Calculation of sample size for stroke trials assessing functional outcome: comparison of binary and ordinal approaches
Background Many acute stroke trials have given neutral results. Sub-optimal statistical analyses may be failing to detect efficacy. Methods which take account of the ordinal nature of functional outcome data are more efficient. We compare sample size calculations for dichotomous and ordinal out...
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| Format: | Article |
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Blackwell Publishing
2008
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| Online Access: | https://eprints.nottingham.ac.uk/889/ |