Table 1.
Demographics of patients in each BMI category
| Variable | BMI < 40 kg/m2 (n = 7506) | BMI ≥ 40 kg/m2 (n = 527) | p value |
| Male | 44% (3313) | 31% (164) | < 0.001 |
| Age in years | 70 (16-97) | 65 (16-86) | < 0.001 |
| Joint replaced | |||
| THA | 53% (3977) | 39% (207) | < 0.001 |
| TKA | 43% (3195) | 57% (299) | |
| UKA | 4.4% (334) | 4.0% (21) | |
| ASA Grade 1 and 2 | 86% (6434) | 67% (353) | < 0.001 |
| Operation performed by consultant | 81% (6050) | 81% (425) | 0.98 |
| VTE prophylaxis | |||
| Aspirin | 20% (1491) | 22% (114) | 0.49 |
| Enoxaparin | 80% (6008) | 78% (413) | |
| Mechanical only | 0.1% (7) | 0% (0) | |
| Cement status | |||
| Cementless | 63% (4750) | 74% (379) | < 0.001 |
| Cemented | 7.2% (538) | 6.1% (32) | |
| Hybrid | 29% (2172) | 22% (116) | |
| Reverse hybrid | 0.6% (46) | 0% (0) | |
| CTPA or ultrasound examination | 11% (842) | 13% (68) | 0.24 |
| Positive CTPA or ultrasound examination | 11% (90 of 842) | 7.4% (5 of 68) | 0.54 |
Data are presented as % (n) or median (range).