Fig. 7.

Stepwise multivariable linear regression models for associations clinical and turning characteristics of freezers. (a) As the NFOGQ score increases, the outer step length decrease; (b) as the UPDRS total score, (c) UPDRS part III score, (d) Hoehn and Yahr stage, and (e) PIGD score increase, the outer contralateral temporal coordination parameter increases for freezers when performing the 360° turning task. The tendencies of the regression lines indicate the positive or negative linear correlation of their corresponding correlation coefficients. Significant differences are indicated by p < 0.05; NFOGQ New freezing of gait questionnaire, UPDRS Unified Parkinson’s Disease Rating Scale, PIGD Postural instability/gait difficulty