Table 1. Intrarater and interrater comparison of the classification of habitual tongue and lip posture.

Variable	Intrarater comparison		Interrater comparison
	kappa	Classification	kappa	Classification
Habitual lip posture	1.0	Almost perfect	0.7667	Substantial
Habitual tongue posture	1.0	Almost perfect	0.7407	Substantial

Kappa test

Caption: Classification: slight (0 to 0.2); fair (0.21 to 0.40); moderate (0.41 to 0.60); substantial (0.61 to 0.80); and almost perfect (0.81 to 1.0)⁽¹⁸⁾