Table 1.

Effect of degenerative grade (1-4) on average motion parameters (mean of 3 loading rates)

	P value	differences
TZ	0.0123	1 and 3 or 4
TZ slope U	0.0007	1 and 2, 3 or 4
TZ slope L	0.0030	1 and 2, 3, or 4
ROM	0.0010	1 and 3 or 4
		2 and 4
H Width	0.0494	none*
H Area	0.0040	1 and 3 or 4
		2 and 3 or 4

TZ = transitional zone, TZ slope U = transitional zone slope upper arm, TZ slope L = transitional zone slope lower arm, ROM = range of motion, H Width = width of the hysteresis loop at 0 load, H Area = area within hysteresis loop.

P values from one way ANOVA of average parameter (specimen mean of value for the 3 loading rates, n = 15).

Pair-wise differences between grades based on post hoc Tukey-Kramer tests.

^*No differences between grade pairs on post hoc Tukey-Kramer tests despite P value <0.05