Table 2.

P-values represent the significance of association between the presence of specific histopathology features and their inclusion in the Thompson grade of disc degeneration.

	Rhesus monkeys			Humans
	Whole	Anterior	Posterior	Whole	Anterior	Posterior
Osteophyosis	0.015*	<0.001*	0.051†	<0.001*	0.001*	0.039*
Concentric tears	0.002*	0.051†	0.065†	0.003*	0.060†	0.080†
Radial tears	0.335	0.990	0.344	<0.001*	<0.001*	0.002*
EP rim lesions	<0.001*	<0.001*	0.765	<0.001*	0.034*	<0.001*
Cartilage EP	0.022*	0.002*	0.672	0.227	0.411	0.019*
Inner AF morph.	0.004*	<0.001*	0.032*	<0.001*	<0.001*	<0.001*