Table 4.

Cross tabulation of location of herniated disc and the foraminal zones with stenosis.

Foraminal Zone With Stenosis	Location of Herniated Disc			Total
	Central Herniation	Paracentral Herniation	Central, Paracentral Herniation
Exit zone
Count	0	2	0	2
% within herniated disc	0.0	10.0	0.0	2.3
Mid-zone
Count	9	0	2	11
% within herniated disc	18.4	0.0	10.5	12.5
Exit zone
Count	3	2	1	6
% within herniated disc	6.1	10.0	5.3	6.8
Entry and mid-zone
Count	3	3	2	8
% within herniated disc	6.1	15.0	10.5	9.1
Mid- and exit zone
Count	27	10	8	45
% within herniated disc	55.1	50.0	42.1	51.1
All zones
Count	7	3	6	16
% within herniated disc	14.3	15.0	31.6	18.2
Total
Count	49	20	19	88
% within herniated disc	100.0	100.0	100.0	100.0