Fig. 1From: Autonomic breathing abnormalities in Rett syndrome: caregiver perspectives in an international database studyKaplan–Meier failure functions for age of onset of autonomic disturbances in girls and women with Rett syndrome who were younger than 10 years old at time of ascertainment. Top: breath-holding (n = 95). Bottom: hyperventilation (n = 93)Back to article page