Craving predicts use during treatment for methamphetamine dependence: a prospective, repeated-measures, within-subject analysis

FRANÇAIS :
Le craving est défini généralement comme un besoin compulsif irrésistible de drogues. Les scores de "craving" sont étudiés chez 31 consommateurs d'amphétamines, bénéficiant d'une pharmacothérapie par la tyrosine. Les mesures répétées de ces scores montrent que le craving, bien qu'il ne soit ni nécessaire ni suffisant pour expliquer la consommation, est fortement prédicteur de l'usage subséquent d'amphétamines. Ceci peut aussi s'appliquer à d'autres produits addictifs.
ENGLISH:
Clinical lore dictates that craving drives the compulsive use of drugs and alcohol - the core feature of substance dependence. Yet limited research has yielded mixed results, suggesting that craving is neither necessary nor sufficient for continued use or relapse to addictive substances. To investigate the role of craving in compulsive methamphetamine use, 31 men and women in treatment for methamphetamine dependence were asked to indicate, once each week for 12 weeks, the severity of craving that they had experienced during the previous 24 h, using a 100-mm visual analog scale. In a prospective, repeated-measures, within-subject analysis, craving intensity significantly predicted methamphetamine use in the week immediately following each craving report. Craving remained a highly significant predictor in multivariate models controlling for pharmacological intervention, and for methamphetamine use during the prior week. Craving scores that preceded use were 2.7 times higher than scores that preceded abstinence. Risk of subsequent use was 2.5 times greater for scores in the upper half of the scale relative to scores in the lower half. The results obtained demonstrate that, while craving alone may be neither necessary nor sufficient to explain substance addiction, when measured prospectively in a carefully-designed study craving emerges as a salient predictive factor in continued methamphetamine use for patients in treatment for methamphetamine dependence. (Author's abstract.)