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. Author manuscript; available in PMC: 2008 Oct 1.
Published in final edited form as: Osteoarthritis Cartilage. 2007 May 31;15(10):1134–1140. doi: 10.1016/j.joca.2007.03.024

TABLE 4.

Muri per force models

  B-Coefficient
 Std. Error
 P-Value
(Intercept) 0.294 0.025 <.0001
Kellgren & Lawrence Grade Main Effect      
          Grade 1 −0.019 0.036 0.5914
          Grade 2 −0.018 0.024 0.4593
         Grade 3 0.012 0.013 0.3793
          Grade 4 0.066 0.014 0.0001
Percent (%) MVIC Main Effect      
          20% −0.142 0.011 <.0001
          30% −0.080 0.005 <.0001
          50% −0.059 0.003 <.0001
Interactive Effects Between KL Grade and % MVIC      
          KL Grade 1      
          * 20% 0.005 0.016 0.7177
          * 30% 0.007 0.007 0.3379
          * 50% 0.004 0.004 0.3370
KL Grade 2      
          * 20% 0.008 0.009 0.3234
          * 30% 0.001 0.004 0.6818
          * 50% 0.002 0.003 0.3832
KL Grade 3      
          * 20% −0.011 0.005 0.0287
          * 30% −0.004 0.002 0.0824
          * 50% −0.004 0.001 0.0074
KL Grade 4      
          * 20% −0.029 0.007 <.0001
          * 30% −0.022 0.003 <.0001
          * 50% 0.013 0.001 <.0001