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Exploratory Factor Analysis and Validation Study of the Lifetime Severity Index for Cocaine, Spanish Version (LSI-C-Spanish)

Morales-Manrique, Claudia C.*; Valderrama-Zurián, Juan C. PhD, MD*; Castellano-Gómez, Miguel MD†; Aleixandre-Benavent, Rafael PhD, MD*; Cocaine C.V. Group

Journal of Nervous & Mental Disease: June 2007 - Volume 195 - Issue 6 - pp 532-536
doi: 10.1097/NMD.0b013e318064e80e
Brief Report

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.

From the *Instituto de Historia de la Ciencia y Documentación “López Piñero” (Universitat de Valencia-CSIC), Valencia, Spain; †Dirección General de Drogodependencias. Agencia Valenciana de Salud, Conselleria de Sanitat, Generalitat Valenciana, Valencia, Spain; ‡Unidades de Conductas Adictivas de la Comunidad Valenciana, Agencia Valenciana de Salud, Conselleria de Sanitat, Generalitat Valenciana, Valencia, Spain.

Supported by CSISP, Dirección General de Salud Pública, Consellería de Sanitat, Generalitat Valenciana.

Send reprint requests to: Juan Carlos Valderrama Zurián, Instituto de Historia de la Ciencia y Documentación López Piñero, Facultad de Medicina, Avda Blasco Ibáñez 15, CP: 46010, Valencia, Spain. E-mail: juan.valderrama@uv.es.

© 2007 Lippincott Williams & Wilkins, Inc.