. Author manuscript; available in PMC: 2021 Nov 1.

Published in final edited form as: J Am Coll Radiol. 2020 Aug 7;17(11):1420–1428. doi: 10.1016/j.jacr.2020.07.019

Table 2.

Change in the proportion of facilities meeting specific benchmarks for call back and cancer detection in the Chicago Breast Cancer Quality Consortium (2006-2013).

Number of time points available for analysis	Recall Rate			Biopsy recommendation Rate			Cancer∣Abnormal (PPV1)			Cancer∣Biopsied (PPV3)			Screen Detection Rate			Proportion Minimal			Proportion early stage

	N^a	%^b	P^c	N^a	%^b	P^d	N^a	%^b	P^c	N^a	%^b	P^c	N^a	%^b	P^c	N^a	%^b	P^c	N^a	%^b	P^c
2 time points									0.07						0.15
1	53	64		53	55		53	36		53	45		53	60		53	68		53	68
2	53	66		53	47		53	51		53	38		53	72		53	68		53	70
3 time points						0.06												0.01			0.06
1	20	50		20	40		20	55		20	45		20	60		20	60		20	60
2	20	45		20	40		20	60		20	60		20	65		20	80		20	95
3	20	55		20	70		20	55		20	45		20	75		20	90		20	85
4 time points															0.03			<0.001			<0.001
1	16	56		16	69		16	44		16	25		16	50		16	25		16	31
2	16	56		16	50		16	44		16	44		16	50		16	63		16	56
3	16	50		16	50		16	69		16	50		16	69		16	88		16	81
4	16	56		16	63		16	31		16	38		16	75		16	88		16	94
5 time points									0.03			0.02						<0.001			<0.001
1	25	56		25	60		25	40		25	52		25	72		25	24		25	16
2	25	84		25	72		25	88		25	64		25	84		25	64		25	52
3	25	76		25	64		25	56		25	76		25	64		25	96		25	96
4	25	76		25	64		25	80		25	80		25	88		25	96		25	100
5	25	68		25	72		25	72		25	72		25	84		25	92		25	92
Combined						0.17			0.005			0.007			0.004			<0.001			<0.001
1	114	59		114	55		114	41		114	44		114	61		114	51		114	50
2	114	65		114	52		114	60		114	48		114	70		114	68		114	68
3	61	62		61	62		61	59		61	59		61	69		61	92		61	89
4	41	68		41	63		41	61		41	63		41	83		41	93		41	98
5	25	68		25	72		25	72		25	72		25	84		25	92		25	92

Number of facilities with data at specified time points.

Percentage of facilities meeting the benchmark at each time point.

P-values from a Wald test for trend via logistic regression with generalized estimating equations to account for clustering by facility. All P-values >0.20 are suppressed. Abbreviations: PPV1, positive predictive value 1; PPV3 positive predictive value 3.