Table 4.
Significant predictors of time to initial evaluation, time to surgery, and postoperative outcomes
| Outcome | Significant predictorsa | β or OR with 95% CI | p-valueb |
|---|---|---|---|
| Time to initial evaluation | Subluxations occurring at least once a week | β = 57.1 [3.9 to 110.2] | 0.04 |
| Had general health check-up in year prior to surgery | β = − 100.5 [− 174.5 to − 26.5] | 0.008 | |
| Time to surgery | Subluxations occurring at least once a week prior to surgery | β = 58.3 [7.1 to 109.5] | 0.03 |
| Home ownership | β = − 56.5 [− 104.7 to − 8.3] | 0.02 | |
| Reoperation | Age | OR = 1.1 [1.0 to 1.2] | 0.02 |
| At least one dislocation episode prior to surgery | OR = 10.3 [1.4 to 76.7] | 0.02 | |
| Postoperative recurrent instability | Subluxations occurring at least once a week prior to surgery | OR = 8.7 [1.4 to 53.5] | 0.02 |
| Home ownership | OR = 0.1 [0.0 to 0.6] | 0.01 | |
| Employed full-time | OR = 0.1 [0.0 to 0.8] | 0.03 | |
| Return to sport | No significant predictors | n/a | n/a |
| Return to work | No significant predictors | n/a | n/a |
| VAS pain | Concomitant procedure(s) | β = 9.0 [0.2 to 17.8] | 0.045 |
| VAS sports | No significant predictors | n/a | n/a |
| VAS satisfaction | Employed full-time | β = 14.1 [4.3 to 23.9] | 0.006 |
| Non-white race AND at least 2 years of college education | β = − 18.3 [− 35.1 to − 1.6] | 0.03 | |
| Non-white race AND home ownership | β = 42.6 [23.6 to 52.6] | < 0.001 | |
| Non-white race AND took at least one vacation | β = − 23.4 [− 42.2 to − 4.6] | 0.02 | |
| Kujala score | Age | β = − 0.6 [− 1.0 to − 0.4] | 0.004 |
| Employed full-time | β = 8.7 [0.9 to 16.5] | 0.03 | |
| MPFL-RSI score | No significant predictors | n/a | n/a |
| MPFL-RSI > 56 | No significant predictors | n/a | n/a |
aAll predictors are adjusted for age at the time of surgery
bAll p-values are < 0.05
TT-TG tibial tubercle-to-trochlear groove, TTO tibial tubercle osteotomy, VAS Visual Analog Scale, MPFL-RSI Medial Patellofemoral Ligament-Return to Sport After Injury