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Table 2 Descriptive statistics and statistical comparisons on the T2–T1 changes (Kruskal-Wallis test or ANOVA or with Tukey’s post hoc tests)

From: Mandibular response after rapid maxillary expansion in class II growing patients: a pilot randomized controlled trial

Variables RME bonded (1) (n = 10) RME banded (2) (n = 10) Controls (3) (n = 10) P 1 vs 2 2 vs 3 1 vs 3
Mean median SD 25/75 Mean median SD 25/75 Mean median SD 25/75
Age 1.0 0.1 1.0 1.0/1.1 1.0 0.1 0.742 0.0 0.0 0.0
Sagittal skeletal
 SNA (deg) 0.0 0.4 − 0.1 0.4 − 0.2 0.9 0.845 0.1 0.1 0.2
 SNB (deg) 0.5 0.5 0.2 0.6 0.2 0.7 0.390 0.3 0 0.3
 ANB (deg) − 0.7 0.6 − 0.2 0.7 − 0.3 1.0 0.412 − 0.5 0.1 − 0.4
 Pg to NPerp (mm) 0.8 0.7 0.4 1.0 0.1 1.2 0.296 0.4 0.3 0.7
 Co-Gn (mm) 0.6 1.2 0.7 1.1 0.9 0.4 0.837 − 0.1 − 0.2 − 0.3
Vertical skeletal
 SN to mandibular plane (deg) −0.6 0.8 0.5 0.6 0.9 0.7 0.000 − 1.1** − 0.4 − 1.5***
 ArGoMe (deg) −0.9 0.7 0.4 1.2 0.6 1.3 0.012 − 1.3* − 0.2 − 1.5*
 LAFH (mm) −0.3 0.8 0.5 0.7 0.6 1.1 0.064 − 0.8 − 0.1 − 0.9
Interdental
 Overjet (mm) − 0.7 − 1.4/− 0.4 − 0.8 − 0.9/− 0.2 − 0.2 − 0.5/0.0 0.070 0.1 − 0.6 − 0.5
 Overbite (mm) 0.5 0.3/2.2 0.2 − 0.1/1.5 0.3 − 0.4/0.9 0.154 0.3 − 0.1 0.2
 Molar relationship (mm) 1.1 0.7 0.8 0.7 0.4 0.8 0.154 0.3 0.4 0.7
  1. deg degrees, 25/75 25th percentile/75th percentile
  2. *P < 0.05; **P < 0.01; ***P < 0.001