Table 4.
Change in mean latent postoperative EQ-VAS Health in primary conventional THA (primary diagnosis osteoarthritis)
| Term | Estimate (95% CI) | p value |
| Intercept | 60.27 (53.85 to 66.69) | < 0.001 |
| Age | 0.00 (-0.06 to 0.05) | 0.87 |
| Surgical approacha | ||
| Anterior | 0.52 (-0.93 to 1.96) | 0.48 |
| Lateral | -2.39 (-4.19 to -0.59) | 0.01 |
| ASA classificationb | ||
| ASA 1 | 6.21 (0.98 to 11.45) | 0.02 |
| ASA 2 | 3.08 (-1.81 to 7.97) | 0.21 |
| ASA 3 | 0.05 (-4.81 to 4.90) | 0.99 |
| BMI kg/m2c | ||
| Underweight < 18.5 or normal 18.5-24.9 | 5.94 (3.49 to 8.40) | < 0.001 |
| Preobese 25.0 to 29.9 | 5.08 (2.75 to 7.42) | < 0.001 |
| Obese Class 1 30.0 to 34.9 | 3.81 (1.47 to 6.15) | 0.001 |
| Obese Class 2 35.0 to 39.9 | 1.92 (-0.60 to 4.45) | 0.14 |
| Surgeon 2-year CPR | -0.30 (-0.83 to 0.23) | 0.27 |
| Sex | ||
| Male | -0.36 (-1.38 to 0.67) | 0.49 |
| Preoperative EQ-VAS Health | 0.24 (0.22 to 0.27) | < 0.001 |
| Variance components | ||
| Surgeon | 5.35 (2.91 to 9.85) | < 0.001 |
The total number of patients was 3965; residual variance estimate = 59.5.
a
The reference category for surgical approach is posterior approach.
b
The reference category for ASA is ASA 4 or 5.
c
The reference category for BMI is obese, Class 3 (≥ 40.0 kg/m2). ASA = American Society of Anesthesiologists; CPR = cumulative percent revision.