title: Re-examining threats to the reliability and validity of putative brain-behavior relationships: new guidelines for assessing the effect of patients lost to follow-up.
abstract: It often happens in behavioral and biomedical research that subjects in prospective, multiple assessment investigations, including clinical trials, are lost to follow-up evaluations. The purpose of this report is to outline a model that will enable the investigators to determine the extent to which results based upon the maintained cohort can be generalized to the attrited cohort, or those subjects lost to follow-up. While our proposed model derives from a specific application pertaining to changes in personality and affect behaviors following left and right hemisphere stroke, it should apply, with appropriate study-specific modifications, to a wide range of follow-up research designs in neuropsychology, behavioral science more generally, and other areas of biomedical research.
authors.affiliation: West Haven VA Medical Center, CT 06516.
authors.forename: D V
authors.initials: DV
authors.lastname: Cicchetti
authors.forename: L D
authors.initials: LD
authors.lastname: Nelson
mesh_terms: D015982:Bias; D001714:Bipolar Disorder / Q000503:physiopathology / Q000523:psychology / Q000534:rehabilitation; D001925:Brain Damage, Chronic / Q000503:physiopathology / Q000523:psychology / Q000534:rehabilitation; D002561:Cerebrovascular Disorders / Q000503:physiopathology / Q000523:psychology / Q000534:rehabilitation*; D002986:Clinical Trials as Topic / Q000706:statistics & numerical data*; D015331:Cohort Studies; D003866:Depressive Disorder / Q000503:physiopathology / Q000523:psychology / Q000534:rehabilitation; D004292:Dominance, Cerebral / Q000502:physiology; D005500:Follow-Up Studies; D006801:Humans; D015233:Models, Statistical; D019965:Neurocognitive Disorders / Q000503:physiopathology / Q000523:psychology / Q000534:rehabilitation; D009483:Neuropsychological Tests / Q000706:statistics & numerical data*; D010352:Patient Dropouts / Q000706:statistics & numerical data*; D010552:Personality Assessment / Q000706:statistics & numerical data; D015203:Reproducibility of Results