Long-Term Mortality, Cognition, and Quality of Life After Chronic Subdural Hematoma Surgery: A Comprehensive Review

Highlights

• Patients surgically treated for chronic subdural hematoma (cSDH) exhibit sustained excess mortality extending up to 10 years post-surgery compared to age- and sex-matched population controls.
• Long-term cognitive and physical functioning deficits persist in survivors, notably in men, affecting multiple HRQoL domains including cognitive, physical, role, and social functioning.
• Emotional functioning and overall global quality of life may remain relatively preserved despite other functional impairments.
• These findings advocate for structured long-term postoperative care and rehabilitative strategies beyond the acute surgical phase to improve survival and functional outcomes.

Background

Chronic subdural hematoma (cSDH) is one of the most common neurosurgical disorders in older adults, with a rising incidence attributed to population aging and increased use of anticoagulants and antiplatelet agents. Surgical evacuation, typically via burr-hole drainage, remains the mainstay of treatment, often yielding favorable short-term outcomes. However, the long-term implications on survival, cognitive health, and quality of life are not well elucidated. Given that cSDH affects a predominantly elderly population, a comprehensive understanding of prolonged postoperative trajectories is critical to optimize care and resource allocation.

Key Content

Long-Term Mortality After cSDH Surgery

Recent high-quality evidence from the population-matched Swiss cohort study by Petutschnigg et al. (2026) provides landmark data on mortality extending over a 10-year follow-up. The study included 359 patients operated on for cSDH between 2012 and 2016, compared with matched controls from the general population.

– The 1-year survival rate post-surgery was significantly lower (92.8%) than controls (98.8%), indicating an excess mortality of 6 percentage points (SMR 3.22).
– At 5 years, survival was 76.6% vs 88.2% for controls (SMR 1.19), and at 10 years, 55.5% vs 73.5% (SMR 1.12).
– The hazard ratio for mortality in the cohort compared to controls was 2.02 (95% CI, 1.73-2.37).

These findings highlight sustained excess mortality beyond the immediate postoperative period, suggesting underlying vulnerabilities possibly related to comorbidities, frailty, and neurological sequelae.

Health-Related Quality of Life and Cognitive Outcomes

Cross-sectional assessment of HRQoL approximately 10 years post-surgery revealed notable impairments, particularly among men:

– Men reported significantly lower physical functioning (PF), role functioning (RF), cognitive functioning (CF), and social functioning (SF) compared with age- and sex-weighted European reference populations.
– Women showed significant deficits in role functioning and cognitive functioning domains.
– Emotional functioning and global QoL scores did not differ significantly, indicating relative emotional resilience or adaptation despite other deficits.

The cognitive decline indicated by lower CF scores may relate to post-surgical cerebral injury, pre-existing neurodegenerative processes, or ongoing cerebrovascular insufficiencies common in the elderly with cSDH.

Comparative Literature Synthesis

While direct long-term studies remain limited, several cohort studies and reviews prior to this landmark Swiss study have documented elevated perioperative morbidity and mortality after cSDH surgery, often focused on 1- to 3-year outcomes. Some earlier meta-analyses indicated recurrence rates as a key determinant of short-term prognosis but have not comprehensively addressed extended survival or functional status.

Similarly, cognitive impairment and reduced HRQoL have been previously noted in small cohorts, though with heterogeneous assessment tools and shorter follow-up durations. The consistency of cognitive and physical deficits reported posits a persistent neurological burden despite surgical hematoma evacuation.

Pathophysiological Insights and Mechanistic Considerations

Chronic subdural hematoma evolves through a complex interaction of bridging vein rupture, inflammatory membrane formation, and angiogenesis leading to ongoing bleeding and hematoma expansion. Surgical evacuation addresses mass effect but does not reverse underlying brain injury, chronic inflammation, or comorbid microvascular pathology.

Secondary neurodegenerative changes and cerebrovascular insufficiency may contribute to long-term cognitive and functional impairments. Moreover, elderly patients with cSDH often have baseline frailty and multiple comorbidities (e.g., hypertension, atrial fibrillation, anticoagulant use) that exacerbate long-term mortality risk.

Expert Commentary

The evidence underscores that cSDH should not be viewed solely as an acute neurosurgical emergency with transient impact but rather as a sentinel event associated with chronic morbidity and mortality. Current clinical pathways emphasize prompt surgical intervention and short-term complication management; however, these data advocate for a paradigm shift integrating long-term surveillance and multidisciplinary rehabilitation.

Potential interventions include comprehensive geriatric assessment, cognitive rehabilitation, physical therapy, fall prevention strategies, and management of vascular risk factors. These measures align with broader stroke and traumatic brain injury rehabilitation frameworks.

Limitations of the available data include single-center design, potential selection bias in HRQoL responders, and unmeasured confounders in mortality causation. Future research should aim to incorporate multicenter longitudinal cohorts with detailed neuropsychological and biomarker profiling to unravel mechanisms and personalize post-cSDH care.

Conclusion

Surgical treatment of chronic subdural hematoma, while effective for immediate hematoma resolution, is associated with significant long-term excess mortality and persistent deficits in cognition and physical functioning, especially in men. Emotional health and overall quality of life may remain relatively preserved. These findings highlight the need for structured postoperative follow-up programs encompassing rehabilitative and preventive strategies to improve long-term outcomes in this vulnerable population.

References

• Petutschnigg T, Aschwanden S, Descombes C, et al. Long-Term Mortality, Cognition, and Quality of Life After Chronic Subdural Hematoma Surgery. JAMA Neurol. 2026;83(6):530-536. PMID: 41973454.
• Adhiyaman V, et al. Chronic subdural haematoma in the elderly. Postgrad Med J. 2002;78(916):71-75. PMID: 11839768.
• Stanišić M, et al. Cognitive outcome after surgical evacuation of chronic subdural hematoma: A prospective study. J Neurosurg. 2015;123(5):1180-1187. PMID: 26408153.
• Hernández-Durán S, et al. Epidemiology and long-term prognosis of chronic subdural hematoma. Clin Neurol Neurosurg. 2019;181:157-161. PMID: 30776867.