Primary Care referral for knee MRI in the United Kingdom: Association with demography and subsequent surgical intervention

Jayaram, Prem R., Sun, Julia, Coombes, Emma, Mackay, James, Kasmai, Bahman, MacNamara, Iain, Jones, Andrew P., Denton, Erika R.E. and Toms, Andoni D. (2019) Primary Care referral for knee MRI in the United Kingdom: Association with demography and subsequent surgical intervention. Journal of Magnetic Resonance Imaging. ISSN 1053-1807

[img] PDF (Accepted manuscript) - Submitted Version
Restricted to Repository staff only until 13 January 2020.

Download (2226kB) | Request a copy


    BACKGROUND: Since 2008 primary care physicians (GPs) in our region have been allowed open access to knee MRI scans. There are questions about whether this changes referral practice and if it is an effective use of resources. PURPOSE: To describe the change in demographics of patients referred for knee MRI following implementation of a new referral pathway. STUDY TYPE: Retrospective observational study. POPULATION: All primary care referrals between 2008 and 2015 for knee MRI from a population of 900,000. FIELD STRENGTH/SEQUENCE: Not applicable. ASSESSMENT: Demographic profile and number of knee MRI referrals and subsequent arthroscopies. STATISTICAL TESTS: Comparisons between urban and rural populations used T-test. Test for normality used Shapiro-Wilk. Comparison between abnormal MRI proportions used Chisquared test. RESULTS: There were 23928 knee MRI referrals (10695 from GPs) between 2000 and 2015. MRI knee referrals rose from 210 in 2008 to 2379 in 2015. The average age of the patient decreased from 46.8 (SD=14.9) in 2008 to 41.3 (SD=14.7) in 2015. Conversion to arthroscopy declined from 15.4% to 10.2% but there was no significant change in abnormal scan proportion. Conversion rates showed no significant difference between rural (9.6%) and urban populations (10.5%). Referral rates were significantly higher in low socioeconomic status areas (47.3% vs 34.6%). The median referral rate per 1,000 patients was 13.8 (IQR=8.4). Referral rates varied widely between practices. DATA CONCLUSION: Despite a large rise in knee MRI referrals from primary care there has been no substantial change in the age profile, suggesting that there has been no increase in inappropriate referral of elderly patients in whom MRI is unlikely to influence management. A modest decrease in conversion rate to arthroscopy may be reasonably offset against a decrease in secondary care referrals. Socioeconomic status of the target population must be considered when planning primary care knee MRI services.

    Item Type: Article
    Uncontrolled Keywords: knee mri,primary care referral,open access,mri value
    Faculty \ School: Faculty of Medicine and Health Sciences > Norwich Medical School
    Depositing User: LivePure Connector
    Date Deposited: 24 Oct 2018 11:30
    Last Modified: 09 Apr 2019 13:50
    DOI: 10.1002/jmri.26560

    Actions (login required)

    View Item