Progress in Orthodontics

Table 4 Differences between T2 (end of therapy) and T1 (begin of therapy) in the two subgroups. Between-groups differences

From: A retrospective cephalometric study on pharyngeal airway space changes after rapid palatal expansion and Herbst appliance with or without skeletal anchorage

	Subgroup 1 T2–T1	Subgroup 2 T2–T1	p value
SNA (degrees)	−0.9 ± 1.6	−0.8 ± 2.5	0.88
SNB (degrees)	1.3 ± 1.7	0.8 ± 1.7	0.36
ANB (degrees)	−2.3 ± 1.1	−1.6 ± 2	0.18
SN-GoMe (degrees)	−1 ± 2.5	0.5 ± 2.2	0.05
A/Olp (mm)	−0.8 ± 2.2	0.1 ± 1.8	0.17
Pg/Olp (mm)	2.3 ± 3.3	1 ± 1.9	0.13
AD1 (mm)	1.1 ± 3.5	0.9 ± 1.9	0.74
AD2 (mm)	2.4 ± 1	0.9 ± 1.4	0.00*
AD-PtV (mm)	1.7 ± 1.4	0.9 ± 1.4	0.07
OA (mm)	1.7 ± 1.2	0.9 ± 0.6	0.01*
LA (mm)	1.65 ± 3.6	1 ± 2.2	0.49

*p < 0.05

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