TABLE 3.

Average T10 vertebra measurements for four age groups.

	P7	P9	P14	Adult
Length of T10 (mm)	1.95 ± 0.48	2.08 ± 0.31	2.20 ± 0.29	5.38 ± 0.38*
Width of spinal canal (mm)	1.86 ± 0.12	1.62 ± 0.12**	2.28 ± 0.18	2.69 ± 0.11*
Height of spinal canal (mm)	1.40 ± 0.18	1.30 ± 0.12***	1.66 ± 0.11	2.38 ± 0.28*
Area of spinal cord (mm2)	2.20 ± 0.27	2.03 ± 0.22	2.71 ± 0.21	5.48 ± 0.76*
Area of spinal canal (mm2)	2.92 ± 0.35	2.74 ± 0.26	3.55 ± 0.45	6.93 ± 0.78*
% Spinal cord within spinal canal	79 ± 0.05	76 ± 0.05	74 ± 0.08	75 ± 0.05

^* p < 0.0001 compared to each of the neonatal rat age groups.

^** p < 0.05 compared to P9 and P14.

^*** p < 0.05 compared to P14.