Table 2.

Degenerative lumbar spondylolisthesis and control groups

spinal level	lumbar spondylolisthesis		facet tropism		χ2	p
			YES	NO
L3–4	YES	6	1	5	0.514	0.474
	NO	86	7	79
L4–5	YES	50	17	33	6.125	0.013
	NO	42	5	38
L5-S1	YES	36	18	18	15.571	0.000
	NO	56	7	49