TABLE 2.

Results from Multiple Linear Regression. Unstandardized regression coefficients (95 % confidence Intevals), Standardized regression coefficients (in standard deviations) and P values.

		Quadriceps intramuscular fat fraction				Quadriceps Lean ACSA
		Unstandardized Regression Coefficient	95 % Confidence Intervals	Standardized Regression Coefficient	P value	Unstandardized Regression Coefficient	95 % Confidence Intervals	Standardized Regression Coefficient	P value
KOOS	Symptoms	−2.25	−3.75, −0.74	−0.34	0.004	−0.06	−0.49, 0.36	−4.00	0.771
	Pain	−2.64	−4.43, −0.84	−0.32	0.004	0.07	−0.44, 0.57	3.39	0.802
	ADL	−3.31	−4.71, −1.90	−0.47	<0.001	0.15	−0.25,0.55	9.27	0.452
6 Minute Walk Test		−11.79	−21.70, −1.87	−0.24	0.021	4.0	1.62,6.37	38.01	0.001
Stair Climbing Test		0.66	0.38, 0.95	0.47	<0.001	−0.04	−0.10, 0.03	−12.78	0.293
Quadriceps Isometric Torque		−3.09	−7.18, 1.0	−0.17	0.135	1.39	0.53, 2.25	43.22	0.002

KOOS = Knee injury and Osteoarthritis Outcome Score; ADL = Activities of Daily Living; ACSA = Anatomical Cross-sectional Area