Table 2.
Results of multivariable logistic regression for total hip arthroplasty
| Outcome; comparison | OR (95% CI) | p value |
|---|---|---|
| In-hospital fracture or dislocation | ||
| Overweight v. normal weight | 0.85 (0.52 to 1.42) | 0.53 |
| Obese I v. normal weight | 0.61 (0.34 to 1.10) | 0.10 |
| Obese II v. normal weight | 0.73 (0.37 to 1.46) | 0.38 |
| Obese III v. normal weight | 0.86 (0.40 to 1.85) | 0.70 |
| Postoperative medical events* | ||
| Overweight v. normal weight | 1.12 (0.69 to 1.82) | 0.64 |
| Obese I v. normal weight | 1.10 (0.66 to 1.85) | 0.70 |
| Obese II v. normal weight | 1.07 (0.57 to 2.01) | 0.84 |
| Obese III v. normal weight | 1.16 (0.54 to 2.48) | 0.70 |
| Required blood transfusion* | ||
| Overweight v. normal weight | 0.71 (0.60 to 0.83) | < 0.001 |
| Obese I v. normal weight | 0.48 (0.40 to 0.58) | < 0.001 |
| Obese II v. normal weight | 0.40 (0.31 to 0.51) | < 0.001 |
| Obese III v. normal weight | 0.38 (0.28 to 0.52) | < 0.001 |
| Readmission within 30 days* | ||
| Overweight v. normal weight | 0.88 (0.66 to 1.17) | 0.37 |
| Obese I v. normal weight | 1.07 (0.80 to 1.43) | 0.65 |
| Obese II v. normal weight | 1.64 (1.19 to 2.25) | 0.002 |
| Obese III v. normal weight | 1.59 (1.10 to 2.31) | 0.014 |
| Deep infection* | ||
| Overweight v. normal weight | 2.53 (1.05 to 6.12) | 0.039 |
| Obese I v. normal weight | 3.98 (1.66 to 9.54) | 0.002 |
| Obese II v. normal weight | 7.65 (3.15 to 18.58) | < 0.001 |
| Obese III v. normal weight | 8.51 (3.37 to 21.48) | < 0.001 |
| Discharge to acute care, subacute care or long-term care facility* | ||
| Overweight v. normal weight | 0.94 (0.78 to 1.12) | 0.48 |
| Obese I v. normal weight | 1.07 (0.88 to 1.30) | 0.48 |
| Obese II v. normal weight | 1.72 (1.37 to 2.16) | < 0.001 |
| Obese III v. normal weight | 3.16 (2.44 to 4.08) | < 0.001 |
CI = confidence interval; OR = odds ratio.
*
Adjusted for age, sex and presurgical risk factors using multiple logistic regression.