	204 (33.8)
IIa	421 (16.9)	116 (19.2)
IIb	175 (7.0)	55 (9.1)
III(a,b,c)	150 (6.0)	50 (8.3)
IV	34 (1.4)	16 (2.6)
Missing	36 (1.4)	17 (2.8)