Route to diagnosis of degenerative cervical myelopathy in a UK healthcare system: a retrospective cohort study.


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Authors
Hilton, Bryn 
Tempest-Mitchell, Jennifer  ORCID logo  https://orcid.org/0000-0002-3990-140X
Davies, Benjamin 
Kotter, Mark 
Abstract

OBJECTIVES: Degenerative cervical myelopathy (DCM) presents insidiously, making initial diagnosis challenging. Surgery has been shown to prevent further disability but existing spinal cord damage may be permanent. Delays in surgery lead to increased disability and reduced postoperative improvements. Therefore, rapid surgical assessment is key to improving patient outcomes. Unfortunately, diagnosis of DCM in primary care is often delayed. This study aimed to characterise patients with DCM route to diagnosis and surgical assessment as well as to plot disease progression over time. DESIGN: Retrospective, observational cohort study. SETTING: Single, tertiary centre using additional clinical records from primary and secondary care centres. PARTICIPANTS: One year of cervical MRI scans conducted at a tertiary neurosciences centre (n=1123) were screened for cervical cord compression, a corresponding clinical diagnosis of myelopathy and sufficient clinical documentation to plot a route to diagnosis (n=43). PRIMARY OUTCOME MEASURES: Time to diagnosis from symptom onset, route to diagnosis and disease progression were the primary outcome measures in this study. Disease severity was approximated using a prospectively validated method for inferring modified Japanese Orthopaedic Association (i-mJOA) functional scoring from clinical documentation. RESULTS: Patients received a referral to secondary care 6.4±7.7 months after symptom onset. Cervical MRI scanning and neurosurgical review occurred 12.5±13.0 and 15.8±13.5 months after symptom onset, respectively. i-mJOA was 16.0±1.7 at primary care assessment and 14.8±2.5 at surgical assessment. 61.0% of patients were offered operations. For those who received surgery, time between onset and surgery was 22.1±13.2 months. CONCLUSIONS: Route to surgical assessment was heterogeneous and lengthy. Some patients deteriorated during this period. This study highlights the need for a streamlined pathway by which patients with cervical cord compression can receive timely assessment and treatment by a specialist. This would improve outcomes for patients using existing treatments.

Description
Keywords
cervical, degeneration, myelopathy, spondylosis, Aged, Cervical Vertebrae, Cohort Studies, Delivery of Health Care, Disease Progression, Female, Humans, Magnetic Resonance Imaging, Male, Middle Aged, Neurodegenerative Diseases, Retrospective Studies, Spinal Cord Compression, Spinal Cord Diseases, United Kingdom
Journal Title
BMJ Open
Conference Name
Journal ISSN
2044-6055
2044-6055
Volume Title
9
Publisher
BMJ
Sponsorship
Department of Health (via National Institute for Health Research (NIHR)) (CS-2015-15-023)
Research in the senior author’s laboratory is supported by a core support grant from the Wellcome Trust and MRC to the Wellcome Trust-Medical Research Council Cambridge Stem Cell Institute. MRNK is supported by a NIHR Clinician Scientist Award. Disclaimer: This report is independent research arising from a Clinician Scientist Award, CS-2015-15-023, supported by the National Institute for Health Research. The views expressed in this publication are those of the authors and not necessarily those of the NHS, the National Institute for Health Research or the Department of Health.