Cyclical variation in the incidence of childhood-onset type 1 diabetes during 40 years in Navarra (Spain).

Objective: To trace the evolution of type 1 diabetes (T1D) in Navarre in children under 15, between 1977 and 2016, and their characteristics at onset regarding age and sex.

Subjects And Methods: We performed a descriptive analysis, using prospective-retrospective information. The study included all cases of T1D diagnosed in Navarre in children aged 0 to 14 years old from 1 January 1977 until 31 December 2016.