Table 3.
Multivariate Regression of the Effect of Patient Characteristics, Defect Morphology, and Self-Assessed Mental Health on Preoperative Knee-Specific Outcome Measures.
| Variable | Regression Coefficient | P |
|---|---|---|
| Age (in years) | ||
| KOOS Pain | −0.420 | 0.007* |
| KOOS Symptom | −0.076 | 0.618 |
| KOOS ADL | −0.387 | 0.03* |
| KOOS Sport/Recreation | −0.031 | 0.871 |
| KOOS QOL | −0.118 | 0.47 |
| Lysholm | −0.067 | 0.686 |
| Tegner | −0.047 | 0.02* |
| IKDC | −0.198 | 0.207 |
| Female sex | ||
| KOOS Pain | −5.048 | 0.073 |
| KOOS Symptom | −7.517 | 0.008* |
| KOOS ADL | −5.167 | 0.11 |
| KOOS Sport/Recreation | −5.212 | 0.14 |
| KOOS QOL | 0.340 | 0.909 |
| Lysholm | −6.647 | 0.028* |
| Tegner | −0.711 | 0.052 |
| IKDC | −5.066 | 0.077 |
| BMI (in kg/m2) | ||
| KOOS Pain | −0.683 | 0.047* |
| KOOS Symptom | −0.349 | 0.304 |
| KOOS ADL | −0.842 | 0.033* |
| KOOS Sport/Recreation | 0.114 | 0.79 |
| KOOS QOL | 0.794 | 0.03* |
| Lysholm | −0.359 | 0.328 |
| Tegner | −0.031 | 0.485 |
| IKDC | −0.096 | 0.782 |
| Smoking | ||
| KOOS Pain | −7.247 | 0.171 |
| KOOS Symptom | −3.521 | 0.502 |
| KOOS ADL | −17.003 | 0.006* |
| KOOS Sport/Recreation | −7.416 | 0.263 |
| KOOS QOL | −15.082 | 0.008* |
| Lysholm | −11.758 | 0.039* |
| Tegner | −0.0435 | 0.525 |
| IKDC | −14.787 | 0.006* |
| Worker’s Compensation | ||
| KOOS Pain | −10.313 | 0.058 |
| KOOS Symptom | −5.143 | 0.34 |
| KOOS ADL | −8.935 | 0.153 |
| KOOS Sport/Recreation | −12.698 | 0.063 |
| KOOS QOL | −8.781 | 0.128 |
| Lysholm | −12.783 | 0.029* |
| Tegner | −0.052 | 0.941 |
| IKDC | −9.144 | 0.098 |
| SF-12 MCS | ||
| KOOS Pain | 0.570 | < 0.001* |
| KOOS Symptom | 0.017 | 0.91 |
| KOOS ADL | 0.813 | < 0.001* |
| KOOS Sport/Recreation | 0.787 | < 0.001* |
| KOOS QOL | 0.842 | < 0.001* |
| Lysholm | 0.534 | 0.001* |
| Tegner | 0.047 | 0.017* |
| IKDC | 0.595 | < 0.001* |
| MPO | ||
| KOOS Pain | −4.926 | 0.077 |
| KOOS Symptom | −3.236 | 0.241 |
| KOOS ADL | −0.022 | 0.995 |
| KOOS Sport/Recreation | −5.698 | 0.102 |
| KOOS QOL | −6.015 | 0.042* |
| Lysholm | −5.228 | 0.08 |
| Tegner | 0.069 | 0.847 |
| IKDC | −5.477 | 0.053 |
| Concomitant surgery | ||
| KOOS Pain | 0.442 | 0.886 |
| KOOS Symptom | −0.124 | 0.968 |
| KOOS ADL | −2.980 | 0.401 |
| KOOS Sport/Recreation | −7.781 | 0.045* |
| KOOS QOL | −0.168 | 0.959 |
| Lysholm | −0.480 | 0.884 |
| Tegner | 0.239 | 0.55 |
| IKDC | −1.558 | 0.619 |
| Defect number | ||
| KOOS Pain | 3.857 | 0.059 |
| KOOS Symptom | 0.713 | 0.724 |
| KOOS ADL | 4.401 | 0.06 |
| KOOS Sport/Recreation | 2.545 | 0.318 |
| KOOS QOL | 1.434 | 0.506 |
| Lysholm | 1.403 | 0.52 |
| Tegner | −0.038 | 0.885 |
| IKDC | −0.736 | 0.721 |
| Defect size (in mm2) | ||
| KOOS Pain | −0.008 | 0.017* |
| KOOS Symptom | −0.002 | 0.487 |
| KOOS ADL | −0.007 | 0.08 |
| KOOS Sport/Recreation | −0.008 | 0.053 |
| KOOS QOL | −0.005 | 0.127 |
| Lysholm | −0.004 | 0.217 |
| Tegner | <0.001 | 0.801 |
| IKDC | −0.004 | 0.206 |
| Patella lesion | ||
| KOOS Pain | −3.266 | 0.314 |
| KOOS Symptom | −6.181 | 0.056 |
| KOOS ADL | −2.724 | 0.464 |
| KOOS Sport/Recreation | −4.097 | 0.313 |
| KOOS QOL | −1.050 | 0.76 |
| Lysholm | −4.324 | 0.214 |
| Tegner | 0.625 | 0.138 |
| IKDC | −3.237 | 0.325 |
ADL = activities of daily living; BMI = body mass index; IKDC = International Knee Documentation Committee; KOOS, Knee injury and Osteoarthritis Outcome Score; MPO = multiple previous operations; QOL = quality of life; SF-12 MCS = Short Form–12 mental component summary.
*
Significant association with P < 0.05.