Evans, TS, Dhir, P, Radley, D et al. (8 more authors) (2023) Does the design of the NHS Low Calorie Diet Programme have fidelity to the programme specification? A documentary review of service parameters and behaviour change content in a Type 2 Diabetes intervention. Diabetic Medicine, 40 (4). e15022. ISSN 0742-3071
Abstract
Background
NHS England commissioned four independent service providers to pilot low-calorie diet programmes to drive weight loss, improve glycaemia and potentially achieve remission of Type 2 Diabetes across 10 localities. Intervention fidelity might contribute to programme success. Previous research has illustrated a drift in fidelity in the design and delivery of other national diabetes programmes.
Aims
(1) To describe and compare the programme designs across the four service providers; (2) To assess the fidelity of programme designs to the NHS England service specification.
Methods
The NHS England service specification documents and each provider's programme design documents were double-coded for key intervention content using the Template for Intervention Description and Replication Framework and the Behaviour Change Technique (BCT) Taxonomy.
Results
The four providers demonstrated fidelity to most but not all of the service parameters stipulated in the NHS England service specification. Providers included between 74% and 87% of the 23 BCTs identified in the NHS specification. Twelve of these BCTs were included by all four providers; two BCTs were consistently absent. An additional seven to 24 BCTs were included across providers.
Conclusions
A loss of fidelity for some service parameters and BCTs was identified across the provider's designs; this may have important consequences for programme delivery and thus programme outcomes. Furthermore, there was a large degree of variation between providers in the presence and dosage of additional BCTs. How these findings relate to the fidelity of programme delivery and variation in programme outcomes and experiences across providers will be examined.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2022 The Authors. Diabetic Medicine published by John Wiley & Sons Ltd on behalf of Diabetes UK. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
Keywords: | behaviour change, intervention design, intervention fidelity, low-calorie diet, total diet replacement, type 2 diabetes, weight management |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Medicine and Health (Leeds) > School of Medicine (Leeds) > Leeds Institute of Health Sciences (Leeds) > Academic Unit of Psychiatry and Behavioural Sciences (Leeds) The University of Leeds > Faculty of Medicine and Health (Leeds) > School of Psychology (Leeds) |
Funding Information: | Funder Grant number NIHR National Inst Health Research NIHR132075 |
Depositing User: | Symplectic Publications |
Date Deposited: | 14 Dec 2022 12:58 |
Last Modified: | 22 Dec 2023 08:33 |
Status: | Published |
Publisher: | Wiley |
Identification Number: | 10.1111/dme.15022 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:194066 |