![]() In recent decades, there have been significant advances in our understanding of the relationship between sleep disorders and PD, yet many questions remain unanswered. In China, approximately 48–89% of Chinese patients with PD are affected by sleep disorders. Parkinson's disease (PD) is the second most common neurodegenerative disorder in the world. The PDSS-2 score is reliable in assessing sleep disorders in Parkinson's disease with internal consistency 0.706, and the validity value is 80%. The second reliability test was declared reliable with each value of Cronbach alpha 0.833 and 0.644 ( r table value = 0.60), with inter-rater reliability value is 0.706. ![]() The validity test value on the two examinations showed 9 of 15 items (60% validity) and 7 of 15 items (46.6% validity). The study subjects were 15 PD patients, range age between 51 and 75 years (63.0 ± 8.95). Then measure the Pearson correlation test between two examinations (validity test) and reliability by calculating the Cronbach's alpha PDSS-2 value, and inter-rater reliability to determine internal consistency. Assessment is done twice with an interval of examination 10 min. The PDSS-2 score is used to assess sleep disorders. The study was conducted on Parkinson's patients with sleep disorders that the inclusion criteria are women or men aged >40 years, diagnosed with Parkinson's disease. This study aims to measure the level of validity and reliability of PDSS-2 in Parkinson's disease with sleep disorders.
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