Subtypes of Sleep Disturbance in Parkinson's Disease Based on the Cross-Culturally Validated Korean Version of Parkinson's Disease Sleep Scale-2
- Author:
Hui Jun YANG
1
;
Han Joon KIM
;
Seong Beom KOH
;
Joong Seok KIM
;
Tae Beom AHN
;
Sang Myung CHEON
;
Jin Whan CHO
;
Yoon Joong KIM
;
Hyeo Il MA
;
Mee Young PARK
;
Jong Sam BAIK
;
Phil Hyu LEE
;
Sun Ju CHUNG
;
Jong Min KIM
;
In Uk SONG
;
Ji Young KIM
;
Young Hee SUNG
;
Do Young KWON
;
Jae Hyeok LEE
;
Jee Young LEE
;
Ji Seon KIM
;
Ji Young YUN
;
Hee Jin KIM
;
Jin Yong HONG
;
Mi Jung KIM
;
Jinyoung YOUN
;
Ji Sun KIM
;
Eung Seok OH
;
Won Tae YOON
;
Sooyeoun YOU
;
Kyum Yil KWON
;
Hyung Eun PARK
;
Su Yun LEE
;
Younsoo KIM
;
Hee Tae KIM
;
Sang Jin KIM
Author Information
- Publication Type:Original Article
- From:Journal of Clinical Neurology 2020;16(1):66-74
- CountryRepublic of Korea
- Language:English
-
Abstract:
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,â€â€œPD-related nocturnal difficulties,†and “disturbed sleepers.â€
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.
