Table 4.

Means and standard deviations for subgroups.

Group	Pharyngeal depth	Velar length	VP ratio	Effective velar length	Effective VP ratio	Adenoid depth	Adenoid thickness	Adenoid height	Adenoid area
4–7 months	11.79 ± 3.43	18.31 ± 2.56	1.70 ± .65	7.34 ± 1.37	.67 ± .20	7.85 ± 3.28	6.40 ± 1.12	15.26 ± 2.38	488.46 ± 78.51
8–11 months	11.23 ± 5.28	22.10 ± 1.76	2.32 ± .93	8.92 ± .72	.93 ± .39	12.56 ± 3.42	9.23 ± 2.17	20.78 ± 3.35	542.96 ± 97.95
12–15 months	13.93 ± 5.04	19.94 ± 3.80	1.68 ± .89	8.83 ± 1.54	.76 ± .45	10.05 ± 4.46	9.32 ± 1.51	19.51 ± 3.42	591.00 ± 121.64
16–19 months	8.43 ± 2.81	20.97 ± 2.12	2.82 ± 1.05	9.28 ± 1.59	1.22 ± .49	15.41 ± 2.69	11.31 ± 1.28	22.21 ± 3.60	629.67 ± 119.48
20–23 months	10.50 ± 4.11	20.66 ± 4.87	2.17 ± .82	8.68 ± 1.07	.93 ± .41	12.40 ± 3.97	10.11 ± 1.57	21.56 ± 2.51	625.73 ± 155.84
4–5 years	14.66 ± 4.36	25.60 ± 3.45	1.88 ± .55	11.47 ± 2.71	.85 ± .32	11.21 ± 3.94	12.89 ± 3.58	26.22 ± 3.27	675.77 ± 320.69
6–7 years	18.43 ± 4.26	26.62 ± 4.65	1.50 ± .54	11.74 ± 2.54	.67 ± .21	9.39 ± 5.84	13.02 ± 3.02	26.43 ± 5.10	724.66 ± 228.19
8–9 years	17.47 ± 5.13	28.66 ± 4.59	1.85 ± .93	12.50 ± 2.44	.80 ± .38	10.94 ± 5.81	14.29 ± 4.39	26.89 ± 7.30	539.18 ± 219.12
10–14 years	19.36 ± 4.11	27.91 ± 3.42	1.51 ± .38	12.26 ± 2.43	.66 ± .19	7.76 ± 5.01	11.31 ± 4.47	22.82 ± 7.78	501.02 ± 233.73
15–19 years	22.38 ± 4.56	32.33 ± 5.11	1.51 ± .45	13.04 ± 3.48	.60 ± .18	6.48 ± 5.87	9.26 ± 4.47	21.83 ± 7.93	489.26 ± 261.09
20–24 years	19.92 ± 3.72	34.49 ± 4.56	1.79 ± .42	13.07 ± 3.03	.68 ± .20	5.76 ± 4.07	10.37 ± 4.63	22.08 ± 6.94	369.84 ± 200.32
25 + years	24.19 ± 3.79	36.03 ± 5.44	1.53 ± .37	15.82 ± 3.98	.66 ± .13	3.28 ± 2.34	7.05 ± 3.19	17.99 ± 6.42	220.75 ± 120.17

Note. All distance measurements are in the unit of millimeter. Area measurement is in the unit of millimeter². VP = velopharyngeal.