4.4 Article

The Melanoma Genomics Managing Your Risk Study randomised controlled trial: statistical analysis plan

Journal

TRIALS
Volume 21, Issue 1, Pages -

Publisher

BMC
DOI: 10.1186/s13063-020-04351-w

Keywords

Melanoma; Genomic risk; Behaviours; Prevention; Early detection; Randomised controlled trial; Sun exposure; Sun protection; Psycho-oncology; Bioethics

Funding

  1. National Health and Medical Research Council of Australia (NHMRC) [1129822]
  2. NHMRC [1147843]
  3. Research Training Program (RTP) Stipend Scholarship from the University of Sydney
  4. Merit Top Up Scholarship from the University of Sydney
  5. Melanoma Institute Australia Postgraduate Research Scholarship
  6. National Health and Medical Research Council of Australia [1129822, 1147843] Funding Source: NHMRC

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Background: The Melanoma Genomics Managing Your Risk Study is a randomised controlled trial that aims to evaluate the efficacy of providing information on personal genomic risk of melanoma in reducing ultraviolet radiation (UV) exposure, stratified by traditional risk group (low or high phenotypic risk) in the general population. The primary outcome is objectively measured total daily Standard Erythemal Doses at 12 months. Secondary outcomes include UV exposure at specific time periods, self-reported sun protection and skin-examination behaviours, psychosocial outcomes, and ethical considerations surrounding offering genomic testing at a population level. A within-trial and modelled economic evaluation will be undertaken from an Australian health system perspective to assess the cost-effectiveness of the intervention. Objective: To publish the pre-determined statistical analysis plan (SAP) before database lock and the start of andlysis. Methods: This SAP describes the data synthesis, analysis principles and statistical procedures for analysing the outcomes from this trial. The SAP was approved after closure of recruitment and before completion of patient follow-up. It outlines the planned primary analyses and a range of subgroup and sensitivity analyses. Health economic outcomes are not included in this plan but will be analysed separately. The SAP will be adhered to for the final data analysis of this trial to avoid potential analysis bias that may arise from knowledge of the outcome data. Results: This SAP is consistent with best practice and should enable transparent reporting. Conclusion: This SAP has been developed for the Melanoma Genomics Managing Your Risk Study and will be followed to ensure high-quality standards of internal validity and to minimise analysis bias.

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