Table 2.

	A		B		C		D		E		F		G
	Normal/painful  total		Painful   LBP/+leg pain		Normal/  Spondylolysis Grade 1-2		Normal/  Spondylolysis Grade 3-4		Children/  Spondylolysis  Grade 1-2		Children/  Spondylolysis  Grade 3-4		Spondylolysis  Grade 1-2/3-4
	t		t		t		t		t		t		t
Pelvic incidence (PI)	0.852	NS	3.333	+++	5.468	+++	6.639	+++	7.408	+++	8.17	+++	2.810	++
Jackson's angle (PR-S1)	0.799	NS	3.459	+++	5.423	+++	6.366	+++	6.9	+++	7.682	+++	2.626	++
Length of the upper plate of S1	0.000	NS	1.449	NS	2.749	++	5.596	+++	10.122	+++	2.08	++	4.197	+++
Femoral heads diameter	0.762	NS	1.662	NS	3.291	+++	4.040	+++	9.77	+++	5.433	+++	1.945	NS
Femoral heads diam./Length S1	1.030	NS	0.798	NS	1.142	NS	8.180	+++	3.22	++	11.583	+++	8.175	+++
Sagittal pelvic thickness	0.000	NS	0.873	NS	2.716	++	2.593	++	6.491	+++	2.928	++	0.771	NS
SPT/length of S1	0.182	NS	2.166	+	0.000	NS	2.751	++	0.244	NS	0.286	NS	2.665	++
SPT/femoral heads diameter	0.253	NS	1.193	NS	1.131	NS	1.663	NS	1.989	+	0.717	NS	0.910	NS

Comparisons of the values of the normal, painful, and spondylolysis groups: between the normal and the total painful group (column A), between the painful cases with and without leg spreading (column B), the normal group and the low grade (column C) and high grade (column D) spondylolysis group, between the children and the low (column E) and high grade spondylolysis group (column F), and between the two spondylolysis groups (column G). + for P < 0.05, ++ for P < 0.01, +++ for P < 0.001.