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Table 3 Distribution of the frequencies of the GAA repeat sizes in normal alleles in 6 different populations

From: Friedreich ataxia in Norway – an epidemiological, molecular and clinical study

Normal alleles   Norwegian (present study) Finnish [43] Cuban [65] Indian [66] Caucasian [67] French [26]
    North South     
GAA repeat sizes 5-12 83.5 % 83 % 79.5 % 89.1 % 94.1 % 80 % 83 %
  13-34 16.5 % 17 % 20.5 % 10.9 % 5.9 % 20 % 17 %
Alleles range   6-34 6-27 7-27 5-31 7-16 5-23 7-34