Development and validation of the Japanese version of the Athens Insomnia Scale. Issue 6 (5th August 2013)

• Record Type: Journal Article
• Authors: Okajima, Isa; Nakajima, Shun; Kobayashi, Mina; Inoue, Yuichi
• Is Part Of: Psychiatry and clinical neurosciences. Volume 67:Issue 6(2013)
• Page Start: 420
• Page End: 425
• Publication Date: 2013-08-05
• Subjects: Athens Insomnia Scale -- insomnia -- Japanese -- reliability -- validation; Psychiatry -- Periodicals; Neurology -- Periodicals; 616.89
• DOI: 10.1111/pcn.12073
• Languages: English
• ISSNs: 1323-1316

Abstract

Abstract : Aim: The aim of this study was to develop and validate a Japanese version of the Athens Insomnia Scale (AIS‐J). Methods: The AIS‐J was created using a back‐translation design. A total of 477 outpatients with chronic insomnia and 163 individuals from the general community were recruited. Participants were asked to complete the AIS‐J along with two other insomnia scales – Japanese versions of the Pittsburgh Sleep Quality Index and the Insomnia Severity Index. Results: The AIS‐J consisted of a two‐factor structure: 'nocturnal sleep problem' (items 1–5) and 'daytime dysfunction' (items 6–8). Internal consistencycoefficients ranged from 0.78 to 0.88. Correlations between the AIS‐J and the aforementioned authorized scales were 0.81 and 0.85, respectively. Scores on the AIS‐J were significantly higher for the insomnia group than for the control group. The AIS‐J cut‐off value for identifying pathological insomnia was estimated at 6 points or more, and the AIS‐J‐nocturnal cut‐off value was estimated at 4 points or more. Conclusions: The AIS‐J has sufficient validity and diagnostic utility.