The Role of Muscle Strength in the Sit-to-Stand Task in Parkinson’s Disease

Table 2

Multivariate analysis to assess the effect of muscle strength and Parkinsonian variables on the sit-to-stand task.

Variables in the final equation	Exp B coefficient	Exp B 95% C.I.	value
Model 1
Gait	10.394	3.268–33.05	<0.001
Strength ≤9 kg	4.616	1.021–20.881	0.047
Model 2
Bradykinesia	2.646	1.353–5.174	0.004
Strength ≤9 kg	3.602	1.126–11.517	0.031

Model 1: constant: B-7.630, Exp B: 0.001, . Hosmer–Lemeshow: (P = 0.993). Variables not included in the final equation: leg rigidity, leg bradykinesia, freezing, and postural instability. Model 2: constant: B-3.342, Exp B: 0.035, . Hosmer–Lemeshow: (P = 0.709). Variables not included in the final equation: leg tremor and leg rigidity. Cox and Snell R²: 0.173; Nagelkerke R²: 0.270. The same significant variables were obtained in model 2, when introducing sex, age, and time of evolution of Parkinson’s disease as independent variables into the regression model. Method: backward (Wald) for both models.