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Table 1 Characterization of the studied subjects according to group assignment

From: Nystagmus as an early ocular alteration in Machado-Joseph disease (MJD/SCA3)

   N Group 1 N Group 2 N Group 3
  Gender 68 33♀|35♂ 48 29♀|19♂ 42 26♀|17♂
  Age 68 48 ± 15 [16–82] 48 30 ± 9 [18–59] 42 36 ± 12 [18–60]
CAG repeats Normal allele 60 20 ± 5 [13–28] 44 22 ± 5 [13–27] 42 17 ± 4 [13–27] 23 ± 4 [13–31]
Expanded allele 64 71 ± 4 [61–80] 46 71 ± 4 [63–80]    
  1. All variables were presented as mean ± standard deviation [range]. Gender was represented as ♀ for female and ♂ for male.