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Mendeley readers
Title |
Sample size calculations for stepped wedge trials using design effects are only approximate in some circumstances
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Published in |
Trials, May 2016
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DOI | 10.1186/s13063-016-1359-4 |
Pubmed ID | |
Authors |
Karla Hemming |
Abstract |
Estimation of sample size and power for stepped wedge cluster randomised trials can be determined by one of a number of related methods. These include exact analytical approaches, design effects or simulation. A recent paper compared the design effect to the analytical method. There were some differences between the two approaches. We show here that these differences occur because the design effect approach is only technically correct when there is an equal number of clusters crossing over at each step. The design effect for the stepped wedge cluster randomised trial is only appropriate when there is an equal number of clusters switching at each step. |
X Demographics
The data shown below were collected from the profile of 1 X user who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
Country | Count | As % |
---|---|---|
Unknown | 1 | 100% |
Demographic breakdown
Type | Count | As % |
---|---|---|
Members of the public | 1 | 100% |
Mendeley readers
The data shown below were compiled from readership statistics for 12 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
Country | Count | As % |
---|---|---|
Unknown | 12 | 100% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Researcher | 4 | 33% |
Student > Ph. D. Student | 3 | 25% |
Student > Postgraduate | 2 | 17% |
Professor > Associate Professor | 1 | 8% |
Lecturer | 1 | 8% |
Other | 0 | 0% |
Unknown | 1 | 8% |
Readers by discipline | Count | As % |
---|---|---|
Mathematics | 2 | 17% |
Nursing and Health Professions | 2 | 17% |
Social Sciences | 2 | 17% |
Agricultural and Biological Sciences | 1 | 8% |
Biochemistry, Genetics and Molecular Biology | 1 | 8% |
Other | 2 | 17% |
Unknown | 2 | 17% |