Journal article
Influence of population versus convenience sampling on sample characteristics in studies of cognitive aging
H Brodaty, A Mothakunnel, M de Vel-Palumbo, D Ames, KA Ellis, S Reppermund, NA Kochan, G Savage, JN Trollor, J Crawford, PS Sachdev
Annals of Epidemiology | Published : 2014
Abstract
Purpose: We examined whether differences in findings of studies examining mild cognitive impairment (MCI) were associated with recruitment methods by comparing sample characteristics in two contemporaneous Australian studies, using population-based and convenience sampling. Method: The Sydney Memory and Aging Study invited participants randomly from the electoral roll in defined geographic areas in Sydney. The Australian Imaging, Biomarkers and Lifestyle Study of Ageing recruited cognitively normal (CN) individuals via media appeals and MCI participants via referrals from clinicians in Melbourne and Perth. Demographic and cognitive variables were harmonized, and similar diagnostic criteria w..
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Awarded by Science and Industry Endowment Fund
Funding Acknowledgements
The authors thank all participants and their informants for their enthusiastic support. The authors also thank Kristan Kang, Joanne Robertson, Lance Macaulay, and the MAS and AIBL study research teams. This study was supported by Commonwealth Scientific and Industrial Research Organisation under the Preventative Health Flagship. The MAS is supported through National Health and Medical Research Council Program grant (ID 568969). The AIBL study receives support from the Science Industry Endowment Fund. A complete account of AIBL study funding is available at www.aibl.csiro.au.