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Table 4 Item-to-dimension correlations

From: Evaluation of PDQ-8 and its relationship with PDQ-39 in China: a three-year longitudinal study

PDQ-39 dimension PDQ-8 item Item to own-dimension correlationa Item to other dimensions correlationa
Mobility Q7 0.80 0.30–0.43
Activity of daily living Q12 0.71 0.23–0.50
Emotional well-being Q17 0.87 0.33–0.53
Stigma Q25 0.85 0.24–0.49
Social support Q27 0.83 0.26–0.46
Cognitions Q31 0.72 0.21–0.44
Communication Q35 0.85 0.40–0.60
Bodily discomfort Q37 0.84 0.24–0.39
  1. aSpearman’s rank correlation
  2. P < 0.001 in each case
  3. Abbreviations: PDQ-8 8-item Parkinson’s disease Questionnaire, PDQ-39 39-item Parkinson’s disease Questionnaire