Modified Parkinson’s Disease Sleep Scale (MPDSS) in Thai Parkinson’s Disease Patients
Suebpong Tanasanvimon MD*, Nipan Israsena Na Ayuthaya MD, Ph D**, Kammant Phanthumchinda MD*
Affiliation : * Department of Medicine, Faculty of Medicine, Chulalongkorn University, Bangkok ** Department of Pharmacology, Faculty of Medicine Chulalongkorn University, Bangkok
Background : Parkinson’s Disease Sleep Scale (PDSS) has been recently developed for clinical evaluation of
sleep problems in PD. The modified PDSS (MPDSS) has been developed in the presented study.
Objective : To evaluate the usefulness of MPDSS and sleep problems in Thai PD patients.
Materials and Methods : A cross sectional study in 50 PD patients was conducted at King Chulalongkorn
Memorial Hospital. Sleep problems were assessed by the MPDSS, which has more items to cover more aspects
of sleep problems in PD than PDSS.
Results : MPDSS showed good reliability (Cronbach’s Alpha = 0.842). Some Problems regarding the clinical
use of MPDSS in Thai patients were detected especially related to the meaning of visual analogue scale. Self-
assessment of sleep in PD patients reveal sleep problems only 58%, while MPDSS probed sleep problems in
76% of PD patients. Nocturnal motor symptoms, snoring, sleep initiation and maintenance problem and
nocturia were common in Thai PD patients. Disease staging had significant correlation with MPDSS. Preva-
lence of sleep disorders and trend of each score in PDSS were similar to previous studies in Western countries.
Conclusion : MPDSS is useful for screening and evaluation of sleep problems in Thai PD patients. Neverthe-
less, some modifications, especially the visual analogue scale, may be needed to simplify its practical utility.
Prevalence and trend of sleep problems in Thai PD patients were similar to the previous studies in Western
countries.
Keywords : Modified Parkinson’s disease sleep scale (MPDSS), Sleep disorders, Parkinson’s disease
