Table 2.

Mean changes in the cephalometric variables at different time intervals

	ΔT1-T0a			ΔT2-T1b
Variable	Mean	SD	Sig	Mean	SD	Sig
Skeletal
ΔANB (°)	-0.95	0.97	***	0.14	0.52	NS
ΔFMA (°)	-1.70	1.82	***	0.70	1.64	*
ΔSN-GoMe (°)	-2.11	1.36	***	0.73	1.17	**
ΔSNPog (°)	1.03	1.04	***	-0.12	0.91	NS
ΔAFH (mm)	-2.70	1.37	***	0.81	1.37	**
Dental
ΔIMPA (°)	-6.16	7.33	***	2.40	2.15	***
ΔU6-PP (mm)	-2.30	1.29	***	0.33	1.50	NS
ΔU1-PP (mm)	-2.04	1.66	***	0.83	0.92	***
ΔL1-MP (mm)	-2.33	1.83	***	0.42	0.89	*

Negative values represent decreases during treatment or retention; positive values represent increases during treatment or retention

Sig significance, NS Not significant

^*P < 0.05; **P < 0.01; ***P < 0.001

^aΔT1-T0, change from initial evaluation to immediately after treatment

^bΔT2-T1, change during at least one year of retention;