Changes in the Upper and Lower Pharyngeal Airway Spaces Associated with Rapid Maxillary Expansion

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 (𝑃>0.05).