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Validity and reliability of the Turkish version of the Jenkins Sleep Scale in psoriatic arthritis

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Abstract

Objective

The aim of this study is to investigate the validity and reliability of the Turkish version of Jenkins Sleep Scale (JSS) in psoriatic arthritis (PsA).

Methods

Patients with PsA according to Classification Criteria for Psoriatic Arthritis (CASPAR) were included in the study. Data about age, sex, body mass index (BMI), disease duration (month) and joint symptom duration (month) were noted. Psoriatic Arthritis Quality of Life (PsAQoL) Scale was used to assess the quality of life, Multidimensional Assessment of Fatigue (MAF) Scale was used to evaluate fatigue, and Pittsburgh Sleep Quality Index (PSQI) was used to evaluate sleep quality. The reliability of JSS scale was determined by internal consistency (Cronbach’s alpha coefficient). Face validity and construct validity (convergent and divergent validities) were evaluated. The correlation of the JSS with the PSQI, MAF scale, and PsAQoL scale was assessed for convergent validity. The correlation of the JSS with age, body mass index (BMI), duration of joint symptoms and disease duration were assessed for divergent validity.

Results

The mean age of 56 patients was 42.71 ± 11.79. The Cronbach’s alpha of the JSS was 0.862. The JSS had significant correlations with PSQI (rho = 0.653, P < 0.001), MAF (rho = 0.457, P < 0.001), PsAQoL (rho = 0.496, P < 0.001). There were no significant correlations between JSS and age (rho = − 0.052, P = 0.716), BMI (rho = − 0.085, P = 0.550), disease duration (rho = 0.161, P = 0.276) and duration of joint symptoms (rho = 0.107, P = 0.474).

Conclusion

The Turkish version of JSS is a valid and reliable instrument in PsA.

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Acknowledgements

The authors thank all of the patients who participated in this study.

Funding

No funding was received.

Author information

Authors and Affiliations

  1. Rheumatology Division, Department of Physical Medicine and Rehabilitation, Marmara University Faculty of Medicine, Istanbul, Turkey

    Mehmet Tuncay Duruöz, Didem Erdem & Hatice Şule Baklacıoğlu

  2. Department of Physical Medicine and Rehabilitation, Marmara University Faculty of Medicine, Istanbul, Turkey

    Kardelen Gencer & Fırat Ulutatar

Authors
  1. Mehmet Tuncay Duruöz
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  2. Didem Erdem
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  3. Kardelen Gencer
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  4. Fırat Ulutatar
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  5. Hatice Şule Baklacıoğlu
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Corresponding author

Correspondence to Didem Erdem.

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Conflict of interest

The authors declare no conflict of interest.

Ethical approval

The study was approved by the Ethical Committee of Marmara University Faculty of Medicine. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.

Informed consent

Informed consent was obtained from all individual participants included in the study.

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Duruöz, M.T., Erdem, D., Gencer, K. et al. Validity and reliability of the Turkish version of the Jenkins Sleep Scale in psoriatic arthritis. Rheumatol Int 38, 261–265 (2018). https://doi.org/10.1007/s00296-017-3911-2

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  • DOI: https://doi.org/10.1007/s00296-017-3911-2

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