Table 3.

Thyroid Volume Assessment in Total Cohort, Each Sex, and Four Age Groups After Adjustment for Sex, Age, and Sex-Age-Specific Body Surface Area

	Normal controls (mL)	n	Hemiagenesis (mL)	n	p
All
Right	3.06 ± 1.08a	292,398	4.75 ± 1.10b	54	<0.001
Left	2.52 ± 1.08	292,440	3.90 ± 0.97c	12	<0.001
Female
Right	3.00 ± 1.14	144,847	4.94 ± 1.10	30	<0.001
Left	2.49 ± 1.14	144,867	4.30 ± 0.95	10	<0.001
Male
Right	3.12 ± 1.15	147,551	4.54 ± 1.08	24	<0.001
Left	2.55 ± 0.77	147,573	2.01 ± 0.95	2	—d
0–6 years
Right	1.29 ± 0.52	68,249	1.80 ± 0.46	21	<0.001
Left	1.10 ± 0.52	68,268	1.85 ± 0.40	2	—
7–11 years
Right	2.53 ± 0.89	88,338	4.23 ± 0.82	10	<0.001
Left	2.06 ± 0.59	88,345	3.98 ± 0.73	3	<0.001
12–16 years
Right	4.06 ± 1.18	87,706	5.82 ± 1.32	16	<0.001
Left	3.32 ± 1.18	87,717	5.54 ± 1.14	5	<0.001
17–23 years
Right	4.72 ± 1.54	48,105	9.82 ± 1.59	7	<0.001
Left	3.91 ± 1.32	48,110	3.11 ± 1.39	2	-

^aData are shown as mean ± standard deviation.

^bValues were obtained from subjects with left hemiagenesis.

^cValues were obtained from subjects with right hemiagenesis.

^dBecause the sample number was <3, the p-value was not calculated.