Journal article

A comparison of longitudinal modelling approaches: Alcohol and cannabis use from adolescence to young adulthood

CJ Greenwood, GJ Youssef, KS Betts, P Letcher, J Mcintosh, E Spry, DM Hutchinson, JA Macdonald, LJ Hagg, A Sanson, JW Toumbourou, CA Olsson



BACKGROUND: Modelling trajectories of substance use over time is complex and requires judicious choices from a number of modelling approaches. In this study we examine the relative strengths and weakness of latent curve models (LCM), growth mixture modelling (GMM), and latent class growth analysis (LCGA). DESIGN: Data were drawn from the Australian Temperament Project, a 36-year-old community-based longitudinal study that has followed a sample of young Australians from infancy to adulthood across 16 waves of follow-up since 1983. Models were fitted on past month alcohol use (n = 1468) and cannabis use (n = 549) across six waves of data collected from age 13-14 to 27-28 years. FINDINGS: Of th..

View full abstract


Awarded by Australian Research Council

Awarded by National Health and Medical Research Council of Australia

Funding Acknowledgements

Data collection for the ATP study was supported primarily through Australian grants from the Melbourne Royal Children's Hospital Research Foundation, National Health and Medical Research Council, Australian Research Council, and the Australian Institute of Family Studies. Funding for this work was supported by grants from the Australian Research Council [DP130101459; DP160103160; DP180102447) and the National Health and Medical Research Council of Australia [APP1082406]. CJG was supported by a Deakin University PhD Scholarship.