. Author manuscript; available in PMC: 2009 Sep 17.

Published in final edited form as: Spine (Phila Pa 1976). 2008 Apr 20;33(9):991–998. doi: 10.1097/BRS.0b013e31816c8379

Table 3. Quantitative Measurements by Reader^*.

Characteristic	Reader E Mean (SD)^†	Reader F Mean (SD)^†	P
Bony canal area at disc level	421 (142)	377 (129)	0.006
Soft tissue canal area at disc level	225 (87)	233 (85)	0.434
Thecal sac area at disc level	141 (66)	148 (62)	0.306
Thecal sac area at pedicle level above	186 (73)	185 (78)	0.958
Disk fragment area	106 (53)	76 (56)	0.007
Max AP disc fragment length	8.9 (3.0)	6.3 (2.7)	<0.001

n = 50 images; 150 levels.

^†

Lengths were measured in mm, areas in mm².

Table 3. Quantitative Measurements by Reader*.