Trial reportBMJ open2019
Reducing unnecessary vitamin testing in general practice: barriers and facilitators according to general practitioners and patients.
Trial report in BMJ open, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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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.
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.
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Who cites it
11 citing papers in PubMed, 23 citations in OpenAlex.
- Repeated Measurements of Vitamin D: Common and Very Unlikely to Indicate Deficiency.Clinical endocrinology · 2026Article
- Prevalence of malnutrition among hospital admissions to English NHS hospitals over two economically constrained decades: evidence from routine health data.BMJ public health · 2025Article
- Understanding Healthcare Personnel's Perceptions About Reducing Low-Value Care: A Scoping Review.Risk management and healthcare policy · 2024Article
- Clinical chemistry laboratory test overuse in a cardiology clinic: a single-center study.Journal of medicine and life · 2023Article
- Low-value pharmaceutical care among Dutch GPs: a retrospective cohort study.The British journal of general practice : the journal of the Royal College of General Practitioners · 2022Article
- Conflict of Interests in the Scientific Production on Vitamin D and COVID-19: A Scoping Review.Frontiers in public health · 2022Article
- De-implementing low-value care in endocrinology.Endocrine · 2021Review
- Testing and Prescribing Vitamin B12 in Swiss General Practice: A Survey among Physicians.Nutrients · 2021Article
- Article
- Identifying and de-implementing low-value care in primary care: the GP's perspective-a cross-sectional survey.BMJ open · 2020Article
- A prospective, cross-sectional study on association of serum vitamin D level with musculoskeletal symptoms and blood pressure in adult population.Journal of family medicine and primary care · 2020Article
Corrections and comments
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Authors and funding
8 authors at 3 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
objectiveThere has been an increase in testing of vitamins in patients in general practice, often based on irrational indications or for non-specific symptoms, causing increasing healthcare expenditures and medicalisation of patients. So far, there is little evidence of effective strategies to reduce this overtesting in general practice. Therefore, the aim of this qualitative study was to explore the barriers and facilitators for reducing the number of (unnecessary) vitamin D and B DESIGN AND
settingThis qualitative study, based on a grounded theory design, used semistructured interviews among general practitioners (GPs) and patients from two primary care networks (147 GPs, 195 000 patients). These networks participated in the Reducing Vitamin Testing in Primary Care Practice (REVERT) study, a clustered randomized trial comparing two de-implementation strategies to reduce test ordering in primary care in the Netherlands.
participantsTwenty-one GPs, with a maximum of 1 GP per practice who took part in the REVERT study, and 22 patients (who were invited by their GP during vitamin-related consultations) were recruited, from which 20 GPs and 19 patients agreed to participate in this study.
resultsThe most important factor hampering vitamin-test reduction programmes is the mismatch between patients and medical professionals regarding the presumed appropriate indications for testing for vitamin D and B
conclusionTo achieve a sustainable reduction in vitamin testing, guidelines with clear and uniform recommendations on evidence-based indications for vitamin testing, combined with regular (individual) feedback on test-ordering behaviour, are needed. Moreover, the general public needs access to clear and reliable information on vitamin testing. Further research is required to measure the effect of these strategies on the number of vitamin test requests. TRIAL REGISTRATION NUMBER: WAG/mb/16/039555.
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