Table 3.
Patient characteristics before and after PSM
| Before PSM | After PSM | |||||
|---|---|---|---|---|---|---|
| Early PCI | Delayed PCI | P Value | Early PCI | Delayed PCI | P Value | |
| Variables | n = 7705 | n = 3946 | n = 3708 | n = 3708 | ||
| Age, y, median (IQR) | 73 (64–80) | 73 (65–81) | 0.003 | 74 (65–81) | 73 (65–81) | 0.26 |
| Caucasian, % | 70.7 | 72.5 | <0.001 | 73.1 | 72.1 | 0.76 |
| Weekend admission, % | 17.0 | 34.9 | <0.001 | 30.6 | 30.9 | 0.76 |
| Female sex, % | 35.5 | 37.1 | 0.1 | 37.7 | 36.9 | 0.49 |
| Chronic pulmonary disease | 22.4 | 25.1 | 0.001 | 24.8 | 24.8 | 0.98 |
| Coagulopathy | 4.9 | 5.3 | 0.26 | 5.4 | 5.3 | 0.84 |
| Depression | 8.7 | 8.8 | 0.79 | 8.9 | 9.0 | 0.87 |
| HTN | 88.6 | 88.2 | 0.52 | 87.9 | 88.3 | 0.64 |
| Fluid and electrolyte disorders | 20.9 | 28.6 | <0.001 | 26.8 | 27.8 | 0.36 |
| Acute CVA | 0.8 | 0.9 | 0.65 | 1.0 | 0.9 | 0.81 |
| Obesity | 20.5 | 20.8 | 0.68 | 21.0 | 20.9 | 0.93 |
| PVD | 20.9 | 22.3 | 0.08 | 21.7 | 22.0 | 0.76 |
| DM | 57.0 | 59.9 | 0.003 | 59.1 | 59.5 | 0.74 |
| Prior MI | 19.5 | 19.4 | 0.9 | 18.2 | 19.3 | 0.25 |
| Smoking | 34.0 | 33.2 | 0.39 | 34.1 | 33.3 | 0.46 |
| Dyslipidemia | 76.8 | 73.4 | <0.001 | 72.9 | 74.1 | 0.23 |
| Prior revascularization | 33.8 | 34.1 | 0.76 | 33.3 | 33.8 | 0.59 |
| Chronic ASA use | 19.8 | 19.5 | 0.68 | 19.9 | 19.6 | 0.75 |
| Family history of CAD | 8.1 | 7.6 | 0.39 | 7.6 | 7.6 | 1.00 |
| Ventricular arrhythmia | 4.7 | 5.0 | 0.54 | 5.1 | 4.8 | 0.56 |
| Cardiogenic shock | 3.3 | 2.1 | <0.001 | 2.2 | 2.1 | 0.81 |
| AKI | 31.8 | 39.9 | <0.001 | 39.3 | 38.6 | 0.52 |
| Year | ||||||
| 2010 | 14.2 | 13.5 | 0.34 | 13.5 | 13.3 | 0.84 |
| 2011 | 19.1 | 18.4 | 18.9 | 18.6 | ||
| 2012 | 20.6 | 21.3 | 20.7 | 21.5 | ||
| 2013 | 22.6 | 23.6 | 22.7 | 23.5 | ||
| 2014 | 23.5 | 23.2 | 24.2 | 23.1 | ||
Abbreviations: AKI, acute kidney injury; ASA, acetylsalicylic acid (aspirin); CAD, coronary artery disease; CVA, cerebrovascular accident; DM, diabetes mellitus; HTN, hypertension; IQR, interquartile range; MI, myocardial infarction; PCI, percutaneous coronary intervention; PSM, propensity score matching; PVD, peripheral vascular disease.