Comparison of predictive value of (i) the full model which comprised CoP ML-SD and conventional measures (demographic and knee variables) and (ii) two nested models which comprised CoP ML-SD or conventional measures.

<p>The predictive value is represented by the likelihood ratio <i>χ</i>² statistic. The model comprising CoP ML-SD alone had 44% of the explanatory power of the full model. Put otherwise, nearly half the prognostic information of the full model (comprising conventional and ML-SD variables) may be attributed to ML-SD. Furthermore, ML-SD added statistically significant predictive information (<i>P</i><0.001) to a model that comprised only conventional measures.