Subtypes of Sleep Disturbance in Parkinson’s Disease Based on the Cross-Culturally Validated Korean Version of Parkinson’s Disease Sleep Scale-2

Hui-Jun YangHan-Joon KimSeong-Beom KohJoong-Seok KimTae-Beom AhnSang-Myung CheonJin Whan ChoYoon-Joong KimHyeo-Il MaMee Young ParkJong Sam BaikPhil Hyu LeeSun Ju ChungJong-Min KimIn-Uk SongJi-Young KimYoung-Hee SungDo Young KwonJae-Hyeok LeeJee-Young LeeJi Seon KimJi Young YunHee Jin KimJin Yong HongMi-Jung KimJinyoung YounJi Sun KimEung Seok OhWon Tae YoonSooyeoun YouKyum-Yil KwonHyung-Eun ParkSu-Yun LeeYounsoo KimHee-Tae KimSang Jin Kim
Dept. of Neurology (신경과학)
Issue Date
Journal of Clinical Neurology, Vol.16(1) : 66-74, 2020
Background and Purpose: This study aimed to determine the clinimetric properties of the Korean version of Parkinson's Disease Sleep Scale-2 (K-PDSS-2) and whether distinct subtypes of sleep disturbance can be empirically identified in patients with Parkinson's disease (PD) using the cross-culturally validated K-PDSS-2. Methods: The internal consistency, test–retest reliability, scale precision, and convergent validity of K-PDSS-2 were assessed in a nationwide, multicenter study of 122 patients with PD. Latent class analysis (LCA) was used to derive subgroups of patients who experienced similar patterns of sleep-related problems and nocturnal disabilities. Results: The total K-PDSS-2 score was 11.67±9.87 (mean±standard deviation) at baseline and 12.61±11.17 at the retest. Cronbach's α coefficients of the total K-PDSS-2 scores at baseline and follow-up were 0.851 and 0.880, respectively. The intraclass correlation coefficients over the 2-week study period ranged from 0.672 to 0.848. The total K-PDSS-2 score was strongly correlated with health-related quality of life measures and other corresponding nonmotor scales. LCA revealed three distinct subtypes of sleep disturbance in the study patients: “less-troubled sleepers,” “PD-related nocturnal difficulties,” and “disturbed sleepers.” Conclusions: K-PDSS-2 showed good clinimetric attributes in accordance with previous studies that employed the original version of the PDSS-2, therefore confirming the cross-cultural usefulness of the scale. This study has further documented the first application of an LCA approach for identifying subtypes of sleep disturbance in patients with PD.
Parkinson diseasesleepParkinson's Disease Sleep Scale-2Korean versionvaliditylatent class analysis
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