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Table 1 Descriptive statistics and statistical analysis of the treated sample recorded at T1, T2, and T3

From: Anchorage onto deciduous teeth: effectiveness of early rapid maxillary expansion in increasing dental arch dimension and improving anterior crowding

  Time Comparisons
  T1 T2 T3 T1 vs T2 T1 vs T3 T2 vs T3
n = 20 n = 20 n = 20    
Inter-canine width       
 mean (SD), mm 28.0(1.9) 34.4(2.4) 32.2(2.0) S* S* S*
 95 % CI 27.1 to 28.9 33.3 to 35.6 31.3 to 33.1    
Inter-canine arch       
 mean (SD), mm 30.7(3.2) 41.1(4.7) 37.0(3.6) S S S
 95 % CI 29.2 to 32.3 38.7 to 43.3 35.3 to 38.7    
Inter-molar width       
 mean (SD), mm 44.8(2.5) 49.7(1.9) 49.6(2.3) S S NS
 95 % CI 43.7 to 46.0 48.7 to 50.5 48.5 to 50.6    
Inter-molar depth       
 mean (SD), mm 29.8(1.7) 30.9(2.1) 30.6(1.9) S § S § NS §
 95 % CI 29.0 to 30.6 30.0 to 31.9 29.7 to 31.4    
  1. S is the significant result of the Tukey test performed after the repeated-measures ANOVA *(F (2,21) = 17.21; p < 0.001; power of the test = 100 %); (F (2,21) = 11.67; p < 0.001; power of the test = 100 %); (F (2,21) = 18.79; p < 0.001; power of the test = 100 %). § S is the significant result and NS is the non-significant result of the Tukey test performed after the repeated-measures ANOVA (F (2,19) = 17.13; p < 0.001; power of the test = 99 %)