Evidence mapPaperPMID 42580839Full record

ArticleBMJ open2026

Supporting adherence to adjuvant CDK4/6 inhibitors in women with early breast cancer (SWEET-PLUS): protocol for a multicentre UK study using qualitative and co-development methods.

Pearlin Teow, Lucy McGeagh, Henry Cain, Adam Todd, Farah Rehman, Jo Brett, Nicky Levitt, Mark Turner, Sarah-Jane F Stewart, Emma Hunt and 3 more

Abstract readClinical Trial Protocol
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In one paragraph

Article in BMJ open, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it
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0citing papers in PubMed
field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

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PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

13 authors.

Pearlin TeowPopulation Health Sciences Institute, Newcastle University, Newcastle upon Tyne, UK.ORCID 0009-0001-9552-4995
Lucy McGeaghOxford Institute of Applied Health Research, Oxford Brookes University, Oxford, UK.ORCID 0000-0002-9226-5115
Henry CainNewcastle Upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK.
Adam ToddSchool of Pharmacy, Newcastle University, Newcastle upon Tyne, UK.ORCID 0000-0003-1496-9341
Farah RehmanImperial College Healthcare NHS Trust, London, UK.
Jo BrettOxford Institute of Applied Health Research, Oxford Brookes University, Oxford, UK.ORCID 0000-0002-5116-4238
Nicky LevittOxford University Hospitals NHS Foundation Trust, Oxford, UK.
Mark TurnerResearch Software Engineering, Newcastle University, Newcastle upon Tyne, UK.
Sarah-Jane F StewartSchool of Psychology, University of Surrey, Guildford, UK.ORCID 0000-0003-2396-9028
Emma HuntOxford University Hospitals NHS Foundation Trust, Oxford, UK.
Hazeline TerradoOxford University Hospitals NHS Foundation Trust, Oxford, UK.
Eila WatsonOxford Institute of Applied Health Research, Oxford Brookes University, Oxford, UK.ORCID 0000-0002-3592-1315
Linda SharpPopulation Health Sciences Institute, Newcastle University, Newcastle upon Tyne, UK Linda.Sharp@newcastle.ac.uk.ORCID 0000-0001-9515-1722

Funding

the National Institute for Health and Care Research (NIHR) NIHR207952
6 · The paper itself

Abstract

introductionBreast cancer is the most common cancer in women in the UK. For women who have early-stage oestrogen-receptor positive (ER+ve) disease, daily oral adjuvant endocrine therapy reduces risk of recurrence. Recently, CDK4/6 inhibitors, a form of biological therapy, have been approved for use alongside endocrine therapy. However, trial data suggest there may be challenges with adherence to CDK4/6 inhibitors. This study aims to explore the experiences of adherence and support needs of women who have been prescribed CDK4/6 inhibitors for early ER+ve breast cancer. It will also co-develop an intervention to support women with adherence to these drugs alongside endocrine therapy through an evidence-based, theory-informed and patient-centred approach. METHODS AND ANALYSIS: The SWEET-PLUS study has three phases. Phase I uses semi-structured interviews or focus groups to explore the experiences of women with early breast cancer who have been prescribed CDK4/6 inhibitors. It will also explore their support needs and experiences of adherence. Phase II involves interviews or focus groups with healthcare professionals who support CDK4/6 inhibitor prescription and associated care to understand the existing support and unmet needs. Phase I and II findings will inform phase III, which comprises workshops and user testing interviews to co-develop an intervention to support women with adherence to CDK4/6 inhibitors alongside endocrine therapy. This will be delivered as an additional module prototype designed for future integration into the existing HT&Me intervention, which supports women with adherence to endocrine therapy.Data from phases I and II will be analysed using a framework approach-based thematic analysis. Phase III data will be analysed through content analysis. ETHICS AND DISSEMINATION: SWEET-PLUS received ethical approval from the National Health Services (NHS) Health Research Authority (Cambridge East Research Ethics Committee (25/EE/0220)). Research findings will be disseminated through peer-reviewed journal articles and via international and national conferences. Further dissemination will be guided by patient and public involvement.

Indexed as

Breast NeoplasmsCyclin-Dependent Kinase 4Cyclin-Dependent Kinase 6Medication AdherenceProtein Kinase InhibitorsAdherence InterventionsChemotherapy, AdjuvantClinical Trials as TopicFemaleFocus GroupsHumansMulticenter Studies as TopicQualitative ResearchUnited KingdomCDK4 protein, humanCDK6 protein, humanCyclin-Dependent Kinase 4Cyclin-Dependent Kinase 6Protein Kinase InhibitorsCancerMedication AdherencePatient-Centered CareQUALITATIVE RESEARCHSelf-Management

Identifiers

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.