title: Exploratory factor analysis and validation study of the lifetime severity index for cocaine, Spanish version (LSI-C-Spanish).
abstract: The purpose of the study was to do an exploratory factor analysis and to examine the criterion-related and discriminant validity of the Lifetime Severity Index for Cocaine (LSI-C), Spanish version. A sample of 171 outpatients from 10 drug centers in Spain participated in the study. We conducted the factor analysis with orthogonal rotation and examined correlations between the LSI-C total score and criterion variables as well as the score obtained by a quality of life measure. The factor analysis revealed 2 principal factors that explain 65.8% of the variance. Lower LSI-C scores were associated with taking medication, receiving social help, using cocaine fewer than 30 times during the previous 6 months, and with better scores on quality of life measures. Higher LSI-C scores were associated with unstable housing, overdose, hospitalization, cocaine consumption more than 100 times during the previous 6 months, and more years of drug consumption. The LSI-C Spanish version shows acceptable criterion-related and discriminant validity.
authors.affiliation: Instituto de Historia de la Ciencia y Documentación López Piñero (Universitat de Valencia-CSIC), Valencia, Spain.
authors.forename: Claudia C
authors.initials: CC
authors.lastname: Morales-Manrique
authors.forename: Juan C
authors.initials: JC
authors.lastname: Valderrama-Zurián
authors.forename: Miguel
authors.initials: M
authors.lastname: Castellano-Gómez
authors.forename: Rafael
authors.initials: R
authors.lastname: Aleixandre-Benavent
mesh_terms: D000293:Adolescent; D000328:Adult; D019970:Cocaine-Related Disorders / Q000175:diagnosis* / Q000453:epidemiology / Q000523:psychology; D062787:Drug Overdose; D005163:Factor Analysis, Statistical; D005260:Female; D006760:Hospitalization; D006801:Humans; D007802:Language; D008297:Male; D008875:Middle Aged; D011157:Population Dynamics; D011569:Psychiatric Status Rating Scales / Q000706:statistics & numerical data*; D011594:Psychometrics; D011788:Quality of Life; D015203:Reproducibility of Results; D012720:Severity of Illness Index; D013030:Spain / Q000453:epidemiology; D016320:Substance Abuse Treatment Centers