Table 6.

Coefficients from Pearson and Spearman Rank-Order Tests Examining the Association between Apparent Density Taken from Pooled Groups for Comparison with sGAG Concentration (Biopsy Site 2) and OARSI Histological Parameters.

Pearson	r	Pr (>t)
HU × sGAG	−0.56	0.014*
Spearman	rho	Pr (>t)
HU × PG score	−0.38	0.11
HU × Collagen pathology	0.41	0.044*
HU × Cartilage structure	0.13	0.31

HU, Hounsfield units; OARSI, Osteoarthritis Research Society International; sGAG = sulfated glycosaminoglycan; PG = proteoglycan.

^*P < 0.05.