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. 2013 Apr 2;135(4):0410051–0410057. doi: 10.1115/1.4023700

Table 5.

Coefficients of determination and associated p-values for comparisons of measured and predicted values of |E*| and tanδ in aged (P300 and P570) and injured (three and six weeks post-injury at P120) tendons tested at 4%, 6%, and 8% with f = 5 Hz. In all groups, correlations were significant for both parameters at all strain levels.


Evaluation of Model Predictions at 5 Hz

P300 (uninjured)

P570 (uninjured)
Parameter Strain R 2 p Parameter Strain R 2 p
|E*| 4% 0.89 < 0.0001 |E*| 4% 0.96 < 0.0001
6% 0.95 < 0.0001 6% 0.90 < 0.0001
8% 0.85 < 0.0001 8% 0.55 0.002
tanδ 4% 0.59 0.004 tanδ 4% 0.93 < 0.0001
6% 0.53 0.007 6% 0.86 < 0.0001
8% 0.43 0.02 8% 0.69 0.0002

Three weeks post-injury

Six weeks post-injury
Parameter Strain R 2 p Parameter Strain R 2 p
|E*| 4% 0.91 < 0.0001 |E*| 4% 0.84 < 0.0001
6% 0.84 < 0.0001 6% 0.92 < 0.0001
8% 0.53 0.002 8% 0.70 0.0002
tanδ 4% 0.75 < 0.0001 tanδ 4% 0.57 0.002
6% 0.89 < 0.0001 6% 0.83 < 0.0001
8% 0.65 0.0003 8% 0.79 < 0.0001