Characteristics of patients who underwent total knee arthroplasty
| Characterisic | Patients; weight class | p value | ||||
|---|---|---|---|---|---|---|
| Normal weight n = 1331 | Overweight n = 4574 | Class I obese n = 4901 | Class II obese n = 3124 | Class III obese n = 2555 | ||
| Age, mean, yr | 70.3 | 69.2 | 67.6 | 65.7 | 62.7 | < 0.001* |
| Sex, no. (%) | ||||||
| Male | 408 (30.7) | 2043 (44.7) | 2123 (43.3) | 1112 (35.6) | 742 (29.0) | < 0.001† |
| Female | 923 (69.3) | 2531 (55.3) | 2778 (56.7) | 2012 (64.4) | 1813 (71.0) | |
| Presurgical risk factors, no. (%) | ||||||
| 0 | 345 (25.9) | 1308 (28.6) | 1374 (28.0) | 807 (25.8) | 581 (22.7) | < 0.001† |
| 1 | 402 (30.2) | 1376 (30.1) | 1398 (28.5) | 911 (29.2) | 669 (26.2) | |
| ≥ 2 | 584 (43.9) | 1890 (41.3) | 2130 (43.5) | 1407 (45.0) | 1305 (51.1) | |