Document Detail


Validity of the Severity of Dependence Scale (SDS) construct applying the item response theory to a non-clinical sample of heroin users.
MedLine Citation:
PMID:  18570025     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
AIMS: The purpose of this work is to study the validity of the Severity of Dependence Scale (SDS) construct by applying Rasch models to a non-clinical sample of heroin abusers. SUBJECTS: 982 (73% men) young people 30 years old or under (mean age 25.9 years) participated. All of them were captured from the community in the metropolitan areas of Madrid, Barcelona and Seville, between April 2002 and December 2003. ANALYSIS: Dimensionality of the scale and calibration of items were studied using the Rating Scale model, which is a Rasch-type model. A factorial analysis was also performed to check the dimensionality of the scale. RESULTS: The analysis of fit shows that all the items have infit and outfit values between +/- 2 logits, indicating that the data fit the model and that it may be assumed to be unidimensional. The principal components analysis also showed the existence of a principal factor that explains 52.5% of the variance observed. Item calibration found that they are between +0.89 and -1.04 logits on the scale. CONCLUSION: The results show unidimensional structure of the SDS scale. Item calibration shows they are distributed along the continuum, which must be taken into account when calculating total scores. The study's limitations are noted.
Authors:
Francisco Gonzalez-Saiz; Oscar M Lozano; Rosario Ballesta; Teresa Silva; Maria Teresa Brugal; Izaskun Bilbao; Gregorio Barrio; Antonia Domingo-Salvany; Maria Jose Bravo; Luis De la Fuente; Grupo Del Proyecto Itinere
Related Documents :
11144585 - Interrelations among distortion-product phase-gradient delays: their connection to scal...
15524535 - Characterizing the microscopic physics near moving contact lines using dynamic contact ...
20543875 - An evaluation of the precision of measurement of ryff's psychological well-being scales...
15224455 - Evaluation of the mississippi ptsd scale--revised using rasch measurement.
15626935 - Comparison of the predictive validity of diagnosis-based risk adjusters for clinical ou...
1418275 - Information, discrimination and divergence in cytology. vi. biases and errors of measur...
Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Substance use & misuse     Volume:  43     ISSN:  1082-6084     ISO Abbreviation:  Subst Use Misuse     Publication Date:  2008  
Date Detail:
Created Date:  2008-06-23     Completed Date:  2008-08-22     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9602153     Medline TA:  Subst Use Misuse     Country:  United States    
Other Details:
Languages:  eng     Pagination:  919-35     Citation Subset:  IM    
Affiliation:
Fundacion Andaluza para la Atencion a las Drogodependencias, Sevilla, Spain. pacogonzalez@comcadiz.com
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Adult
Data Collection / statistics & numerical data
Factor Analysis, Statistical
Female
Heroin Dependence / diagnosis*,  epidemiology,  psychology
Humans
Male
Models, Statistical
Principal Component Analysis
Probability
Psychiatric Status Rating Scales / statistics & numerical data*
Psychometrics
Reproducibility of Results
Severity of Illness Index
Spain / epidemiology

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Civic norms and etiquettes regarding marijuana use in public settings in New York City.
Next Document:  Variation in family structure among urban adolescents and its effects on drug use.