Evidence map›Paper›PMID 19000394›Full record

Trial reportThe British journal of general practice : the journal of the Royal College of General Practitioners2008

Cost-effectiveness of magnetic resonance imaging of the knee for patients presenting in primary care.

DAMASK (Direct Access to Magnetic Resonance Imaging: Assessment for Suspect Knees) Trial Team

Erratum issuedAbstract readMulticenter StudyRandomized Controlled Trial
In one paragraph

Trial report in The British journal of general practice : the journal of the Royal College of General Practitioners, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 21 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed, 3 pooled it
–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

21 citing papers in PubMed, 3 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
  3. Referral interventions from primary to specialist care: a systematic review of international evidence.The British journal of general practice : the journal of the Royal College of General Practitioners · 2014
    Pooled it
  4. Trial
  5. Trial
  6. Trial
  7. Effectiveness of GP access to magnetic resonance imaging of the knee: a randomised trial.The British journal of general practice : the journal of the Royal College of General Practitioners · 2008
    Trial
  8. Article
  9. Magnetic Resonance Imaging in the Year Prior to Total Knee Arthroplasty: A Potential Overutilization of Healthcare Resources.Journal of the American Academy of Orthopaedic Surgeons. Global research & reviews · 2023
    Article
  10. Article
  11. Article
  12. Unicompartmental knee arthroplasty, an enigma, and the ten enigmas of medial UKA.Journal of orthopaedics and traumatology : official journal of the Italian Society of Orthopaedics and Traumatology · 2020
    Review
  13. Review
  14. Article
  15. A clinical prediction rule for meniscal tears in primary care: development and internal validation using a multicentre study.The British journal of general practice : the journal of the Royal College of General Practitioners · 2015
    Article
  16. Article
  17. Advanced imaging: use and misuse.Journal of feline medicine and surgery · 2012
    Review
  18. Radiology and primary care in Europe.Insights into imaging · 2010
    Article
  19. Article
  20. Direct access to diagnostic services.The British journal of general practice : the journal of the Royal College of General Practitioners · 2009
    Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

1 author.

DAMASK (Direct Access to Magnetic Resonance Imaging: Assessment for Suspect Knees) Trial Team

Funding

Medical Research Council G0001133
6 · The paper itself

Abstract

backgroundMusculoskeletal problems generate high costs. Of these disorders, patients with knee problems are commonly seen by GPs. Magnetic resonance imaging (MRI) of the knee is an accurate diagnostic test, but there is uncertainty as to whether GP access to MRI for these patients is a cost-effective policy.

aimTo investigate the cost-effectiveness of GP referral to early MRI and a provisional orthopaedic appointment, compared with referral to an orthopaedic specialist without prior MRI for patients with continuing knee problems. DESIGN OF STUDY: Cost-effectiveness analysis alongside a pragmatic randomised trial.

settingFive-hundred and thirty-three patients consulting their GP about a knee problem were recruited from 163 general practices at 11 sites across the UK.

methodTwo-year costs were estimated from the NHS perspective. Health outcomes were expressed in terms of quality-adjusted life years (QALYs), based on patient responses to the EQ-5D questionnaire administered at baseline, and at 6, 12, and 24 months' follow-up.

resultsEarly MRI is associated with a higher NHS cost, by £294 ($581; €435) per patient (95% confidence interval [CI] = £31 to £573), and a larger number of QALYs, by 0.050 (95% CI = −0.025 to 0.118). Mean differences in cost and QALYs generated an incremental cost per QALY gained of £5840 ($11 538; €8642). At a cost per QALY threshold of £20 000, there is a 0.81 probability that early MRI is a cost-effective use of NHS resources [corrected].

conclusionGP access to MRI for patients presenting in primary care with a continuing knee problem represents a cost-effective use of health service resources.

Indexed as

Cost-Benefit AnalysisEarly DiagnosisFamily PracticeHumansKnee InjuriesMagnetic Resonance ImagingReferral and ConsultationSurveys and Questionnaires

Identifiers

PMID19000394
PMCPMC2576309

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

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 OpenQuestion graph.