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. Author manuscript; available in PMC: 2012 Jul 1.
Published in final edited form as: Osteoarthritis Cartilage. 2011 Mar 11;19(7):801–808. doi: 10.1016/j.joca.2011.03.003

Table 2.

Coefficients (95% confidence interval) and p-values for the hierarchical random-effects models for rotations. The quadratic and random slope terms (β2 and β4, respectively) were included in the model when significant. NS = not significant.

Coefficients Flexion Spin Tilt
β0
(y-intercept, °)		 −12.83 (−15.43, −10.23)
p < 0.001		 −5.83 (−7.03, −4.63)
p < 0.001		 7.60 (2.72, 12.48)
p = 0.002
β1
(slope, ° / ° knee flexion)		 0.459 (0.385, 0.534)
p < 0.001		 0.089 (0.072, 0.105)
p < 0.001		 0.131 (0.052, 0.211)
p = 0.001
β2
(quadratic, ° / ° knee flexion2)		 0.0041(0.0033, 0.0050)
p < 0.001		 NS −0.0016 (−0.0025, −0.0006)
p = 0.001
β3:
(random intercept by condition, °)
  0% load: no brace vs brace −3.88 (−4.82, −2.94)
p<0.001		 −0.43 (−0.90, 0.04)
p = 0.071		 1.11 (0.54, 1.68)
p < 0.001
  15% load: no brace vs brace −3.60 (−4.51, −2.68)
p<0.001		 −0.62 (−1.10, −0.15)
p = 0.010		 0.85 (0.27, 1.43)
p = 0.004
  No brace: 0% load vs 15% load −0.23 (−1.15, 0.69)
p=0.626		 0.02 (−0.46, 0.49)
p = 0.944		 −0.06 (−0.64, 0.51)
p = 0.832
  Brace: 0% load vs 15% load 0.05 (0.98, −0.88)
p=0.913		 −0.18 (−0.65, 0.29)
p = 0.460		 −0.32 (−0.89, 0.25)
p = 0.274
β4:
(random slope by condition, ° / ° knee flexion)
  0% load: no brace vs brace 0.062 (0.030, 0.094)
p < 0.001		 NS NS
  15% load: no brace vs brace 0.060 (0.028, 0.092)
p<0.001		 NS NS
  No brace: 0% load vs 15% load 0.004 (−0.029, 0.036)
p = 0.834		 NS NS
  Brace: 0% load vs 15% load 0.002 (−0.030, 0.033)
p = 0.907		 NS NS