The univariate linear regression model showed no significant association between Apo-B levels and motor performance in PD patients (p > 0.05), while the multivariable linear regression models (models 1 and 2) showed that Apo-B levels were significantly associated with gait/postural instability subscores in males with PD (p < 0.05) (Table 5). The gene discussed is APOB; the disease is Parkinson disease.