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Breast screening atypia and subsequent development of cancer : protocol for an observational analysis of the Sloane database in England (Sloane atypia cohort study)
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Jenkinson, David J., Freeman, Karoline, Clements, Karen, Hilton, Bridget, Dulson-Cox, Joanne, Kearins, Olive, Stallard, Nigel, Wallis, Matthew G., Sharma, Nisha, Kirwan, Cliona, Pinder, Sarah, Provenzano, Elena, Shaaban, Abeer M., Stobart, Hilary, McDonnell, Samantha J., Thompson, Alastair M. and Taylor-Phillips, Sian (2022) Breast screening atypia and subsequent development of cancer : protocol for an observational analysis of the Sloane database in England (Sloane atypia cohort study). BMJ Open, 12 (1). e058050. doi:10.1136/bmjopen-2021-058050 ISSN 2044-6055.
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Official URL: https://doi.org/10.1136/bmjopen-2021-058050
Abstract
Introduction: The National Health Service (NHS) Breast Screening Programme aims to detect cancer earlier when treatment is more effective but can harm women by over diagnosing and overtreating cancers which would never have become symptomatic. As well as breast cancer, a spectrum of atypical epithelial proliferations (atypia) can also be detected as part of screening. This spectrum of changes, while not cancer, may mean that a woman is more likely to develop breast cancer in the future. Follow-up of atypia is not evidence based. We currently do not know which atypia should be detected to avoid future cancer. This study will explore how atypia develops into breast cancer in terms of number of women, time of cancer development, cancer type and severity, and whether this varies for different types of atypia.
Methods and analysis: The Sloane cohort study began in April 2003 with ongoing data collection including atypia diagnosed through screening at screening units in the UK. The database for England has 3645 cases (24 September 2020) of epithelial atypia, with follow-up from 1 to 15 years. The outcomes include subsequent invasive breast cancer and the nature of subsequent cancer. Descriptive statistics will be produced. The observed rates of breast cancer at 1, 3 and 6 years for types of atypia will be reported with CIs, to enable comparison to women in the general population. Time to event methods will be used to describe the time to breast cancer diagnosis for the types of atypia, including flexible parametric modelling if appropriate. Patient representatives from Independent Cancer Patients’ Voice are included at every stage of the research.
Ethics and dissemination: The study has received research ethics approval from the University of Warwick Biomedical and Scientific Research Ethics Committee (BSREC 10/20–21, 8 October 2020), Public Health England office for data release approvals (ODR1718_313) and approval from the English Breast Research Advisory Committee (BSPRAC_031). The findings will be disseminated to breast screening clinicians (via journal publication and conference presentation), to the NHS Breast Screening Programme to update their guidelines on how women with atypia should be followed up, and to the general public.
| Item Type: | Journal Article | ||||||
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| Subjects: | R Medicine > RC Internal medicine > RC0254 Neoplasms. Tumors. Oncology (including Cancer) | ||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Medicine > Warwick Medical School | ||||||
| SWORD Depositor: | Library Publications Router | ||||||
| Library of Congress Subject Headings (LCSH): | Breast -- Cancer -- Risk factors, Breast -- Cancer -- Diagnosis, Tumor markers | ||||||
| Journal or Publication Title: | BMJ Open | ||||||
| Publisher: | BMJ Publishing Group | ||||||
| ISSN: | 2044-6055 | ||||||
| Official Date: | 7 January 2022 | ||||||
| Dates: |
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| Volume: | 12 | ||||||
| Number: | 1 | ||||||
| Article Number: | e058050 | ||||||
| DOI: | 10.1136/bmjopen-2021-058050 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| Reuse Statement (publisher, data, author rights): | ** Embargo end date: 06-01-2022 ** From BMJ via Jisc Publications Router ** History: received 06-10-2021; accepted 09-11-2021; ppub 01-2022; epub 06-01-2022. ** Licence for this article starting on 06-01-2022: https://creativecommons.org/licenses/by/4.0/ | ||||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||||
| Date of first compliant deposit: | 22 February 2022 | ||||||
| Date of first compliant Open Access: | 22 February 2022 | ||||||
| RIOXX Funder/Project Grant: |
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