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Planning a randomized clinical trial in dyspepsia: Do we have a valid outcome measure?

โœ Scribed by L. Rabeneck; K.F. Cook; N.P. Wray


Book ID
118520755
Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
171 KB
Volume
114
Category
Article
ISSN
0016-5085

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Planning group sizes in clinical trials
โœ Hubert J. A. Schouten ๐Ÿ“‚ Article ๐Ÿ“… 1999 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 119 KB ๐Ÿ‘ 2 views

Simple formulae have been derived for the accurate computation of sample sizes when the two-sample t-test is used. Required sample sizes may be reduced by taking repeated measures, especially if correlations are about equal. In a trial with two parallel groups, repeated measures may be summarized by