Table 5. Assessment of the reliability of measurements.

Tongue-to-palate distances	First reading (n = 30) Mean ± SD (mm)	Second reading (n = 30) Mean ± SD (mm)	ICC
D1	3.4 ± 1.9	3.6 ± 1.7	0.97
D2	4.1 ± 2.4	4.0 ± 2.3	0.98
D3	5.2 ± 2.5	5.1 ± 2.4	0.98
D4	7.1 ± 3.3	6.9 ± 3.3	0.98
D5	9.2± 5.0	8.7 ± 5.0	0.98
D6	10.9 ± 5.4	10.2 ± 5.5	0.97

n = 30; SD = standard deviation, D= distances. ICC = Intraclass correlation coefficient.

ICC: > 0.75 excellent agreement, 0.4 - 0.75 fair agreement, < 0.4 poor agreement.