Research Topics
| Adrian V HernandezSummaryAffiliation: Erasmus MC Country: The Netherlands Publications
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Detail Information
Publications
Covariate adjustment in randomized controlled trials with dichotomous outcomes increases statistical power and reduces sample size requirementsAdrian V Hernandez
Center for Clinical Decision Sciences, Department of Public Health, Erasmus Medical Center, P O Box 1738, Rotterdam 3000 DR, The Netherlands
J Clin Epidemiol 57:454-60. 2004..We studied type I error, power, and potential reduction in sample size with several covariate adjustment strategies...
Randomized controlled trials with time-to-event outcomes: how much does prespecified covariate adjustment increase power?Adrian V Hernandez
Center for Clinical Decision Sciences, Department of Public Health, Erasmus University Medical Center, Rotterdam, The Netherlands
Ann Epidemiol 16:41-8. 2006..We evaluated the effects of various strategies of covariate adjustment on type I error, power, and potential reduction in sample size in randomized controlled trials (RCTs) with time-to-event outcomes...
Subgroup analysis and covariate adjustment in randomized clinical trials of traumatic brain injury: a systematic reviewAdrian V Hernandez
Center for Clinical Decision Sciences, Department of Public Health Erasmus MC University Medical Center Rotterdam, Rotterdam, The Netherlands
Neurosurgery 57:1244-53; discussion 1244-53. 2005..We critically reviewed the use of two types of secondary analyses, covariate adjustment and subgroup analysis, which are common in TBI trials...
Subgroup analyses in therapeutic cardiovascular clinical trials: are most of them misleading?Adrian V Hernandez
Center for Clinical Decision Sciences, Department of Public Health, Thoraxcenter, Erasmus University Medical Center, Rotterdam, The Netherlands
Am Heart J 151:257-64. 2006..Treatment decisions in clinical cardiology are directed by results from randomized clinical trials (RCTs). We studied the appropriateness of the use and interpretation of subgroup analysis in current therapeutic cardiovascular RCTs...
Adjustment for strong predictors of outcome in traumatic brain injury trials: 25% reduction in sample size requirements in the IMPACT studyAdrian V Hernandez
Department of Public Health, Erasmus MC University Medical Center Rotterdam, Rotterdam, The Netherlands
J Neurotrauma 23:1295-303. 2006..A major reduction in sample size can be obtained with covariate adjustment in TBI trials. Covariate adjustment for strong predictors should be incorporated in the analysis of future TBI trials...
A systematic review finds methodological improvements necessary for prognostic models in determining traumatic brain injury outcomesNino A Mushkudiani
Center for Medical Decision Making, Department of Public Health, Erasmus MC, P O Box 2040, 3000 CA Rotterdam, The Netherlands
J Clin Epidemiol 61:331-43. 2008..To describe the modeling techniques used for early prediction of outcome in traumatic brain injury (TBI) and to identify aspects for potential improvements...
