The incidence rate is the frequency of new cases of a disease in a population over a certain period of time and is generally calculated as a fraction of 100,000 (population) per year. The incidence of epilepsy varies widely among countries, with most studies showing an annual incidence of epilepsy (recurrent unprovoked seizures) ranging from 24/100,000 to 53/100,000. Some developing countries have a higher incidence of epilepsy than developed countries, even exceeding 100/100,000. The incidence of epilepsy in China is less reported at 25 to 35/100,000. The annual incidence of epilepsy in children is even less frequently reported, and the incidence of epilepsy in children is higher than that in adults, with the highest incidence in the first year of life and decreasing with age.