Search Results - subject:"detectable difference"

A menu-driven facility for power and detectable-difference calculations in stepped-wedge cluster-randomized trials

Hemming, Karla; Girling, Alan - In: Stata Journal 14 (2014) 2, pp. 363-380

This article introduces the Stata menu-driven program steppedwedge, which calculates detectable differences and power for stepped-wedge randomized trials. The command permits continuous, binary, and rate outcomes (with normal approximations) for comparisons using two-sided tests. The command...

Persistent link: https://www.econbiz.de/10010801214

A menu-driven facility for sample-size calculations in cluster randomized controlled trials

Hemming, Karla; Marsh, Jen - In: Stata Journal 13 (2013) 1, pp. 114-135

, clustersampsi will return the minimum number of clusters required under the prespecified design along with the minimum detectable … difference and maximum achievable power (both for the prespecified number of clusters). Cluster heterogeneity can be …

Persistent link: https://www.econbiz.de/10010633312

Generalized power calculations for generalized linear models and more

Newson, Roger - In: Stata Journal 4 (2004) 4, pp. 379-401

. These quantities are power, significance level, detectable difference, sample number, and the standard deviation (SD) of the … influence function when the detectable difference is a linear combination of link functions of subpopulation means for an …

Persistent link: https://www.econbiz.de/10005583271