Table 1. Cardiac Testing by Cohort and Time From ED Visit (%)a.
| Cardiac Test | Within 2 d of ED Visit | Within 30 d of ED Visit | ||||
|---|---|---|---|---|---|---|
| Overall (n = 26 633) |
Weekday Patients (n = 571 988) |
Weekend Patients (n = 354 645) |
Overall (n = 926 633) |
Weekday Patients (n = 571 988) |
Weekend Patients (n = 354 645) |
|
| Noninvasive/angiographyb,c,d | 15.93 | 18.18 | 12.30 | 24.28 | 26.10 | 21.35 |
| Noninvasive testc,d | 14.59 | 16.64 | 11.29 | 22.20 | 23.88 | 19.48 |
| Exercise ECG | 2.13 | 2.41 | 1.68 | 4.02 | 4.26 | 3.63 |
| Stress echocardiography | 3.32 | 3.88 | 2.42 | 5.21 | 5.66 | 4.50 |
| Myocardial perfusion scanc | 9.41 | 10.63 | 7.44 | 13.58 | 14.61 | 11.92 |
| Coronary CT angiography | 0.39 | 0.45 | 0.30 | 0.50 | 0.56 | 0.41 |
| Coronary angiography | 1.79 | 2.10 | 1.30 | 3.45 | 3.67 | 3.08 |
Abbreviations: CT, computed tomographic; ECG, electrocardiogram; ED, emergency department.
a
Data are given as percentages.
b
Patients who received either a noninvasive test or coronary angiography.
c
Cohen d > 0.1 for standardized mean differences of cardiac testing within 2 days of ED visit between weekday and weekend patients.
d
Cohen d > 0.1 for standardized mean differences of cardiac testing within 30 days of ED visit between weekday and weekend patients.