. 2002 May;200(5):439–443. doi: 10.1046/j.1469-7580.2002.00048.x

Table 2.

Regression equations for area and volume of the spinal canal relative to gestational age. GA, gestational age; L, lumbar vertebra; SE, standard error; r, multiple regression coefficient; P, significance of regression

	Regression equation	SE	r	P
Area L1	−0.09575 + 0.000689 * ga²	0.34853	0.9502	0.0001
Volume L1	−0.1687 + 0.000670 * ga²	0.33066	0.9513	0.0001
Area L3	−0.08553 + 0.000644 * ga²	0.30997	0.9483	0.0001
Volume L3	−0.1533 + 0.000593 * ga²	0.24307	0.9126	0.0001
Area L5	−0.07620 + 0.000614 * ga²	0.30157	0.9329	0.0001
Volume L5	−0.1455 ± 0.000567 * ga²	0.27505	0.9046	0.0001