Status epilepticus in the elderly: Comparison with younger adults in a comprehensive community hospital.

PURPOSE

Previous studies on status epilepticus (SE) in the elderly were conducted in tertiary centers. We aimed to delineate the features and outcomes of elderly SE patients by comparing them to those of younger patients in a comprehensive community hospital providing primary to tertiary care.

METHODS

We retrospectively investigated 197 consecutive adult SE patients admitted to our hospital. The clinical, electroencephalography, and diffusion-weighted imaging (DWI) findings of 112 elderly patients (aged ≥65 years) were compared to those of 85 younger patients (aged <65 years).

RESULTS

Compared to that in younger patients, SE in elderly patients more frequently presented de novo (68.8% vs. 52.9%, p = 0.02); was less likely to be tonic-clonic (55.4% vs. 83.5%, p < 0.001) but more likely to be focal motor (36.6% vs. 12.9%, p < 0.001); and was more frequently refractory (30.4% vs. 14.1%, p = 0.008), particularly refractory nonconvulsive SE (13.4% vs. 4.7%, p = 0.04). Lateralized periodic discharges on electroencephalography (20.9% vs. 4.8%, p = 0.001) and SE-associated hyperintensities on DWI (27.8% vs. 13.6%, p = 0.03) were more common in the elderly than in the younger SE patients. The mortality rates did not significantly differ between the groups (6.3% vs. 3.5%, p = 0.52). The percentage of poor functional outcomes did not significantly differ between the groups in cases with acute symptomatic etiology (52.0% vs. 45.7%, p = 0.63), but was higher in elderly patients with remote symptomatic and cryptogenic etiologies (33.3% vs. 12.0%, p = 0.006).

CONCLUSIONS

SE in the elderly differed from that in younger adults in the semiology, refractoriness, electroencephalography and DWI findings, and functional outcome. Outcomes were better than previously reported.