Table 2.
Cause for revision THA stratified by BMI class
| Cause for revision | Total sample | Underweight | Normal weight | Overweight/ obese | Morbidly obese | P-value* |
|---|---|---|---|---|---|---|
| Aseptic Loosening | 13,923 (14.1%) | 26 (7.4%) | 11,992 (14.6%) | 1,189 (12.5%) | 716 (10.9%) | < 0.001 |
| Dislocation | 15,051 (15.3%) | 109 (31.1%) | 13,214 (16.1%) | 1,153 (12.1%) | 575 (8.8%) | < 0.001 |
| Mechanical Complication | 17,918 (18.2%) | 35 (10.0%) | 15,317 (18.6%) | 1,619 (17.0%) | 947 (14.4%) | < 0.001 |
| Periprosthetic/ Total Joint Fracture | 3,817 (3.9%) | 28 (8.0%) | 3,288 (4.0%) | 292 (3.1%) | 209 (3.2%) | < 0.001 |
| Osteolysis/ Polyethylene Wear | 5,270 (5.3%) | 11 (3.1%) | 4,568 (5.6%) | 473 (5.0%) | 218 (3.3%) | < 0.001 |
| Periprosthetic Joint Infection | 30,469 (30.9%) | 98 (27.9%) | 23,579 (28.7%) | 3,423 (36.0%) | 3,369 (51.3%) | < 0.001 |
| Arthrofibrosis | 49 (0.1%) | ** | 40 (0.1%) | ** | ** | 0.91 |
| Other Joint Complication | 12,221 (12.4%) | 44 (12.5%) | 10,290 (12.5%) | 1,357 (14.3%) | 530 (8.1%) | < 0.001 |
*The P-value refers to that of the overall univariate analysis, thus, a P-value of < 0.05 indicates that the variable investigated in that row statistically varies significantly by weight class
**Cells with values ≤ 10 and their corresponding rows are not reported in order to avoid deidentification of NIS data