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Table 7 Convergence between baseline outcome measures (Pearson’s correlation coefficient)

From: Lee Silverman Voice Treatment versus standard speech and language therapy versus control in Parkinson’s disease: preliminary cost-consequence analysis of the PD COMM pilot randomised controlled trial

 

PDQ-39

EQ-5D-3L

ICECAP-O

VHI

VR-QoL

PDQ_ COMM

PDQ-39 Summary

1

     

EQ-5D-3L

 − 0.65

1

    

ICECAP-O

 − 0.24

0.20

1

   

VHI

0.61

 − 0.38

 − 0.19

1

  

VR-QoL

0.57

 − 0.39

 − 0.27

0.87

1

 

PDQ_COMM

0.73

 − 0.42

 − 0.31

0.73

0.76

1

  1. VHI ranges from 0 to 120 where low score is good; PDQ-39 summary index and communication domain score range from 0 to 100, where low score is good
  2. EQ-5D-3L ranges from − 0.59 to 1; ICECAP-O from 0 to 1, where high score is good