Table 2.
Significant Bivariate Pearson’s Correlation of Preoperative Patient Factors with Knee-Specific Outcome Scores.
| Variable | Correlation Coefficient | P |
|---|---|---|
| Age (in years) | ||
| KOOS Pain | −0.304 | <0.001 |
| KOOS ADL | −0.266 | <0.001 |
| Tegner | −0.288 | 0.002 |
| IKDC | −0.288 | 0.002 |
| Female sex | ||
| KOOS Symptom | −0.262 | <0.001 |
| Lysholm | −0.176 | 0.019 |
| IKDC | −0.158 | 0.036 |
| BMI (in kg/m2) | ||
| KOOS Pain | −0.280 | <0.001 |
| KOOS ADL | −0.290 | <0.001 |
| Lysholm | −0.172 | 0.022 |
| IKDC | −0.148 | 0.049 |
| Smoking | ||
| KOOS Pain | −0.182 | 0.015 |
| KOOS ADL | −0.279 | <0.001 |
| KOOS QOL | −0.229 | 0.002 |
| Lysholm | −0.193 | 0.01 |
| IKDC | −0.231 | 0.002 |
| Worker’s Compensation | ||
| KOOS Pain | −0.245 | 0.001 |
| KOOS ADL | −0.236 | 0.002 |
| KOOS Sport/Recreation | −0.185 | 0.014 |
| KOOS QOL | −0.166 | 0.027 |
| Lysholm | −0.222 | 0.003 |
| IKDC | −0.172 | 0.022 |
| SF-12 MCS | ||
| KOOS Pain | 0.38 | <0.001 |
| KOOS ADL | 0.422 | <0.001 |
| KOOS Sport/Recreation | 0.353 | <0.001 |
| KOOS QOL | 0.421 | <0.001 |
| Lysholm | 0.329 | <0.001 |
| Tegner | 0.21 | 0.005 |
| IKDC | 0.354 | <0.001 |
| MPO | ||
| KOOS Pain | −0.214 | 0.004 |
| KOOS Sport/Recreation | −0.204 | 0.006 |
| KOOS QOL | −0.216 | 0.004 |
| Lysholm | −0.209 | 0.005 |
| IKDC | −0.248 | 0.001 |
| Concomitant surgery | ||
| KOOS Sport/Recreation | −0.214 | 0.004 |
| Defect number | ||
| IKDC | −0.184 | 0.014 |
| Defect size (in mm2) | ||
| KOOS Pain | −0.169 | 0.024 |
| KOOS Sport/Recreation | −0.181 | 0.016 |
| IKDC | −0.184 | 0.014 |
| Patella lesion | ||
| KOOS Symptom | −0.218 | 0.003 |
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.