. Author manuscript; available in PMC: 2011 Aug 1.

Published in final edited form as: Clin Biomech (Bristol, Avon). 2010 Aug;25(7):693–699. doi: 10.1016/j.clinbiomech.2010.04.016

Table 1.

Means, 95% confidence intervals ( CIs) and correlation coefficients for independent predictor variables used in model development (N=598).

	Mean	95% Confidence Interval for Mean		Surrogate Predictor Variable Correlation to Primary Predictor^**
	Mean	Lower Bound	Upper Bound
Peak Knee Abduction Angle (deg) Knee Valgus Motion (cm)^†	9.62 3.97	9.14 3.79	10.11 4.14	0.42^**
Knee flexion ROM(deg)^*	59.21	58.47	59.95	N/A
BMI Z-score (No. of SD) Mass(kg)^†	0.38 54.06	0.31 53.05	0.46 55.07	0.77^**
Tibia Length (cm)^*	35.89	35.68	36.09	N/A
Peak Knee Extensor Moment (Nm) QuadHam ratio^†	95.37 1.53	93.06 1.50	97.69 1.57	0.21^**

Predictor variables were included in both laboratory-based and clinic-based regression models.

^**

Correlation is significant at the 0.01 level (2-tailed).

^†

Surrogate clinic-based predictors employed in the logistic regression model.