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Factor analysis of treatment outcomes from a UK specialist addiction service: Relationship between the L eeds D ependence Q uestionnaire, S ocial S atisfaction Q uestionnaire and 10‐ i tem C linical O utcomes in R outine E valuation
Author(s) -
Fairhurst Caroline,
Böhnke Jan R.,
Gabe Rhian,
Croudace Tim J.,
Tober Gillian,
Raistrick Duncan
Publication year - 2014
Publication title -
drug and alcohol review
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.018
H-Index - 74
eISSN - 1465-3362
pISSN - 0959-5236
DOI - 10.1111/dar.12146
Subject(s) - computer network , computer science
and Aims To examine the relationship between three outcome measures used by a specialist addiction service ( UK ): the Leeds Dependence Questionnaire ( LDQ ), the Social Satisfaction Questionnaire ( SSQ ) and the 10‐item Clinical Outcomes in Routine Evaluation ( CORE ‐10). Design and Method A clinical sample of 715 service user records was extracted from a specialist addiction service (2011) database. The LDQ (dependence), SSQ (social satisfaction) and CORE ‐10 (psychological distress) were routinely administered at the start of treatment and again between 3 and 12 months post‐treatment. A mixed pre/post‐treatment dataset of 526 service users was subjected to exploratory factor analysis. P arallel A nalysis and the H ull method were used to suggest the most parsimonious factor solution. Results Exploratory factor analysis with three factors accounted for 66.2% of the total variance but P arallel A nalysis supported two factors as sufficient to account for observed correlations among items. In the two‐factor solution, LDQ items and nine of the 10 CORE ‐10 items loaded on the first factor > 0.41, and the SSQ items on factor 2 with loadings > 0.63. A two dimensional summary appears sufficient and clinically meaningful. Discussion and Conclusions Among specialist addiction service users, social satisfaction appears to be a unique construct of addiction and is not the same as variation due to psychological distress or dependence. Our interpretation of the findings is that dependence is best thought of as a specific psychological condition subsumed under the construct psychological distress. [Fairhurst C, Böhnke JR, Gabe R, Croudace TJ, Tober G, Raistrick D. Factor analysis of treatment outcomes from a UK specialist addiction service: Relationship between the L eeds D ependence Q uestionnaire, S ocial S atisfaction Q uestionnaire and 10‐ i tem C linical O utcomes in R outine E valuation. Drug Alcohol Rev 2014;33:643–650]