• 1
    Thomas AC, Staiger PK, McCabe M. Implementation and evaluation of brief depression and anxiety screening in clients contacting a drug and alcohol service. Drug Alcohol Rev 2012;31:303310.
  • 2
    Howard KI, Lueger RJ, Maling MS, Martinovich Z. A phase model of psychotherapy outcome: causal mediation of change. J Consult Clin Psychol 1993;61:678685.
  • 3
    NICE. Alcohol use disorders: diagnosis, assessment and management of harmful drinking and alcohol dependence. NICE clinical guideline 115. 2011.
  • 4
    Barts and The London School of Medicine and Dentistry. Outcomes compendium. National Institute for Mental Health in England. 2009.
  • 5
    Raistrick D, Bradshaw J, Tober G, Weiner J, Allison J, Healey C. Development of the Leeds Dependence Questionnaire (LDQ): a questionnaire to measure alcohol and opiate dependence in the context of a treatment evaluation package. Addiction 1994;89:563572.
  • 6
    Evans C. The CORE-OM (Clinical Outcomes in Toutine Evaluaton) and its derivatives. Integrating Science and Practice 2012;2:1215.
  • 7
    Corney RH, Clare AW. The construction, development and testing of a self-report questionnaire to identify social problems. Psychol Med 1985;15:637649.
  • 8
    Raistrick D, Tober G, Heather N, Clark JA. Validation of the social satisfaction questionnaire for outcome evaluation in substance use disorders. Psychiatr Bull 2007;31:333336.
  • 9
    Raistrick D, Heather N, Godfrey C, National Treatment Agency for Substance Misuse. Review of the effectiveness of treatment for alcohol problems. National Treatment Agency for Substance Misuse. 2006.
  • 10
    Heather N, Raistrick D, Tober G, Godfrey C, Parrott S. Leeds Dependence Questionnaire: new data from a large sample of clinic attenders. Addict Res Theory 2001;9:253269.
  • 11
    Paton-Simpson GR, MacKinnon SK. Evaluation of the Leeds Dependence Questionnaire (LDQ) for New Zealand. Alcohol Advisory Council of New Zealand. 1999.
  • 12
    Lennings CJ. An evaluation of the Leeds Dependence Questionnaire. J Child Adolesc Subst Abuse 1999;8:7387.
  • 13
    Ford P. An evaluation of the Dartmouth Assessment of Lifestyle Inventory and the Leeds Dependence Questionnaire for use among detained psychiatric inpatients. Addiction 2003 98:111118.
  • 14
    Kelly JF, Magill M, Slaymaker V, Kahler C. Psychometric validation of the Leeds Dependence Questionnaire (LDQ) in a young adult clinical sample. Addict Behav 2010;35:331336.
  • 15
    Barkham M, Bewick B, Mullin T, et al. The CORE-10: a short measure of psychological distress for routine use in the psychological therapies. Counselling and Psychotherapy Research Journal 2012;13:313.
  • 16
    Raistrick D, Tober G, Godfrey C, Parrott S. Treatment as usual, in responding to drug misuse: research and policy priorities. In: MacGregor S, ed. Health and social care. Routledge, 2010:4052.
  • 17
    Raistrick D, Tober G, Sweetman J, Crosby H, Evans T. Measuring clinically significant outcomes—LDQ, CORE-10, and SSQ as dimension measures of addiction. Psychiatric Bull 2014; doi:10.1192/pb.bp.112.041301.
  • 18
    Revelle W. An introduction to psychometric theory with applications in R. 2013. Available at: (accessed on December 2013).
  • 19
    Kaiser HF. An index of factorial simplicity. Psychometrika 1974;39:3136.
  • 20
    Bartlett MS. A note on the multiplying factors for various χ2 approximations. J Roy Stat Soc B 1954;16:296298.
  • 21
    Lorenzo-Seva U. Promin: a method for oblique factor rotation. Multivariate Behav Res 1999;34:347365.
  • 22
    Browne MW. An overview of analytic rotation in exploratory factor analysis. Multivariate Behav Res 2001;36:111150.
  • 23
    Horn J. A rationale and test for the number of factors in factor analysis. Psychometrika 1965;30:179185.
  • 24
    Lorenzo-Seva U, Timmerman ME, Kiers HAL. The Hull method for selecting the number of common factors. Multivariate Behav Res 2011;46:340364.
  • 25
    Lorenzo-Seva U, Ferrando PJ. FACTOR 9.2: A Comprehensive Program for Fitting Exploratory and Semiconfirmatory Factor Analysis and IRT Models. Appl Psychol Meas 2013;37:497498.
  • 26
    Comrey AL, Lee HB. A first course in factor analysis. Hillsdale: L. Erlbaum Associates, 1992.
  • 27
    Muthén LK, Muthén BO. Mplus user's guide, Sixth edn. Los Angeles, CA: Muthén & Muthén, 1998–2011.
  • 28
    Schermelleh-Engel K, Moosbrugger H, Müller H. Evaluating the fit of structural equation models: tests of significance and descriptive goodness-of-fit measures. MPR-Online 2003;8:2374.
  • 29
    Marsden J, Farrell M, Bradbury C, et al. Development of the treatment outcomes profile. Addiction 2008;103:14501460.
  • 30
    Sweetman J, Raistrick D, Mdege ND, Crosby H. A systematic review of substance misuse assessment packages. Drug Alcohol Rev 2013;32:347355.
  • 31
    Thomas ML. The value of item response theory in clinical assessment: a review. Assessment 2011;18:291307.