This article discusses the epidemiology and natural history of chronic subdural hematoma (CSDH), a common disease prevalent in the elderly population. The incidence of CSDH ranges from 1.72 to 20.6 per 100,000 persons per year. Risk factors include advancing age, male gender, and antiplatelet or anticoagulant use. Clinical progression is separated into 3 distinct periods, including the initial traumatic event, the latency period, and the clinical presentation period. The recurrence of CSDH and nonsurgical predictive factors are described in detail to provide a comprehensive understanding of the outcome of this disease.
Keywords: Chronic subdural hematoma; Epidemiology; Natural history; Pathogenesis.
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