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Table 2 Pearson correlation coefficients of participant and therapist-rated outcomes

From: Lee Silverman Voice Treatment versus standard speech and language therapy versus control in Parkinson’s disease: a pilot randomised controlled trial (PD COMM pilot)

  Baseline 3 months
  VHI–total score PDQ-39 communication V-RQoL LwD VHI PDQ-39 communication V-RQoL LwD
Participant-rated         
VHI-total score 1.00 1.00
PDQ-39 communication 0.73 1.00 0.74 1.00
V-RQoL 0.86 0.76 1.00 0.90 0.77 1.00
LwD 0.77 0.73 0.78 1.00 0.78 0.75 0.79 1.00
Therapist-rated         
AIDS words −0.64 −0.45 −0.46 −0.33 −0.53 −0.30 −0.31 −0.38
AIDS sentences −0.65 −0.43 −0.45 −0.35 −0.58 −0.34 −0.36 −0.35
Rainbow passage 0.17 0.15 0.16 0.08 −0.11 0.02 −0.15 −0.12
Cookie theft −0.10 0.03 0.03 −0.14 −0.14 −0.02 −0.12 −0.18
Vocal loudness −0.09 −0.15 −0.06 −0.12 −0.16 −0.10 −0.12 −0.18
  1. VHI Voice Handicap Index, PDQ-39 Parkinson’s Disease Questionnaire-39, V-RQoL voice-related quality of life score, LwD Living with Dysarthria score