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Table 1 Best Fit Multivariable Regression Models with UPDRS Summary Scores as Candidate Variables (Model 1) and UPDRS Component Sub-Scores as Candidate Variables (Model 2)

From: Health-Related Quality of Life in Parkinson disease: Correlation between Health Utilities Index III and Unified Parkinson's Disease Rating Scale (UPDRS) in U.S. male veterans

  Multivariable Model 1
r2 = 0.69, AIC = -21.4
Multivariable Model 2
R2 = 0.76, AIC = -33.1
Predictor Coefficient 95% CI P -value Coefficient 95% CI P -value
Intercept 0.25 --- --- 0.17 --- ---
UPDRS II -.015 -0.024 to -0.005 0.003 --- --- ---
Axial Subscore --- --- --- -0.030 -0.043 to -0.018 <0.001
Schwab and England Score 0.006 0.002 to 0.010 0.003 0.005 0.003 to 0.008 <0.001
Pharmacotherapy for Dementia -0.21 -0.37 to -0.04 0.02 --- --- ---
Duration of disease --- --- --- 0.016 0.004 to 0.027 0.007