Cross-Cultural Validity, Reliability, and Psychometric Properties of the Persian Version of the Scales for Outcomes in Parkinson’s Disease-Psychosocial Questionnaire

Table 3

Reliability (Cronbach’s α) of the SCOPA-PS questionnaire within various subgroups of Iranian Parkinson’s disease patients (𝑛=110).

Subgroups	Cronbach’s α coefficient (95% CI)
Total (𝑛=110)	0.87 (0.83 to 0.90)
Age-group
<65 yr (𝑛=65)	0.88 (0.84 to 0.92)
≥65 yr (𝑛=45)	0.84 (0.76 to 0.90)
Gender
Female (𝑛=34)	0.80 (0.68 to 0.89)
Male (𝑛=76)	0.89 (0.85 to 0.92)
Educational level
Illiterate/primary/secondary (𝑛=36)	0.91 (0.85 to 0.95)
College/university (𝑛=73)	0.83 (0.76 to 0.88)