Table 2. Analysis of the A-P diameter of the intervertebral disk.

IV SPACE	Before loading		Loaded		Z	p
	Median	IQ range	Median	IQ range
L3/L4	41,4	39,2-44,2	42,3	39,7-45,1	-7,629	<0.001
L4/L5	43,1	39,8-46,5	44,4	40,8-47,6	-7,479	<0.001
L5/S1	41,2	37,8-44,2	42,3	39,6-45,4	-7,248	<0.001