Correlation between dental arch form and OSA severity in adult patients: an observational study

Progress in Orthodontics

Table 4 Spearman's rank correlation coefficient

	Palatal height	Upper inter-molar distance	Anterior width of upper arch	Posterior width of upper arch	Anterior width of lower arch	Posterior width of lower arch	Length of the upper arch	Length of the lower arch	ODI	AHI	Palatal area
Palatal height		− 0.014°	0.0465°	0.009°	0.105°	− 0.026°	0.184°	− 0.221°	− 0.323**	− 0.147°	0.182°
Upper inter-molar distance	− 0.014°		0.518**	0.920**	0.187°	0.628**	− 0.008°	0.075°	0.044°	− 0.093°	0.234°
Anterior width of upper arch	0.047°	0.518**		0.435**	0.413**	0.398**	0.176°	0.136°	− 0.065°	− 0.114°	0.391**
Posterior width of upper arch	0.009°	0.920**	0.4351**		0.196°	0.615**	− 0.002°	0.049°	0.130°	− 0.014°	0.184°
Anterior width of lower arch	0.105°	0.187°	0.413**	0.196°		0.337**	0.491**	− 0.004°	− 0.323**	− 0.419**	0.396**
Posterior width of lower arch	− 0.026°	0.628**	0.398**	0.615**	0.337**		0.024°	0.105°	0.097°	− 0.026°	0.310*
Length of the upper arch	0.184°	− 0.008°	0.176°	− 0.002°	0.491**	0.024°		0.051°	− 0.559**	− 0.439**	0.376**
Length of the lower arch	− 0.221°	0.075°	0.136°	0.050°	− 0.004°	0.105°	0.051°		0.184°	0.092°	0.075°
ODI	− 0.323**	0.0441°	− 0.065°	0.130°	− 0.323**	0.097°	− 0.559**	0.184°		0.683**	− 0.330**
AHI	− 0.147°	− 0.093°	− 0.114°	− 0.0138°	− 0.420**	− 0.026°	− 0.439**	0.092°	0.683**		− 0.167°
Palatal area	0.182°	0.234°	0.391**	0.184°	0.396**	0.310*	0.376**	0.075°	− 0.330**	− 0.167°