Historique
Périodique
Assessing the most powerful analysis method for school-based intervention studies with alcohol, tobacco, and other drug outcomes
(Evaluer l'efficacité des méthodes d'analyse utilisées dans le cadre des études sur les interventions en milieu scolaire visant des effets sur la consommation de tabac, alcool et autres drogues)
Auteur(s) :
JANEGA J. B. ;
MURRAY, D. M. ;
VARNELL S. P. ;
BLITSTEIN J. L. ;
BIRNBAUM, A. S. ;
LYTLE L. A.
Année
2004
Page(s) :
595-606
Langue(s) :
Anglais
Refs biblio. :
24
Domaine :
Plusieurs produits / Several products
Thésaurus mots-clés
MILIEU SCOLAIRE
;
INTERVENTION
;
EVALUATION
;
METHODE
;
EFFICACITE
;
CONSOMMATION
;
TABAC
;
ALCOOL
;
PRODUIT ILLICITE
Thésaurus géographique
ETATS-UNIS
Note générale :
Addictive Behaviors, 2004, 29, (3), 595-606
Note de contenu :
tabl.
Résumé :
ENGLISH :
This article compares four mixed-model analyses valid for group-randomized trials (GRTs) involving a nested cohort design with a single pretest and a single posttest, the most common design used in GRTs. This study makes estimates of intraclass correlations (ICCs) available to investigators planning GRTs with alcohol, tobacco, and other drug measures as the outcomes of interest. It also provides formulae demonstrating the potential benefits to the standard error of the intervention effect of both adjustments for fixed and time-varying covariates, as well as correlations over time. These estimates will allow other researchers using these variables to plan their studies by performing a priori power analyses for any of four common analytic options. (Editor's abstract.)
Affiliation :
Contractor Support to Division of HIV/AIDS Prevention, Epidemiology Branch, Centers for Disease Control and Prevention, 1600 Clifton Road, Mailstop E-45, Atlanta, GA. E-mail : d.murraymail.psyc.memphis.edu
Etats-Unis. United States.
Etats-Unis. United States.