Table 2.

Descriptive outcome summary

Variable	Pre-implementation cohort n = 237	Post-implementation cohort n = 880	p value
Unnecessary testing, n(%)
Echocardiogram	35 (15)	25 (3)	< 0.001
Exercise testing	4 (2)	12 (1)	0.76
Rhythm testing	18 (8)	32 (4)	0.009
Chest X-ray	8 (3)	2 (0)	< 0.001
No additional testing	130 (55)	580 (66)	0.002
Total number of unnecessary tests per patient per visit
Median (IQR)	0 (0, 0)	0 (0, 0)	< 0.001
Range	0, 4	0, 2
Total number of tests per patient per visit
Median (IQR)	1 (1, 2)	1 (1, 2)	0.015
Range	0, 7	0, 5
Cardiology testing within guidelines, n(%)	180 (76)	821 (93)	< 0.001
Major testing charge per patient per visit (dollars)
Median (IQR)	0 (0, 1378)	0 (0, 213)	0.004
Range	0, 2171	0, 2044

IQR interquartile range