Table 2

Pearson correlation between mechanical strength, density, osteoarthritis level (K-L Score), and age.

Vertebral Endplate
		K-L Score	Age	Dbulk	Dapp	Dmat	Dopt	Dash
Elem Shear	M	-.364^*	.108	-.364^*	.440^**	.440^**	-.493^**	.337^*
	F	-.614^**	-.677^**	-.635^**	.739^**	.744^**	-.362	.523^**
Glob Shear	M	-.427^**	.009	-.300	.507^**	.507^**	-.395^*	.393^*
	F	-.602^**	-.682^**	-.605^**	.713^**	.719^**	-.330	.506^**
Max Load	M	-.489^**	-.019	-.260	.419^**	.419^**	-.381^*	.321^*
	F	-.602^**	-.670^**	-.592^**	.717^**	.721^**	-.356	.524^**
Vertebral Cancellous Bone
		K-L Score	Age	Dbulk	Dapp	Dmat	Dopt	Dash
Elem Shear	M	-.615^**	-.193	-.059	.368^*	.605^**	-.316	.548^**
	F	-.837^**	-.679^**	-.471^*	.527^**	.811^**	-.546^**	.840^**
Glob Shear	M	-.367^*	-.005	.003	.460^**	.615^**	-.154	.539^**
	F	-.837^**	-.678^**	-.439^*	.544^**	.787^**	-.465^*	.819^**
Max Load	M	-.571^**	-.167	-.069	.437^**	.574^**	-.273	.495^**
	F	-.825^**	-.690^**	-.464^*	.560^**	.815^**	-.506^*	.844^**

Values represent r². Negative sign (-) is for a negative correlation whereas an absence of sign stands for a positive one. M: male; F: female; K-L Score: Kelgren-Lawrence score; Dbulk: bulk density; Dapp: apparent density; Dmat: material density; Dopt: optical density; Dash: ash density.
↵** Correlation is significant at 0.01 at the level (2-tailed).
↵* Correlation is significant at 0.05 at the level (2-tailed).