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Sleep and Breathing

, 13:259 | Cite as

Psychometric properties of the Persian version of the Pittsburgh Sleep Quality Index addendum for PTSD (PSQI-A)

  • Jeiran Farrahi
  • Nouzar Nakhaee
  • Vahid Sheibani
  • Behshid Garrusi
  • Ahmad Amirkafi
Original Article

Abstract

Background

Considering the frequent occurrence of natural disasters in Iran, the need for an inventory assessing the quality of sleep in the posttraumatic stress disorder (PTSD) patients is clearly evident. The Pittsburgh Sleep Quality Index addendum for PTSD (PSQI-A) has been recently developed to assess the disruptive nocturnal behaviors in the PTSD patients. This study was aimed to explore the reliability and validity of the Persian version of the PSQI-A.

Materials and methods

Eighty-five PTSD patients related to the two recent major earthquakes of Kerman Province were enrolled in the study, and 133 healthy subjects were conveniently selected as the control group. The inventory was translated and then back-translated according to standard methods. The reliability was checked by computing the Cronbach`s alpha coefficient and corrected item-total correlation. The sensitivity and specificity were assessed by comparing the PSQI-A score with the DSM-IV-TR diagnosis. Convergent validity was checked against the General Health Questionnaire 12 (GHQ-12).

Results

The mean (±SD) of the two groups were 42.1(±13.8) and 34.2 (±9.8), respectively. The sex distribution was comparable in the two groups (females consisted 55% and 58% of the PTSD and control groups, respectively). There were significant differences between the items comparing the two groups except for the “acting out dreams”. Overall the Cronbach`s alpha coefficient was 0.89, and the item-total correlation of all the seven items were over 0.4 except for the acting out dreams. At cut-off of 7/8, the sensitivity and specificity were 100% and 93%, respectively. The sum score showed a correlation of 0.66 with the GHQ-12.

Conclusion

Although the psychometric properties of one of the seven items of the inventory were to some extent unsatisfactory, the overall reliability and validity of the questionnaire were acceptable.

Keywords

PTSD Validity Reliability Questionnaire Psychometrics Iran 

Notes

Acknowledgment

We gratefully acknowledge the financial support of Kerman Neuroscience Research Center.

References

  1. 1.
    Grinage BD (2003) Diagnosis and management of post-traumatic stress disorder. Am Fam Physician 68(12):2401–2408PubMedGoogle Scholar
  2. 2.
    Vieweg WVR, Julius DA, Fernandez A, Beatty-Brooks M, Hettema JM, Pandurangi AK (2006) Posttraumatic stress disorder: clinical features, pathophysiology, and treatment. Am J Med 119:383–390. doi: 10.1016/j.amjmed.2005.09.027 PubMedCrossRefGoogle Scholar
  3. 3.
    Montazeri A, Baradaran H, Omidvari S, Azin SA, Ebadi M, Garmaroudi G et al (2005) Psychological distress among Bam earthquake survivors in Iran: a population-based study. BMC Public Health 5:4. doi: 10.1186/1471-2458-5-4 PubMedCrossRefGoogle Scholar
  4. 4.
    Hashemian F, Khoshnood K, Desai MM, Falahati F, Kasl S, Southwick S (2006) Anxiety, depression, and posttraumatic stress in Iranian survivors of chemical warfare. JAMA 296:560–566. doi: 10.1001/jama.296.5.560 PubMedCrossRefGoogle Scholar
  5. 5.
    Breslau N, Roth T, Burduvali E, Kapke A, Schultz L, Roehrs T (2004) Sleep in lifetime posttraumatic stress disorder. Arch Gen Psychiatry 61:508–516. doi: 10.1001/archpsyc.61.5.508 PubMedCrossRefGoogle Scholar
  6. 6.
    Ziaaddini H, Nakhaee N, Behzadi K (2009) Prevalence and correlates of PTSD among high school students after the earthquake disaster in the city of Bam, Iran. Am J App Sci 6(1):130–132CrossRefGoogle Scholar
  7. 7.
    Ohayon MM, Shapiro CM (2000) Sleep disturbances and psychiatric disorders associated with posttraumatic stress disorder in the general population. Compr Psychiatry 41(6):469–478. doi: 10.1053/comp.2000.16568 PubMedCrossRefGoogle Scholar
  8. 8.
    Germain A, Hall M, Krakow B, Shear MK, Buysse DJ (2005) A brief sleep scale for posttraumatic stress disorder: Pittsburgh sleep quality index addendum for PTSD. J Anxiety Disord 19:233–244. doi: 10.1016/j.janxdis.2004.02.001 PubMedCrossRefGoogle Scholar
  9. 9.
    American Psychiatric Association Diagnostic and Statistical Manual of Mental Disorders (2000) 4th ed. American Psychiatric Press, Washington. Text revision.Google Scholar
  10. 10.
    Spoormaker VI, Schredl M, Bout JVD (2006) Nightmares: from anxiety symptom to sleep disorder. Sleep Med Rev 10:19–31. doi: 10.1016/j.smrv.2005.06.001 PubMedCrossRefGoogle Scholar
  11. 11.
    Nunnally JC, Bernstein IH (1994) Psychometric theory, 3rd edn. McGraw-Hill, New YorkGoogle Scholar
  12. 12.
    Ware JE Jr, Gandek B (1998) Methods for testing data quality, scaling assumptions, and reliability: the IQOLA Project approach. International Quality of Life Assessment. J Clin Epidemiol 51(11):945–52PubMedCrossRefGoogle Scholar
  13. 13.
    Montazeri A, Harirchi AM, Shariati M, Garmaroudi G, Ebadi M, Fateh A (2003) The 12-item General Health Questionnaire (GHQ-12): translation and validation study of the Iranian version. Health Qual Life Outcome 1:66CrossRefGoogle Scholar
  14. 14.
    Aloba OO, Adewuya AO, Ola BA, Mapayi BM (2007) Validity of the Pittsburgh Sleep Quality Index (PSQI) among Nigerian university students. Sleep Med 8:266–270PubMedCrossRefGoogle Scholar
  15. 15.
    Ross RJ, Ball WA, Sullivan KA, Caroff SN (1989) Sleep disturbance as the hallmark of posttraumatic stress disorder. Am J Psychiatry 146:697–707PubMedGoogle Scholar
  16. 16.
    Koren D, Arnon I, Lavie P, Klein E (2002) Sleep complaints as early predictors of posttraumatic stress disorder: a 1-year prospective study of injured survivors of motor vehicle accidents. Am J Psychiatry 159:855–857PubMedCrossRefGoogle Scholar
  17. 17.
    Van Ommeren M, de Jong Jt, Komproe I (2002) Post-traumatic stress disorder and sleep. N Engl J Med 346(17):1334PubMedCrossRefGoogle Scholar
  18. 18.
    Jaeschke R, Guyatt GH, Sackett DL (1994) Users’ guides to the medical literature: III. How to use an article about a diagnostic test. B. What are the results and will they help me in caring for my patients. JAMA 271:703–707PubMedCrossRefGoogle Scholar

Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • Jeiran Farrahi
    • 1
  • Nouzar Nakhaee
    • 1
  • Vahid Sheibani
    • 1
  • Behshid Garrusi
    • 1
  • Ahmad Amirkafi
    • 1
  1. 1.Kerman Neuroscience Research CenterKerman University of Medical SciencesKermanIran

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