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Journal Article ISSUES IN CARRYING OUT EPIDEMIOLOGIC RESEARCH IN THE ELDERLY Get access JENNIFER L. KELSEY, JENNIFER L. KELSEY 1Division of Epidemiology, Columbia University School of Public HealthNew York, NY Search for other works by this author on: Oxford Academic PubMed Google Scholar LINDA A. O'BRIEN, LINDA A. O'BRIEN 2Clinical Epidemiology Unit, Department of Medicine, University of Pennsylvania School of MedicinePhiladelphia, PA Search for other works by this author on: Oxford Academic PubMed Google Scholar JEANE ANN GRISSO, JEANE ANN GRISSO 2Clinical Epidemiology Unit, Department of Medicine, University of Pennsylvania School of MedicinePhiladelphia, PA Search for other works by this author on: Oxford Academic PubMed Google Scholar SUSIE HOFFMAN SUSIE HOFFMAN 1Division of Epidemiology, Columbia University School of Public HealthNew York, NY Search for other works by this author on: Oxford Academic PubMed Google Scholar American Journal of Epidemiology, Volume 130, Issue 5, November 1989, Pages 857–866, https://doi.org/10.1093/oxfordjournals.aje.a115418 Published: 01 November 1989 Article history Received: 04 November 1988 Revision received: 10 April 1989 Published: 01 November 1989
Kelsey et al. (Wed,) studied this question.