Table 3.
Baseline characteristics of patients undergoing primary THA for categorical variables
| Geneva registry Switzerland (N = 1,023) | FORCE-TJR United States (N = 4,647) | Risk difference (95% CI) | P-value**** | |
|---|---|---|---|---|
| Women (N, %) | 590 (57.7) | 2,660 (57.2) | 0.5 (-2.9; 3.8) | 0.788 |
| Age in categories (N, %) | 0.000 | |||
| <60 years of age | 231 (22.6) | 1,435 (31.0) | -8.4 (-11.8; -5.1) | |
| 60 to 79.9 years of age | 599 (58.6) | 2,813 (60.8) | -2.2 (-7.4; 3.0) | |
| ≥80 years of age | 193 (18.9) | 380 (8.2) | 10.7 (7.9; 13.4) | |
| Preoperative BMI categories (N, %)* | 0.000 | |||
| <25 | 381 (37.5) | 1,104 (24.3) | 13.1 (9.1; 17.1) | |
| 25–29.9 | 397 (39.0) | 1,692 (37.3) | 1.7 (-2.5; 6.0) | |
| 30–34.9 | 173 (17.0) | 1,056 (23.3) | -6.3 (-9.2; -3.4) | |
| ≥35 | 66 (6.5) | 683 (15.1) | -8.6 (-10.5; -6.6) | |
| Education (N, %)** | 0.000 | |||
| <= 8 years | 126 (38.3) | 36 (0.8) | 37.5 (30.8; 44.2) | |
| 9–12 years (high school) | 104 (31.6) | 1134 (25.7) | 5.9 (-0.4; 12.1) | |
| > = 13 years (college) | 99 (30.1) | 3238 (73.5) | -43.4 (-49.8; -36.9) | |
| Co-morbidities (N, %) | ||||
| Diabetes | 98 (9.6) | 543 (11.7) | -2.1 (-4.2; 0.0) | 0.017 |
| Cardiac disease | 80 (7.8) | 330 (7.1) | 0.7 (-1.2; 2.6) | 0.610 |
| Stroke | 38 (3.7) | 116 (2.5) | 1.2 (0.0; 2.5) | 0.050 |
| Primary OA (N, %) | 834 (81.5) | 4,190 (90.2)*** | -8.7 (-11.2; -6.1) |