Table 1: Comparison between experimental and control groups at initial and final records.

Parameters RME Group (n = 30) Control Group (n = 30) P-value Age (years) 14.2 ± 1.3 13.8 ± 1. 5 0.28* Gender 16 B, 14 G 16 B, 14 G 1.0* Treatment duration (months) 30.2 ± 3.2 25.8 ± 3.3 <0.0001 Initial upper pharyngeal airway (millimeter) 14.6 ± 1.9 15.4 ± 1.5 0.08* Initial lower pharyngeal airway (millimeter) 10.7 ± 1.5 11.3 ± 1.6 0.12* Difference (pre/post) upper pharyngeal airway (millimeter) 1.3 ± 1.1 0.5 ± 1.3 0.016 Difference (pre/post) lower pharyngeal airway (millimeter) 0.2 ± 1.0 0.4 ± 0.9 0.30*

B: boys, G: girls, *Not Significant ().