Fig. 2
From: Onset features and time to diagnosis in Friedreich’s Ataxia
Relationship between age at onset and GAA1-repeat length depending on onset symptoms. The length of the shorter GAA repeat (GAA1) is plotted against age at onset (years) in the groups with (a) neurological onset and (b) non-neurological onset. As evident in the graphics, a significant correlation between the GAA1 repeat length and age at onset is present in case of classical onset with neurological symptoms (r = − 0,6; p < 0,0001), while no correlation is found in the group with non-neurological onset (r = − 0,1; p = 0,4)