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Table 1 Results from regression analysis

From: Mapping the EQ-5D index by UPDRS and PDQ-8 in patients with Parkinson’s disease

  EQ-5D German index EQ-5D European index
  M1 M2 M3 M4 M1 M2 M3 M4
Intercept 0.904154*** 0.927487*** 0.962811*** 0.9298*** 79.272395*** 76.85026*** 80.05367*** 81.959757***
UPDRS II      −0.775300
* 1
   
UPDRS III −0.000129*** 2 −0.000111*** 2 −0.000106*** 2   −0.008005*** 2 −0.01006*** 2 −0.01022*** 2  
UPDRS IV   −0.013411** 1     −1.52015*** 1   
UPDRS IVa    0.003055** 2     0.24170* 2  
UPDRS IVb    −0.005198*** 2     −2.23550** 1 ,
UPDRS IVc    −0.044820*** 2     −3.91892*** 2  
PDQ1     −0.000043*** 2     −0.379520*** 1
PDQ2     −0.000023* 2     −0.002511*** 2
PDQ3         
PDQ4         
PDQ5         
PDQ6         
PDQ7         
PDQ8     −0.000035*** 2     −0.003005*** 2
R 2 0.5377 0.5685 0.7117 0.6034 0.5607 0.5850 0.6840 0.6662
RMS 0.1743 0.1691 0.1394 0.1628 15.7759 15.3327 13.3798 13.7519
Link test 0.068 n.s. 0.053 n.s. 0.33 n.s. 0.053 n.s 0.772 n.s. 0.025 n.s. 0.999 n.s. 0.025 n.s.
  1. Statistics for the regression analysis including the model fit of models achieving a maximum R2 and minimum root mean square error (RMS);
  2. * represent the level of significance (n.s.: not significant for p ≥0.05, *: p <0.05, **: p <0.01, ***: p <0.001); the numbers indicate the degree of terms included in the model for maximum R2 (1linear terms, 2quadratic terms); PDQx indicates the respective of the eight items of the PDQ-8 questionnaire.