Historique
Article de Périodique
Correlations between cannabis use and IQ change in the Dunedin cohort are consistent with confounding from socioeconomic status (2013)
Auteur(s) :
ROGEBERG, O.
Année
2013
Page(s) :
4251-4254
Langue(s) :
Anglais
Refs biblio. :
29
Domaine :
Drogues illicites / Illicit drugs
Discipline :
PSY (Psychopathologie / Psychopathology)
Thésaurus géographique
NOUVELLE ZELANDE
Thésaurus mots-clés
CANNABIS
;
INTELLIGENCE
;
COGNITION
;
COHORTE
;
PROFIL SOCIO-DEMOGRAPHIQUE
;
MODELE
Note générale :
Letters:
• Personality may explain the association between cannabis use and neuropsychological impairment. Daly M., p. E979.
• Reply to Rogeberg and Daly: No evidence that socioeconomic status or personality differences confound the association between cannabis use and IQ decline. Moffitt T.E., Meier M.H., Caspi A., Poulton R., p. E980-E982.
• Personality may explain the association between cannabis use and neuropsychological impairment. Daly M., p. E979.
• Reply to Rogeberg and Daly: No evidence that socioeconomic status or personality differences confound the association between cannabis use and IQ decline. Moffitt T.E., Meier M.H., Caspi A., Poulton R., p. E980-E982.
Résumé :
Does cannabis use have substantial and permanent effects on neuropsychological functioning? Renewed and intense attention to the issue has followed recent research on the Dunedin cohort, which found a positive association between, on the one hand, adolescent-onset cannabis use and dependence and, on the other hand, a decline in IQ from childhood to adulthood [Meier et al. (2012) Proc Natl Acad Sci USA 109(40):E2657-E2664]. The association is given a causal interpretation by the authors, but existing research suggests an alternative confounding model based on time-varying effects of socioeconomic status on IQ. A simulation of the confounding model reproduces the reported associations from the Dunedin cohort, suggesting that the causal effects estimated in Meier et al. are likely to be overestimates, and that the true effect could be zero. Further analyses of the Dunedin cohort are proposed to distinguish between the competing interpretations. Although it would be too strong to say that the results have been discredited, the methodology is flawed and the causal inference drawn from the results premature.
Affiliation :
The Ragnar Frisch Centre for Economic Research, Oslo, Norway