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@article{Fiorentino:2021:10.1186/s13063-021-05509-w,
author = {Fiorentino, F},
doi = {10.1186/s13063-021-05509-w},
journal = {Trials},
pages = {1--12},
title = {Feasibility of Comparative Health Research Outcome of Novel Surgery in prostate cancer  (IP4-CHRONOS): statistical analysis plan for the randomised feasibility phase of the CHRONOS study.},
url = {http://dx.doi.org/10.1186/s13063-021-05509-w},
volume = {22},
year = {2021}
}

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TY  - JOUR
AB  - BackgroundRandomised controlled trials (RCTs) for surgical interventions have often proven difficult with calls for innovative approaches. The Imperial Prostate (IP4) Comparative Health Research Outcomes of Novel Surgery in prostate cancer (IP4-CHRONOS) study aims to deliver level 1 evidence on outcomes following focal therapy which involves treating just the tumour rather than whole-gland surgery or radiotherapy. Our aim is to test the feasibility of two parallel RCTs within an overarching strategy that fits with existing patient and physician equipoise and maximises the chances of success and potential benefit to patients and healthcare services.Methods and designIP4-CHRONOS is a randomised, unblinded multi-centre study, including two parallel randomised controlled trials targeting the same patient population: IP4-CHRONOS-A and IP4-CHRONOS-B.IP4-CHRONOS-A is a 1:1 RCT and the other is a multi-arm, multi-stage (MAMS) RCT starting with three arms and a 1:1:1 randomisation. The two linked RCTs are discussed with patients at the time of consent and the choice of A or B is dependent on physician and patient equipoise. The primary outcome is the feasibility of recruitment, acceptance of randomisation and compliance to allocated arm.ResultsThis paper describes the statistical analysis plan (SAP) for the feasibility study within IP4-CHRONOS given its innovative approach. Version 1.0 of the SAP has been reviewed by the Trial Steering Committee (TSC), Chief Investigator (CI), Senior Statistician and Trial Statistician and signed off. The study is ongoing and recruiting. Recruitment is scheduled to finish later in 2021. The SAP documents approved methods and analyses that will be conducted. Since this is written in advance of the analysis, we avoid bias arising from prior knowledge of the study data and findings.DiscussionOur feasibility analysis will demonstrate if IP4-CHRONOS is feasible in terms of recruitment, randomisation and compliance, and whether to continue both A
AU  - Fiorentino,F
DO  - 10.1186/s13063-021-05509-w
EP  - 12
PY  - 2021///
SN  - 1745-6215
SP  - 1
TI  - Feasibility of Comparative Health Research Outcome of Novel Surgery in prostate cancer  (IP4-CHRONOS): statistical analysis plan for the randomised feasibility phase of the CHRONOS study.
T2  - Trials
UR  - http://dx.doi.org/10.1186/s13063-021-05509-w
UR  - https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-021-05509-w
VL  - 22
ER  -

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