Table 1.
Description of Study Population in Terms of Matching Variables and Demographics
| Stented | Non-Stented | |||||
|---|---|---|---|---|---|---|
| N | (%) | N | (%) | p-value | ||
|
| ||||||
| OVERALL | 9391 | (33.3) | 18782 | (66.7) | ||
| Demographics | ||||||
| Age | Median (IQR) | 65 | (59–73) | 65 | (59–73) | 0.87 |
| Comorbidities | ||||||
| History of CAD | Yes | 9391 | (100.0) | 18782 | (100.0) | 1.00 |
| No | 0 | (0.0) | 0 | (0.0) | ||
| History of CHF | Yes | 2089 | (22.2) | 4178 | (22.2) | 1.00 |
| No | 7302 | (77.8) | 14604 | (77.8) | ||
| History of Stroke | Yes | 448 | (4.8) | 896 | (4.8) | 1.00 |
| No | 8943 | (95.2) | 17886 | (95.2) | ||
| Insulin-Dependent | Yes | 1432 | (15.3) | 2864 | (15.3) | 1.00 |
| No | 7959 | (84.8) | 15918 | (84.8) | ||
| Creatinine >2 mg/dl | Yes | 511 | (5.4) | 1022 | (5.4) | 1.00 |
| No | 8880 | (94.6) | 17760 | (94.6) | ||
| Surgical Characteristics | ||||||
| High Risk Surgery* | Yes | 2151 | (22.9) | 4302 | (22.9) | 1.00 |
| No | 7240 | (77.1) | 14480 | (77.1) | ||
| Work Relative Value Unit | Median (IQR) | 15.13 | (8.9–21.0) | 16.13 | (8.8–21.0) | 0.97 |
| Surgery Type** | Digestive | 2608 | (27.8) | 5268 | (28.1) | 0.98 |
| Eye/Ear | 6 | (0.1) | 10 | (0.1) | ||
| Genital/Urinary | 1264 | (13.5) | 2515 | (13.4) | ||
| Integumentary | 167 | (1.8) | 322 | (1.7) | ||
| Musculoskeletal | 2078 | (22.1) | 4196 | (22.3) | ||
| Nervous | 333 | (3.6) | 658 | (3.5) | ||
| Other | 235 | (2.5) | 429 | (2.3) | ||
| Respiratory | 297 | (3.2) | 606 | (3.2) | ||
| Vascular | 2403 | (25.6) | 4778 | (25.4) | ||
| Stent Characteristics | ||||||
| Stent Type | BMS | 4929 | (52.5) | |||
| DES | 4350 | (46.3) | ||||
| Both | 112 | (1.2) | ||||
| Stent Indication | ACS / MI | 2803 | (29.9) | |||
| ACS / Non-MI | 3058 | (32.6) | ||||
| Non-ACS | 3530 | (37.6) | ||||
| Days to Surgery | Median (IQR) | 332 | (150–518) | |||
*
High risk surgery includes vascular suprainguinal procedures, intrathoracic, or intraperitoneal operations.
**
Controls were also matched by fiscal year of surgery
CAD=Coronary Artery Disease; CHF=Congestive Heart Failure; BMS=Bare Metal Stent; DES=Drug-Eluting Stent; IQR=Interquartile Range