Flowchart on data processing and number of patients. Data extraction revealed 1072 patients with CAH but only 377 children younger than 3 years of age suffering from SW-CAH. SW-CAH, salt wasting CAH; I-CAH registry, International congenital adrenal hyperplasia registry; FC, fludrocortisone; ST, salt treated at least between two time points between birth and 365 days of life; NST, non-salt-treated.