Table 3.
Logistic Regression Model – Logistic GEE Shows O.R. for joint class in knee patients and joint in class patients, outcome is readmitted for PJI.
| OR | 95% CI | p value | |
|---|---|---|---|
| BMI Merged (Linear) | 1.085 | (1.045, 1.126) | <0.001 |
| Current Smoker | 10.383 | (2.800, 38.497) | <0.001 |
| Recent-Former Smoker | 15.653 | (5.834, 41.995) | <0.001 |
| A1c Diabetes with reasonable control | 0.620 | (0.448, 0.858) | 0.004 |
| A1c Diabetes not well controlled | 1.523 | (0.925, 2.507) | 0.098 |
| Hip - Total Joint Class (no attendance) | 3.427 | (2.383, 18.789) | <0.001 |
| Knee - Total Joint Class (attended) | 0.512 | (1.257, 3.033) | 0.003 |
| Hip - Total Joint Class (attendance) | 0.771 | (1.213, 1.866) | <0.001 |
Estimate of common correlation parameter is 0.0086.
Calculated dispersion parameter = 0.972.
CIC = 8.89. For the outcome variable, Y = 1 when Readmitted for PJI = 1.