Journal article
Sample size calculations: should the emperor’s clothes be off the peg or made to measure?
Abstract
Ethics committees require estimates of sample size for all trials, but statistical calculations are no more accurate than estimates from historical data. Geoffrey Norman and colleagues propose some “one size fits all” numbers for different study designs
Authors
Norman G; Monteiro S; Salama S
Journal
The BMJ, Vol. 345, No. aug23 1,
Publisher
BMJ
Publication Date
August 23, 2012
DOI
10.1136/bmj.e5278
ISSN
0959-8138