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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