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Changing BMI scores among Canadian Indigenous and non-Indigenous children, youth, and young adults: Untangling age, period, and cohort effects

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The objective of this study was to examine age, period and cohort effects on BMI among Indigenous and non-Indigenous populations, using repeated cross-sectional survey data from the CCHS (2001 to… Click to show full abstract

The objective of this study was to examine age, period and cohort effects on BMI among Indigenous and non-Indigenous populations, using repeated cross-sectional survey data from the CCHS (2001 to 2014). Cross-classified random-effect two-level models were used to estimate fixed effects for age and its quadratic term (Level 1), and also to estimate random effects for time periods and birth cohorts (Level 2), while controlling for the effects of Level 1 control variables: sex, model of interview and response by proxy. Overall, the results support the hypothesis that age and period effects are primarily responsible for the current obesity epidemic. L’objectif de cette etude etait d’examiner les effets de l’âge, de la periode et de la cohorte sur l’IMC chez les populations autochtones et non autochtones, en utilisant des donnees d’enquetes transversales repetees de l’ESCC (2001 a 2014). On a utilise des modeles a deux niveaux a effets aleatoires croises pour estimer les effets fixes pour l’âge et son terme quadratique (niveau 1), et egalement estimer les effets aleatoires pour les periodes et les cohortes de naissance (niveau 2), tout en controlant les effets du niveau 1 Variables de controle: sexe, modele d’interview et reponse par procuration. Dans l’ensemble, les resultats confirment l’hypothese selon laquelle les effets de l’âge et de la periode sont les principaux responsables de l’epidemie actuelle d’obesite.

Keywords: cohort effects; age; les effets; age period; period cohort

Journal Title: Canadian Studies in Population
Year Published: 2017

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