Table 2

Repeated measures, two way analysis of variance of the results from (A) µMRI measurements, (B) PLM measurements, and (C) mechanical indentation of control and OA specimens (n = 18)

ParameterInteraction (p value)Location (p value)Disease (p value)
NS indicates not statistically significant and the star symbol (*) indicates that the p value of a single factor is ignored if the interaction is significant (p<0.05).
(A) μMRI measurements
Total thickness<0.05**
Relative thickness of superficial zoneNSNS<0.01
Relative depth of max T2<0.05**
T2 at the superficial zoneNSNSNS
“Bulk” T2 at ~0°NSNSNS
(b) PLM measurements
Total thickness<0.05**
Relative thickness of superficial zoneNSNS<0.05
Relative depth of min retardanceNSNS<0.05
Retardance at the superficial zoneNSNS<0.01
Average orientation difference (°)<0.01**
(C) Mechanical indentation
Tangent Young’s modulusNSNS<0.01