Effects of Two-Phase Treatment with the Herbst and Preadjusted Edgewise Appliances on the Upper Airway Dimensions

Table 3

Descriptive statistics and comparison of variables at pretreatment (0), post-Herbst treatment (1), and postedgewise treatment (2) periods ().

									value			value			value
	Mean	SD	Mean	SD	Mean	SD	Mean	SD		Mean	SD		Mean	SD
Age (years)	12.8	1.3	13.9	1.5	15.7	1.8	1.1	0.3		1.9	1.1		3.0	1.1
Depth of upper airway (mm)
PM-UPW	25.5	3.8	25.2	4.7	25.4	3.6	−0.3	4.5	0.754	0.1	3.5	0.830	−0.1	3.6	0.852
U-MPW	10.3	4.1	11.5	2.9	11.2	2.5	1.1	1.6	0.001	−0.3	2.5	0.572	0.9	2.1	0.043
PASmin	10.6	1.5	11.9	3.5	12.0	3.3	1.3	2.9	0.029	0.1	3.3	0.886	1.4	2.8	0.016
V-LPW	17.6	7.8	19.2	3.9	20.3	3.5	1.6	3.0	0.008	1.1	2.9	0.069	2.7	2.6	<0.001
Skeletal morphology (°)
SNA	81.3	4.0	82.0	3.8	81.2	3.3	0.7	2.2	0.115	−0.8	2.9	0.148	−0.1	2.7	0.820
SNB	74.6	2.9	77.0	3.9	76.5	4.1	2.4	2.0	<0.001	−0.6	2.0	0.153	1.8	2.4	<0.001
ANB	6.7	3.3	5.0	2.3	4.8	2.1	−1.7	2.2	<0.001	−0.3	2.0	0.506	−2.0	2.0	<0.001
MnPl-SN	35.5	3.3	34.6	7.3	35.0	8.1	−0.8	2.1	0.052	0.4	3.0	0.553	−0.5	2.7	0.357

; ; .