Table 2. Regression analysis of changes in Little's index at T2-T1 (dependent variable) and the following independent variables: intercanine width (IcW), intermolar width (ImW), Little's index (LI) at T1 and total arch length (TAL).

Independent variables	IcW T1		ImW T1		LI T1		TAL		F	p value
Dependent variable	R2	p value	R2	p value	R2	p value	R2	p value
LI T2-T1	0.73	0.3179	14.5	0.0869	0.01	0.1938	10.35	0.1636	1.29	0.3179