Quality of Life Research

, Volume 24, Issue 2, pp 287–293 | Cite as

Combination of classical test theory (CTT) and item response theory (IRT) analysis to study the psychometric properties of the French version of the Quality of Life Enjoyment and Satisfaction Questionnaire-Short Form (Q-LES-Q-SF)

  • Stéphanie Bourion-BédèsEmail author
  • Raymund Schwan
  • Jonathan Epstein
  • Vincent Laprevote
  • Alex Bédès
  • Jean-Louis Bonnet
  • Cédric Baumann



The study aimed to examine the construct validity and reliability of the Quality of Life Enjoyment and Satisfaction Questionnaire-Short Form (Q-LES-Q-SF) according to both classical test and item response theories.


The psychometric properties of the French version of this instrument were investigated in a cross-sectional, multicenter study. A total of 124 outpatients with a substance dependence diagnosis participated in the study. Psychometric evaluation included descriptive analysis, internal consistency, test–retest reliability, and validity. The dimensionality of the instrument was explored using a combination of the classical test, confirmatory factor analysis (CFA), and an item response theory analysis, the Person Separation Index (PSI), in a complementary manner.


The results of the Q-LES-Q-SF revealed that the questionnaire was easy to administer and the acceptability was good. The internal consistency and the test–retest reliability were 0.9 and 0.88, respectively. All items were significantly correlated with the total score and the SF-12 used in the study. The CFA with one factor model was good, and for the unidimensional construct, the PSI was found to be 0.902.


The French version of the Q-LES-Q-SF yielded valid and reliable clinical assessments of the quality of life for future research and clinical practice involving French substance abusers. In response to recent questioning regarding the unidimensionality or bidimensionality of the instrument and according to the underlying theoretical unidimensional construct used for its development, this study suggests the Q-LES-Q-SF as a one-dimension questionnaire in French QoL studies.


Quality of life Substance abusers Psychometric validation 


Conflict of interest



  1. 1.
    Hope, M., Page, A., & Hooke, G. (2009). The value of adding the Quality of Life Enjoyment and Satisfaction Questionnaire to outcome assessments of psychiatric inpatients with mood and affective disorders. Quality of Life Research, 18, 647–655.PubMedCrossRefGoogle Scholar
  2. 2.
    De Maeyer, J., Vanderplasschen, W., & Broekaert, E. (2010). Quality of life among opiate-dependent individuals: A review of the literature. International Journal of Drug Policy, 21, 364–380.PubMedCrossRefGoogle Scholar
  3. 3.
    Rudolf, H., & Watts, J. (2002). Quality of life in substance abuse and dependency. International Review of Psychiatry, 14(3), 190–197.CrossRefGoogle Scholar
  4. 4.
    De Maeyer, J., Vanderplasschen, W., Lammertyn, J., Van Nieuwenhuizen, C., Sabbe, B., & Broekaert, E. (2011). Current quality of life and its determinants among opiate-dependent individuals five years after starting methadone treatment. Quality of Life Research, 20, 139–150.PubMedCentralPubMedCrossRefGoogle Scholar
  5. 5.
    Zubaran, C., & Foresti, K. (2009). Quality of life and substance use: Concepts and recent tendencies. Current Opinion in Psychiatry, 22(3), 281–286.PubMedCrossRefGoogle Scholar
  6. 6.
    Luquiens, A., Reynaud, M., Falissard, B., & Aubin, H. J. (2012). Quality of life among alcohol-dependent patients: How satisfactory are the available instruments? A systematic review. Drug and Alcohol Dependence, 125, 192–202.PubMedCrossRefGoogle Scholar
  7. 7.
    Endicott, J., Nee, J., Harrisson, J., & Blumenthal, R. (1993). Quality of life enjoyment and satisfaction questionnaire: A new measure. Psychopharmacology Bulletin, 29, 321–326.Google Scholar
  8. 8.
    Ritsner, M., Kurs, R., Kostizky, H., Ponizovsky, A., & Modai, I. (2002). Subjective quality of life in severely mentally ill patients: A comparison of two instruments. Quality of Life Research, 11(6), 553–561.PubMedCrossRefGoogle Scholar
  9. 9.
    Stevanovic, D. (2011). Quality of Life Enjoyment and Satisfaction Questionnaire-short form for quality of life assessments in clinical practice: A psychometric study. Journal of Psychiatric and Mental Health Nursing, 18, 747–750.CrossRefGoogle Scholar
  10. 10.
    Mick, E., Faraone, S., Spencer, T., Zhang, H., & Biederman, J. (2008). Assessing the validity of the quality of life enjoyment and satisfaction questionnaire-short form in adults with ADHD. Journal of attention disorders, 11, 504–509.PubMedCrossRefGoogle Scholar
  11. 11.
    Wyrwich, K., Harnam, N., Revicki, A., Locklear, J., Svedsater, H., & Endicott, J. (2011). Assessment of Quality of Life Enjoyment and Satisfaction Questionnaire-Short Form responder thresholds in generalized anxiety disorder and bipolar disorder studies. International Clinical Psychopharmacology, 26(3), 121–129.PubMedCrossRefGoogle Scholar
  12. 12.
    Stevanovic, D. (2014). Is the Quality of Life Enjoyment and Satisfaction Questionnaire-Short Form (Q-LES-Q-SF) a unidimensional or bidimensional instrument? Quality of Life Research, 23(4), 1299–1300.PubMedCrossRefGoogle Scholar
  13. 13.
    Lee, Y. T., Liu, S. I., Huang, H. C., Sun, F. J., Huang, C. R., & Yeung, A. (2014). Validity and reliability of the Chinese version of the Short Form of Quality of life Enjoyment and Satisfaction Questionnaire (Q-LES-Q-SF). Quality of Life Research, 23(3), 907–916.PubMedCrossRefGoogle Scholar
  14. 14.
    American Psychiatric Association. (2000). Diagnostic and statistical manual of mental disorders, 4th edition, Text revision. Washington, DC: American Psychiatric Association.CrossRefGoogle Scholar
  15. 15.
    Nunnally, J. C., & Bernstein, I. (1994). Psychometric theory (3rd ed., p. 736). New York, NY: McGraw-Hill Humanities.Google Scholar
  16. 16.
    Gandek, B., Ware, J., Aaronson, N., Apolone, G., Bjorner, J., Brazier, J., et al. (1998). Cross-Validation of Item Selection and Scoring for the SF-12 Health Survey in Nine Countries: Results from the IQOLA Project. Journal of Clinical Epidemiology, 51(11), 1171–1178.PubMedCrossRefGoogle Scholar
  17. 17.
    Terwee, C. B., Bot, S. D., van der De Boer, M. R., Windt, D. A., Knol, D. L., Dekker, J., et al. (2007). Quality criteria were proposed for measurement properties of health status questionnaires. Journal of Clinical Epidemiology, 60, 34–42.PubMedCrossRefGoogle Scholar
  18. 18.
    Schermelleh-Engel, K., Moosbrugger, H., & Muller, H. (2003). Evaluating the fit of structural equation models: Tests of significance and descriptive goodness-of-fit measures. Methods Psychol Res Online, 8(2), 23–74.Google Scholar
  19. 19.
    Yu, C. Y. (2002). Evaluating cutoff criteria of model fit indices for latent variable models with binary and continuous outcomes. Los Angeles, CA: University of California.Google Scholar
  20. 20.
    Dickes, P., Tournois, J., Flieller, A., & Kop, J. L. (1994). La psychométrie (p. 288). Paris: Presses Universitaires France.Google Scholar
  21. 21.
    Saad, S., Carter, G. W., Rothenberg, M., & Israelson, E. (1999). Testing and assessment: An employer’s guide to good practices. Washington, DC: U.S. Department of Labor of Employment and Training Administration.Google Scholar
  22. 22.
    Fayers, P. M., & Machin, D. (2000). Quality of life: Assessment, analysis and interpretation. Chichester: Wiley.CrossRefGoogle Scholar
  23. 23.
    Cicchetti, D. V. (1994). Guidelines, criteria, and rules of thumb for evaluating normed and standardized assessment instruments in psychology. Psychological Assessment, 6, 284–290.CrossRefGoogle Scholar
  24. 24.
    Stark, S., Chernyshenko, O. S., Chan, K. Y., Lee, W. C., & Drasgow, F. (2001). Effects of the testing situation on item responding: Cause for concern. Journal of Applied Psychology, 86(5), 943–953.PubMedCrossRefGoogle Scholar
  25. 25.
    Reise, S. P., & Henson, J. M. (2003). A discussion of modern versus traditional psychometrics as applied to personality assessment scales. Journal of Personality Assessment, 81(2), 93–103.PubMedCrossRefGoogle Scholar
  26. 26.
    Linacre, J. M. (2002). What do infit and outfit, mean-square and standardized mean? Rasch Measurement Transactions, 16, 878.Google Scholar
  27. 27.
    Rossi, A., Rucci, P., Mauri, M., Maina, G., Pieraccini, F., Pallanti, S., et al. (2005). Validity and reliability of the Italian version of the Quality of Life, Enjoyment and Satisfaction Questionnaire. Quality of Life Research, 14, 2323–2328.PubMedCrossRefGoogle Scholar
  28. 28.
    Rapaport, M., Clary, C., Fayyad, R., & Endicott, J. (2005). Quality of life impairment in depressive and anxiety disorders. American Journal of Psychiatry, 162, 1171–1178.PubMedCrossRefGoogle Scholar
  29. 29.
    Ponizovsky, A., & Grinshpoon, A. (2007). Quality of life among heroin users on buprenorphine versus methadone maintenance. The American Journal of Drug and Alcohol Abuse, 33(5), 631–642.PubMedCrossRefGoogle Scholar
  30. 30.
    Stedman, M., Pettinati, H., Brown, E., Kotz, M., Calabrese, J., & Raines, S. (2010). A double-blind, placebo-controlled study with quetiapine as adjunct therapy with lithium or divalproex in bipolar I patients with coexisting alcohol dependence. Alcoholism, Clinical and Experimental Research, 34(10), 1822–1831.PubMedCrossRefGoogle Scholar
  31. 31.
    Johnson, B., Ait-Daoud, N., Akhtar, F., & Ma, J. (2004). Oral topiramate reduces the consequences of drinking and improves the quality of life of alcohol-dependent individuals: A randomized controlled trial. Archives of General Psychiatry, 61, 905–912.PubMedCrossRefGoogle Scholar

Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  • Stéphanie Bourion-Bédès
    • 1
    • 2
    • 3
    Email author
  • Raymund Schwan
    • 2
  • Jonathan Epstein
    • 3
    • 4
  • Vincent Laprevote
    • 2
  • Alex Bédès
    • 5
  • Jean-Louis Bonnet
    • 6
  • Cédric Baumann
    • 3
    • 4
  1. 1.Service médico-psychologique régionalMetzFrance
  2. 2.CSAPA (Health Care Centre of Accompaniment and Prevention in Addictology)University Hospital of NancyNancyFrance
  3. 3.EA4360 APEMACUniversity of LorraineNancyFrance
  4. 4.Service d’épidémiologie et évaluation cliniques, INSERM CIC-EC CIE6CHU de NancyNancyFrance
  5. 5.ANPAA 15-CSAPA (Health Care Centre of Accompaniment and Prevention in Addictology)Saint-FlourFrance
  6. 6.ANPAA 15-CSAPA (Health Care Centre of Accompaniment and Prevention in Addictology)AurillacFrance

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