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Journal of Nervous & Mental Disease:
doi: 10.1097/NMD.0b013e318064e80e
Brief Report

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

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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.

© 2007 Lippincott Williams & Wilkins, Inc.

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