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Table 1 Distribution of adolescents regarding sex, posterior crossbite, and angle classification

From: Mini Hyrax vs Hyrax expanders in the rapid palatal expansion in adolescents with posterior crossbite: a randomized controlled clinical trial

  Mini Hyrax Hyrax p value
N (%) N (%)  
Sex    
 Male 8 (53.3) 7 (46.7) 1.000a
 Female 7 (46.7) 8 (53.3)  
Posterior crossbite    
 Bilateral 5 (33.3) 4 (26.7) 0.811b
 Unilateral right side 6 (40.0) 5 (33.3)  
 Unilateral left side 4 (26.7) 6 (40.0)  
Angle classification    
 Class I 5 (33.3) 6 (40.0) 1.000b
 Class II 4 (26.7) 4 (26.7)  
 Class III 6 (40.0) 5 (33.3)  
  1. aPearson’s chi-square test
  2. bFisher’s exact test