Research Methods & Reporting
How to design efficient cluster randomised trials
BMJ 2017; 358 doi: https://doi.org/10.1136/bmj.j3064 (Published 14 July 2017) Cite this as: BMJ 2017;358:j3064
Data supplement
Web extra
- Data Supplement - Appendices 1-3: Appendix 1â€"Formula and notation; Appendix 2â€"Illustration of how to construct power and precision curves; Appendix 3â€"Derivation of a simple rule to determine if a minimal increase in the number of clusters can lead to a significant reduction in cluster size.
- Data Supplement - Supplementary figures: Power and precision curves for case study for ICCs of 0.01 and 0.05
Web extra
- Data Supplement - Appendices 1-3: Appendix 1â€"Formula and notation; Appendix 2â€"Illustration of how to construct power and precision curves; Appendix 3â€"Derivation of a simple rule to determine if a minimal increase in the number of clusters can lead to a significant reduction in cluster size.
- Data Supplement - Supplementary figures: Power and precision curves for case study for ICCs of 0.01 and 0.05
See more
- Covid-19: Norway investigates 23 deaths in frail elderly patients after vaccinationBMJ January 15, 2021, 372 n149; DOI: https://doi.org/10.1136/bmj.n149
- Covid-19: Government uses lateral flow tests to keep children in schools against regulator’s adviceBMJ January 15, 2021, 372 n148; DOI: https://doi.org/10.1136/bmj.n148
- Covid-19: Doctors’ leaders call for revised PPE guidance to reflect new variantsBMJ January 15, 2021, 372 n146; DOI: https://doi.org/10.1136/bmj.n146
- Stanley Henry CurryBMJ January 15, 2021, 372 n112; DOI: https://doi.org/10.1136/bmj.n112
- Agnes (“Nan”) BlairBMJ January 15, 2021, 372 n110; DOI: https://doi.org/10.1136/bmj.n110
Cited by...
- Protocol of a natural experiment to evaluate a supermarket intervention to improve food purchasing and dietary behaviours of women (WRAPPED study) in England: a prospective matched controlled cluster design
- Implementation of the Symptom Navi (C) Programme for cancer patients in the Swiss outpatient setting: a study protocol for a cluster randomised pilot study (Symptom Navi(C) Pilot Study)
- PARROT Ireland: Placental growth factor in Assessment of women with suspected pre-eclampsia to reduce maternal morbidity: a Stepped Wedge Cluster Randomised Control Trial Research Study Protocol
- Ethical implications of excessive cluster sizes in cluster randomised trials