Clinical Scorecard: Assessing the Risk of Chronic Subdural Hematoma in Older Adults Following Mild Traumatic Brain Injury

At a Glance

Key Highlights

• Older adults (≥65 years) with mild TBI have an increased risk of developing CSDH within 2–12 weeks post-injury.
• Risk factors include older age, male sex, use of antithrombotic agents (antiplatelets and anticoagulants), and pathological CT findings at initial injury.
• No validated clinical diagnostic rules currently exist to stratify mild TBI patients by CSDH risk; this study aims to develop a bedside prediction model.

Guideline-Based Recommendations

Diagnosis

• Identify mild TBI patients using Glasgow Coma Scale (GCS) scores of 14–15 or presumed mild injury if GCS undocumented.
• Confirm CSDH diagnosis 2–12 weeks post-injury via CT imaging and ICD-9 diagnostic codes.
• Exclude patients with urgent neurosurgical intervention for acute subdural hematoma to avoid confounding outcomes.

Management

• Monitor older adults with mild TBI closely, especially those on antithrombotic therapy or with pathological CT findings.
• Consider integrated electronic health records to track demographics, comorbidities, medications, and imaging for comprehensive care.
• Avoid ICU admission bias by excluding ICU patients when assessing mild TBI outcomes related to CSDH.

Monitoring & Follow-up

• Follow patients for at least 12 weeks post-injury to detect development of CSDH.
• Use electronic health records to monitor for new diagnoses or surgical interventions related to CSDH.
• Apply statistical models accounting for repeated mild TBI events in the same patient to refine risk assessment.

Risks

• Increased incidence of CSDH in elderly populations, especially with antithrombotic use and pathological CT findings.
• Potential poor long-term functional, mental, and cognitive outcomes following surgical drainage of CSDH.
• Lack of validated clinical prediction tools may delay identification and management of high-risk patients.

Patient & Prescribing Data

Older adults (≥65 years) insured by integrated health services with documented mild TBI

Pre-existing use of antiplatelet or anticoagulant medications is associated with higher risk of developing CSDH post mild TBI; medication data integration is critical for risk stratification.

Clinical Best Practices

• Incorporate comprehensive electronic health record data including demographics, comorbidities, medications, and imaging findings for risk assessment.
• Use multivariable logistic regression and generalized estimating equations to identify and validate risk factors for CSDH.
• Exclude patients with urgent neurosurgical interventions for acute subdural hematoma when studying CSDH risk post mild TBI to avoid confounding.
• Monitor mild TBI patients for at least 12 weeks post-injury to detect delayed CSDH development.
• Recognize the need for developing and validating clinical prediction models to stratify mild TBI patients by CSDH risk.

References

• Centers for Disease Control and Prevention TBI Data
• Soroka University Medical Center and Clalit Health Services Integration