Open Access

Erratum to: Evaluating the PRASE patient safety intervention - a multi-centre, cluster trial with a qualitative process evaluation: study protocol for a randomised controlled trial

  • Laura Sheard1, 2Email author,
  • Jane O’Hara1,
  • Gerry Armitage1, 3,
  • John Wright1,
  • Kim Cocks4,
  • Rosemary McEachan5,
  • Ian Watt4 and
  • Rebecca Lawton1, 6
Trials201617:605

https://doi.org/10.1186/s13063-016-1655-z

Received: 4 October 2016

Accepted: 12 October 2016

Published: 20 December 2016

The original article was published in Trials 2014 15:2282

Erratum

Unfortunately, the original version of this article [1] contained an error. There was an error in the methods section. It has been corrected below:

Published paragraph

Estimate of sample size

The study will be powered to detect a small to medium difference (effect size = 0.3) between the intervention and control groups with respect to the Patient Safety Thermometer score (See Outcome Measures for explanation of this score). A small to medium effect size seems a reasonable assumption as each ward will be focussing on developing and implementing their own action plans, tailored using their initial feedback. The intervention is therefore specific to individual wards and may not impact on all areas measured by the Patient Safety Thermometer. In order to achieve 80 % power (with alpha = 0.05) with an average cluster size of 25 patients and assumed ICC of 0.05, 32 wards will be required (16 per arm). This estimate of ICC seems reasonable for a trial in secondary care with a patient reported outcome [39].

Amended paragraph

Estimate of sample size

The study will be powered to detect a small to medium difference (effect size = 0.3) between the intervention and control groups with respect to the PMOS score. A small to medium effect size seems a reasonable assumption as each ward will be focussing on developing and implementing their own action plans, tailored using their initial feedback. The intervention is therefore specific to individual wards and may not impact on all areas measured by the PMOS. In order to achieve 80 % power (with alpha = 0.05) with an average cluster size of 25 patients and assumed ICC of 0.05, 32 wards will be required (16 per arm). This estimate of ICC seems reasonable for a trial in secondary care with a patient reported outcome [39].

Notes

Declarations

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

Authors’ Affiliations

(1)
Yorkshire Quality & Safety Research Group, Bradford Institute for Health Research, Bradford Royal Infirmary
(2)
the Yorkshire Quality & Safety Research Group
(3)
School of Health Studies, University of Bradford
(4)
York Trials Unit, Department of Health Sciences, University of York
(5)
Bradford Institute for Health Research, Bradford Royal Infirmary
(6)
Institute of Psychological Sciences, Faculty of Medicine & Health, University of Leeds

Reference

  1. Sheard L, O’Hara J, Armitage G, Wright J, Cocks K, McEachan R, Watt I, Lawton R. Evaluating the PRASE patient safety intervention - a multi-centre, cluster trial with a qualitative process evaluation: study protocol for a randomised controlled trial. Trials. 2014;15:420.View ArticlePubMedPubMed CentralGoogle Scholar

Copyright

© The Author(s). 2016

Advertisement