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Correlation between PII and balance tests.
| PII | Speaman R | p-value |
|---|---|---|
| Pull-test | 0.70 | 0.000001 |
| BESTest | −0.53 | 0.000001 |
| TUG | 0.54 | 0.00001 |
Pull test, unified Parkinson disease rating scale– Section III; BESTest, balance evaluation systems test; TUG, timed up & go test; PII, postural instability index.
