Читать книгу Neurology - Charles H. Clarke - Страница 18

Mortality rate: the number dying of a condition divided by the number in the population.

This information is of limited value without knowledge of the overall death rate.

Life expectancy (median survival age) is often lowered in neurological disease, but data are complex.

Taking epilepsy, one study followed over 500 cases for >10 years. The overall mortality ratio was 2.1. The hazard ratio (HR), or risk of death, for epilepsy overall, was 6.2. Life expectancy was reduced by some 2–10 years.