... Disorders and Stroke, Bethesda, Md., USA Key Words. Epidemiology Analytic studies Case-control studies Berksonian bias Prospective studies Experimental studies Controlled clinical trials Abstract. Unlike the laboratory investigator, who is able to manipulate experimental conditions precisely...

... Epidemiologic methods Neurotrauma Prospective studies Spinal cord injuries 31 10 2007 © 1982 S. Karger AG, Basel 1982 Copyright / Drug Dosage / Disclaimer Copyright: All rights reserved. No part of this publication may be translated into other languages, reproduced or utilized in any form...

... study allow for the creation of a national cohort to address geographic and ethnic differences in stroke. 2 9 2005 Cerebrovascular disorders, epidemiology Cohort studies Epidemiologic methods African-Americans Risk factors Geography Southeastern United States Prospective studies...