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Conroy EJ, Cooper R, Shaw W, Persson C, Willadsen E, Munro KJ, Williamson PR, Semb G, Walsh T, Gamble C. A randomised controlled trial comparing palate surgery at 6 months versus 12 months of age (the TOPS trial): a statistical analysis plan. Trials 2021; 22:5. [PMID: 33397459 PMCID: PMC7780678 DOI: 10.1186/s13063-020-04886-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Accepted: 11/11/2020] [Indexed: 11/10/2022] Open
Abstract
Background Cleft palate is among the most common birth abnormalities. The success of primary surgery in the early months of life is crucial for successful feeding, hearing, dental development, and facial growth. Over recent decades, age at palatal surgery in infancy has reduced. The Timing Of Primary Surgery for cleft palate (TOPS) trial aims to determine whether, in infants with cleft palate, it is better to perform primary surgery at age 6 or 12 months (corrected for gestational age). Methods/design The TOPS trial is an international, two-arm, parallel group, randomised controlled trial. The primary outcome is insufficient velopharyngeal function at 5 years of age. Secondary outcomes, measured at 12 months, 3 years, and 5 years of age, include measures of speech development, safety of the procedure, hearing level, middle ear function, dentofacial development, and growth. The analysis approaches for primary and secondary outcomes are described here, as are the descriptive statistics which will be reported. The TOPS protocol has been published previously. Discussion This paper provides details of the planned statistical analyses for the TOPS trial and will reduce the risk of outcome reporting bias and data-driven results. Trial registration ClinicalTrials.gov NCT00993551. Registered on 9 October 2009. Supplementary Information The online version contains supplementary material available at 10.1186/s13063-020-04886-y.
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Affiliation(s)
- Elizabeth J Conroy
- Liverpool Clinical Trials Centre, University of Liverpool, a member of Liverpool Health Partners, Institute of Child Health, Alder Hey Children's NHS Foundation Trust, Liverpool, L12 2AP, UK.
| | - Rachael Cooper
- Liverpool Clinical Trials Centre, University of Liverpool, a member of Liverpool Health Partners, Institute of Child Health, Alder Hey Children's NHS Foundation Trust, Liverpool, L12 2AP, UK
| | - William Shaw
- School of Medical Sciences, Division of Dentistry, The University of Manchester, Manchester, UK
| | - Christina Persson
- School of Medical Sciences, Division of Dentistry, The University of Manchester, Manchester, UK.,Institute of Neuroscience and Physiology, Speech and Language Pathology Unit, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Elisabeth Willadsen
- School of Medical Sciences, Division of Dentistry, The University of Manchester, Manchester, UK.,Department of Nordic Studies and Linguistics, University of Copenhagen, Copenhagen, Denmark
| | - Kevin J Munro
- Manchester Centre for Audiology and Deafness, School of Health Sciences, The University of Manchester, Manchester, UK.,Manchester University Hospitals NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK
| | - Paula R Williamson
- Liverpool Clinical Trials Centre, University of Liverpool, a member of Liverpool Health Partners, Institute of Child Health, Alder Hey Children's NHS Foundation Trust, Liverpool, L12 2AP, UK
| | - Gunvor Semb
- School of Medical Sciences, Division of Dentistry, The University of Manchester, Manchester, UK
| | - Tanya Walsh
- School of Medical Sciences, Division of Dentistry, The University of Manchester, Manchester, UK
| | - Carrol Gamble
- Liverpool Clinical Trials Centre, University of Liverpool, a member of Liverpool Health Partners, Institute of Child Health, Alder Hey Children's NHS Foundation Trust, Liverpool, L12 2AP, UK
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