Table 2. Thyroid volume normal values according to birth weight .

-	Boys Thyroid volume (mL)			Girls Thyroid volume (mL)
Weight (SD)	Mean±SD (median)	-2 SD	+2 SD	Mean±SD (median)	-2 SD	+2 SD
-2-(-1) (n=13)	0.50±0.16 (0.43)	0.18	0.82	0.45±0.17 (0.46)	0.11	0.78
-1-0 (n=32)	0.71±0.23 (0.68)	0.25	1.17	0.62±0.18 (0.62)	0.26	0.98
0-1 (n=23)	0.75±0.23 (0.76)	0.29	1.21	0.72±0.25 (0.73)	0.22	1.22
1-2 (n=5)	0.71±0.19 (0.78)	0.33	1.09	1.19±0.48 (1.31)	0.23	2.15

SD: standard deviation, mL: milliliters