TABLE 1. Baseline Characteristics of Study Population.
| Surgical Procedure | ||||
|---|---|---|---|---|
| Characteristics | THA (n = 691) |
Fracture Repair (n = 1,195) |
Total (n = 1,886) |
P Value* |
| Age, years | 74.9 (6.59) | 84.2 (7.49) | 80.8 (8.46) | <0.001 |
| Sex, male | 258 (37.3) | 234 (19.6) | 492 (26.1) | <0.001 |
| Race, White | 690 (100) | 1,187 (99.3) | 1,877 (99.5) | 0.17 |
| BMI† | 27.7 (5.36) | 23.3 (4.93) | 24.9 (5.52) | <0.001 |
| History | ||||
| Hypertension | 424 (61.4) | 695 (58.2) | 1,119 (59.3) | 0.17 |
| Diabetes | 57 (8.2) | 141 (11.8) | 198 (10.5) | 0.02 |
| Stroke | 50 (7.2) | 334 (27.9) | 384 (20.4) | <0.001 |
| CHF | 100 (14.5) | 321 (26.9) | 421 (22.3) | <0.001 |
| Atrial fibrillation | 72 (10.4) | 241 (20.2) | 313 (16.6) | <0.001 |
| Dementia | 16 (2.3) | 407 (34.1) | 423 (22.4) | <0.001 |
| ASA risk classification‡ | <0.001 | |||
| 1 or 2 | 343 (49.6) | 172 (14.4) | 515 (27.3) | |
| 3, 4, or 5 | 348 (50.4) | 1,022 (85.6) | 1,370 (72.7) | |
| Medication on admission | ||||
| Aspirin | 168 (24.3) | 369 (30.9) | 537 (28.5) | 0.002 |
| β-Blocker | 134 (19.4) | 184 (15.4) | 318 (16.9) | 0.03 |
| Insulin | 12 (1.7) | 48 (4) | 60 (3.2) | 0.007 |
| Length of stay, days | 7.3 (3.9) | 10.0 (7.61) | 9.0 (6.63) | <0.001 |
NOTE: Continuous variables are represented as mean (SD); categorical variables are represented as number and percentage.
Abbreviations: ASA, American Society of Anesthesiologists; BMI, body mass index; CHF, congestive heart failure; THA, total hip arthroplasty.
*
P values are from Kruskal-Wallis tests for continuous variables and from either χ2 or Fisher exact tests for categorical variables.
†
Fifteen cases had no BMI data.
‡
One case had no ASA risk classification data.