Hoda Doos Ali Vand1, Fahimeh AhmadianVargahan2, Morteza Charkhabi3,4, Mir Farhad Ghaleh Bandi5, Khosro Sadeghniiat Haghighi6, Mojtaba Habibi7,8. 1. Department of Clinical Psychology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran. 2. School of Behavioral Sciences and Mental Health (Tehran Institute of Psychiatry), Iran University of Medical Sciences, Tehran, Iran. 3. School of Psychology, National Research University Higher School of Economics, Moscow, Russia. 4. Department of Psychology, University of Clermont Auvergne, Clermont-Ferrand, France. 5. Department of Psychiatry, School of Behavioral Sciences and Mental Health (Tehran Institute of Psychiatry), Iran University of Medical Sciences, Tehran, Iran. 6. Occupational Sleep Research Center, Baharloo Hospital, Tehran University of Medical Sciences, Tehran, Iran. 7. Health Promotion Research Center, Iran University of Medical Sciences, Tehran, Iran. Habibi.m@iusm.ac.ir. 8. Department of Health Psychology, School of Behavioral Sciences and Mental Health (Tehran Institute of Psychiatry), Iran University of Medical Sciences, Mansouri St., Niayesh St. Sattarkhan Blvd, P.O. Box 1445613111, Tehran, 14565/441, Iran. Habibi.m@iusm.ac.ir.
Abstract
BACKGROUND: Insomnia disorder is characterized by nighttime and daytime symptoms. The aim of this study was to assess the validity and reliability of a Persian version of the Insomnia Diurnal Impact Scale (IDIS) as a screening tool to evaluate diurnal effects of sleep fragmentation in Iranians. METHODS: Of 300 individuals recruited, 150 had insomnia disorder based on DSM-5 criteria and 150 were good sleepers based on research diagnostic criteria. All subjects completed the IDIS, Pittsburg Sleep Quality Index, Insomnia Severity Index, Depression-Anxiety-Stress Scale-21, and sleep diaries. RESULTS: The Persian version of the IDIS showed adequate psychometric properties for internal consistency and test-retest reliability. The result of principal component analysis confirmed a single component with six items as the final structure of the scale in the insomniac group. The total IDIS score significantly correlated with the Pittsburg Sleep Quality Index, Insomnia Severity Index, and subscales of Depression-Anxiety-Stress Scale-21 verifying the convergent validity of the scale. The Persian version of the IDIS significantly discriminated the insomniac group from the non-insomniac group. The result of the fit estimates for the one-factor unidimensional model met the previously specified fit criteria and adequately fit the data in the non-insomniac group. CONCLUSION: The Persian version of the IDIS was shown to be a valid and reliable clinical tool in evaluating the daytime consequences of insomnia in Iranians.
BACKGROUND: Insomnia disorder is characterized by nighttime and daytime symptoms. The aim of this study was to assess the validity and reliability of a Persian version of the Insomnia Diurnal Impact Scale (IDIS) as a screening tool to evaluate diurnal effects of sleep fragmentation in Iranians. METHODS: Of 300 individuals recruited, 150 had insomnia disorder based on DSM-5 criteria and 150 were good sleepers based on research diagnostic criteria. All subjects completed the IDIS, Pittsburg Sleep Quality Index, Insomnia Severity Index, Depression-Anxiety-Stress Scale-21, and sleep diaries. RESULTS: The Persian version of the IDIS showed adequate psychometric properties for internal consistency and test-retest reliability. The result of principal component analysis confirmed a single component with six items as the final structure of the scale in the insomniac group. The total IDIS score significantly correlated with the Pittsburg Sleep Quality Index, Insomnia Severity Index, and subscales of Depression-Anxiety-Stress Scale-21 verifying the convergent validity of the scale. The Persian version of the IDIS significantly discriminated the insomniac group from the non-insomniac group. The result of the fit estimates for the one-factor unidimensional model met the previously specified fit criteria and adequately fit the data in the non-insomniac group. CONCLUSION: The Persian version of the IDIS was shown to be a valid and reliable clinical tool in evaluating the daytime consequences of insomnia in Iranians.
Authors: Colleen E Carney; Daniel J Buysse; Sonia Ancoli-Israel; Jack D Edinger; Andrew D Krystal; Kenneth L Lichstein; Charles M Morin Journal: Sleep Date: 2012-02-01 Impact factor: 5.849
Authors: Jack D Edinger; Michael H Bonnet; Richard R Bootzin; Karl Doghramji; Cynthia M Dorsey; Colin A Espie; Andrew O Jamieson; W Vaughn McCall; Charles M Morin; Edward J Stepanski Journal: Sleep Date: 2004-12-15 Impact factor: 5.849