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Inter-observer reliability testing for various knee positions
| Knee position | Pearson’s correlation coefficient | Mean difference between observers (degrees) |
|---|---|---|
| Active extension | 0.995 | 1.1 |
| Passive extension | 0.948 | 2.4 |
| Active flexion | 0.993 | 1.9 |
| Passive flexion | 0.993 | 1.8 |
