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Validity and reliability of the Persian version of the Insomnia Diurnal Impact Scale (IDIS)

  • Psychiatrics • Original Article
  • Published:
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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.

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Funding

This study was funded by grant number 97-02-204-33580 from the Clinical Research Development Center of the Rasoul Akram Hospital, Iran University of Medical Sciences.

Author information

Authors and Affiliations

  1. Department of Clinical Psychology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran

    Hoda Doos Ali Vand

  2. School of Behavioral Sciences and Mental Health (Tehran Institute of Psychiatry), Iran University of Medical Sciences, Tehran, Iran

    Fahimeh AhmadianVargahan

  3. School of Psychology, National Research University Higher School of Economics, Moscow, Russia

    Morteza Charkhabi

  4. Department of Psychology, University of Clermont Auvergne, Clermont-Ferrand, France

    Morteza Charkhabi

  5. Department of Psychiatry, School of Behavioral Sciences and Mental Health (Tehran Institute of Psychiatry), Iran University of Medical Sciences, Tehran, Iran

    Mir Farhad Ghaleh Bandi

  6. Occupational Sleep Research Center, Baharloo Hospital, Tehran University of Medical Sciences, Tehran, Iran

    Khosro Sadeghniiat Haghighi

  7. Health Promotion Research Center, Iran University of Medical Sciences, Tehran, Iran

    Mojtaba Habibi

  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

    Mojtaba Habibi

Authors
  1. Hoda Doos Ali Vand
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  2. Fahimeh AhmadianVargahan
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  3. Morteza Charkhabi
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  4. Mir Farhad Ghaleh Bandi
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  5. Khosro Sadeghniiat Haghighi
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  6. Mojtaba Habibi
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Corresponding author

Correspondence to Mojtaba Habibi.

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Conflict of interests

Hoda Doos Ali Vand, Fahimeh Ahmadian Vargahan, Morteza Charkhabi, Mir Farhad Ghaleh Bandi, Khosro Sadeghniiat Haghighi declare that they have no conflict of interest. Mojtaba Habibi has received research grants from the Clinical Research Development Center of the Rasoul Akram Hospital, Iran University of Medical Sciences.

Ethical approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. This article does not contain any studies with animals performed by any of the authors.

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Written consent form was obtained from all participants prior to their participation in this study.

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Doos Ali Vand, H., AhmadianVargahan, F., Charkhabi, M. et al. Validity and reliability of the Persian version of the Insomnia Diurnal Impact Scale (IDIS). Sleep Breath 25, 449–457 (2021). https://doi.org/10.1007/s11325-020-02116-y

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  • DOI: https://doi.org/10.1007/s11325-020-02116-y

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