Sample size calculations for stepped wedge trials using design effects are only approximate in some circumstances

Trials

Volumn 17, Issue 1, 2016, Pages

  Hemming, Karla ^a  

^a UNIVERSITY OF BIRMINGHAM   (United Kingdom)

Author keywords

[No Author keywords available]

Indexed keywords

CALCULATION; CONTROLLED CLINICAL TRIAL; CROSSING OVER; HUMAN; RANDOMIZED CONTROLLED TRIAL; SAMPLE SIZE; METHODOLOGY;

HUMANS; RESEARCH DESIGN; SAMPLE SIZE;

EID: 84965081913     PISSN: None     EISSN: 17456215     Source Type: Journal    
DOI: 10.1186/s13063-016-1359-4     Document Type: Letter

References (3)

1. Baio G, Copas A, Ambler G, Hargreaves J, Beard E, Omar RZ. Sample size calculation for a stepped wedge trial. Trials. 2015;16:354. doi: 10.1186/s13063-015-0840-9.
2. Hussey MA, Hughes JP. Design and analysis of stepped wedge cluster randomized trials. Contemp Clin Trials. 2007;28(2):182-91.
3. Woertman W, de Hoop E, Moerbeek M, Zuidema SU, Gerritsen DL, Teerenstra S. Stepped wedge designs could reduce the required sample size in cluster randomized trials. J Clin Epidemiol. 2013;66(7):752-8. doi: 10.1016/j.jclinepi.2013.01.009.