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

Table 5 Internal consistency

Scales/subscales	Items	Item-scale correlation^a	Cronbach’s α
PDQ-8		0.56–0.72	0.80
Mobility	Q7	0.62
Activity of daily living	Q12	0.56
Emotional well-being	Q17	0.72
Stigma	Q25	0.66
Social support	Q27	0.57
Cognitions	Q31	0.57
Communication	Q35	0.70
Bodily discomfort	Q37	0.61

ISSN: 1477-7525