- Open Access
Erratum to: Sample size calculations for cluster randomised controlled trials with a fixed number of clusters
BMC Medical Research Methodologyvolume 17, Article number: 8 (2017)
The original article was published in BMC Medical Research Methodology 2011 11:102
After publication of the original article , it came to the authors’ attention that there was a typing error in equation 16. There should be a rho on the denominator of this equation.
The published version of equation 16 is:
The correct version of equation 16 is:
Hemming K, Girling AJ, Sitch AJ, Marsh J, Lilford RJ. Sample size calculations for cluster randomised controlled trials with a fixed number of clusters. BMC Med Res Methodol. 2011;11:102. doi:10.1186/1471-2288-11-102.
The online version of the original article can be found under doi:10.1186/1471-2288-11-102.