Table 4:

Downstream resource use (in percentage) by quartiles of risk-adjusted troponin ordering

Parameter Median (IQR)	Q1 (N=658,087)	Q2 (N=725,483)	Q3 (N=885,379)	Q4 (N=930,375)	p-value*
Downstream utilization
Inpatient Admission	28.4 (20.5, 35.0)	36.4 (29.2, 43.1)	35.9 (30.4, 40.7)	36.8 (29.2, 42.9)	0.0021
Echocardiogram	4.71 (1.94, 7.45)	8.21 (5.73, 9.44)	8.92 (8.06, 10.09)	9.44 (7.86, 11.3)	<0.001
Stress Test	2.08 (1.28, 3.28)	2.68 (1.99, 3.53)	3.53 (2.91, 4.41)	3.35 (2.79, 4.61)	<0.001
Angiogram	0.27 (0.05, 0.87)	0.55 (0.14, 1.11)	1.03 (0.45, 1.46)	0.99 (0.23, 1.38)	0.0023
PCI	0.09 (0.02, 0.26)	0.17 (0.07, 0.47)	0.38 (0.05, 0.66)	0.24 (0.08, 0.55)	0.0367
CABG	0.03 (0.01, 0.13)	0.10 (0.02, 0.16)	0.08 (0.03, 0.15)	0.07 (0.01, 0.14)	0.3577
Falsification endpoints
KUB	2.02 (0.55, 4.11)	2.31 (0.82, 4.90)	2.66 (1.12, 4.34)	2.06 (0.85, 2.54)	0.8062
RUQ US	0.25 (0.10, 0.58)	0.30 (0.20, 0.65)	0.18 (0.03, 0.39)	0.32 (0.07, 0.48)	0.1393

Abbreviations: IQR – interquartile ratio; PCI – percutaneous coronary intervention; CABG – coronary artery bypass surgery; KUB – Kidney ureter bladder Xray; RUQ US=Right upper quadrant ultrasound