Validity of the Japanese version of the REM Sleep Behavior Disorder (RBD) Screening Questionnaire for detecting probable RBD in the general population. Issue 8 (5th April 2015)

• Record Type: Journal Article
• Authors: Nomura, Takashi; Inoue, Yuichi; Kagimura, Tatsuo; Kusumi, Masayoshi; Nakashima, Kenji
• Is Part Of: Psychiatry and clinical neurosciences. Volume 69:Issue 8(2015:Aug.)
• Page Start: 477
• Page End: 482
• Publication Date: 2015-04-05
• Subjects: Psychiatry -- Periodicals; Neurology -- Periodicals; 616.89
• DOI: 10.1111/pcn.12286
• Languages: English
• ISSNs: 1323-1316

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <sec id="pcn12286-sec-0001" sec-type="section"> <title>Aims</title> <p>In order to evaluate the validity of the REM Sleep Behavior Disorder (RBD) Screening Questionnaire (RBDSQ) as a screening tool for RBD in a general population setting, we conducted a validation study using residents of a rural community.</p> </sec> <sec id="pcn12286-sec-0002" sec-type="section"> <title>Methods</title> <p>We sent questionnaires that included the RBDSQ to 2631 eligible adult residents in the town of Daisen, Japan.</p> </sec> <sec id="pcn12286-sec-0003" sec-type="section"> <title>Results</title> <p>Of those residents, 1572 participants (59.7%) gave complete answers to the RBDSQ. Among them, 179 participants (11.4%) scored ≥5 points on the questionnaire; an additional 149 participants scoring ≤4 points were randomly selected for further telephone interview. Based on obtained results, nine participants (0.57%) were judged as having probable RBD. Receiver–operator curve analysis revealed that a total score of 6 points on the RBDSQ represented the best cut‐off value for detecting probable RBD (sensitivity: 100%; specificity: 73.0%). Analysis based on the item response theory revealed that items 1, 4, 6‐1, 7, and 8 had lower difficulty than the remaining items, suggesting that these items are more essential in the screening for probable RBD.</p> </sec> <sec id="pcn12286-sec-0004" sec-type="section"> <title>Conclusions</title> <p>The present study revealed that a score of 6 points on the RBDSQ could be used as a cut‐off value for the screening of probable RBD in the general population. Evaluation of the distribution of positive items might be helpful for identifying the intensity of a person's RBD symptoms.</p> </sec> </abstract>