Table 2.

Results of the regression model. The significance of the regression parameters is indicated as a superscript.

Group	Regression Coefficient	p
Expansion	$\mathrm{AHI}\mathrm{reduction}=\left(-0.32\pm 2.97\right)+{\left(0.65\pm 0.06\right)}^{***}\times \mathrm{AHI}\mathrm{before}\mathrm{intervention}$	4.7 e–7
Tension	$\mathrm{AHI}\mathrm{reduction}=\left(4.51\pm 2.50\right)+{\left(0.42\pm 0.08\right)}^{***}\times \mathrm{AHI}\mathrm{before}\mathrm{intervention}$	0.00044
Unchanged	$\mathrm{AHI}\mathrm{reduction}=\left(1.23\pm 1.53\right)+\left(0.10\pm 0.04\right)·\times \mathrm{AHI}\mathrm{before}\mathrm{intervention}$	0.06

The following convention was adopted: 0 “***”; 0.001