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The use of percentage change from baseline as an outcome in a controlled trial is statistically inefficient: a simulation study.
Vickers AJ
BMC Med Res Methodol 2001, 1:6
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Parametric versus non-parametric statistics in the analysis of randomized trials with non-normally distributed data
Vickers AJ
BMC Medical Research Methodology 2005, 5:35 (3 November 2005)
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How many repeated measures in repeated measures designs? Statistical issues for comparative trials
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BMC Medical Research Methodology 2003, 3:22 (27 October 2003)
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Improving question formulation for use in evidence appraisal in a tertiary care setting: a randomised controlled trial [ISRCTN66375463]
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BMC Medical Informatics and Decision Making 2001, 1:4 (8 November 2001)
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