Table 7: Number of Z joints with osteophytes per animal*

Table 7

Number of Z joints with osteophytes per animal * *

Weeks released Controls (SD) 1 week (SD) 4 week (SD) 8 week (SD)

0 N/A 2.5 (0.7) 3.7 (0.6) 4.0 (N/A)

1 0.8 (1.0) 2.0 (0.0) 2.3 (1.5) 3.7 (0.6)

2 1.5 (1.7) 2.0 (1.7) 2.0 (1.7) 4.0 (0.0)

4 1.5 (1.0) 2.3 (1.5) 1.7 (0.6) 4.0 (0.0)

8 3.0 (1.0) 3.0 (0.8) 3.0 (1.2) 3.7 (0.6)

12 1.8 (1.7) 2.0 (1.7) 3.0 (1.7) 4.0 (0.0)

16 2.3 (2.1) N/A N/A N/A

Average 1.7 (1.5) 2.3 (1.1) 2.6 (1.3) 3.9 (0.3)

Degeneration occurrence parameter-total possible = 4.0.

N/A, Data not available (ie, no subgroups of animals for these cells; no SD for 8-week fixation, 0 weeks released because only 1 animal in this subgroup); KW, Kruskal-Wallis statistic.

*A significant difference was found among groups (KW = 25.87, P < .0001).

Weeks released	Controls (SD)	1 week (SD)	4 week (SD)	8 week (SD)


0	N/A	2.5 (0.7)	3.7 (0.6)	4.0 (N/A)

1	0.8 (1.0)	2.0 (0.0)	2.3 (1.5)	3.7 (0.6)

2	1.5 (1.7)	2.0 (1.7)	2.0 (1.7)	4.0 (0.0)

4	1.5 (1.0)	2.3 (1.5)	1.7 (0.6)	4.0 (0.0)

8	3.0 (1.0)	3.0 (0.8)	3.0 (1.2)	3.7 (0.6)

12	1.8 (1.7)	2.0 (1.7)	3.0 (1.7)	4.0 (0.0)

16	2.3 (2.1)	N/A	N/A	N/A

Average	1.7 (1.5)	2.3 (1.1)	2.6 (1.3)	3.9 (0.3)