Erratum: Persistent physical symptoms reduction intervention: A system change and evaluation in secondary care (PRINCE secondary) - A CBT-based transdiagnostic approach: Study protocol for a randomised controlled trial (BMC Psychiatry (2019) 19 (307) DOI: 10.1186/s12888-019-2297-y)

Abstract

Following publication of the original article [1], the authors identified a typographical error in the proposed sample size section. The correct sentence is given below. ‘The sample size calculation (Stata command sampsi) suggests that 161 patients per arm (322 in total) are needed to detect this effect size or a larger one with 90.14% power llowing for a deflation for including baseline measures in the analysis model (factor 0.84 assuming a correlation between baseline and 52 weeks WSAS of 0.4) and an attrition rate of 25%’.