Table 3.

Construct validity. Spearman's correlation coefficients (r_S) determined when comparing KOOS' five subscales to the SF-36 eight different subscales. N = 103-105 with the exception of Sport/Rec where n = 58.

SF-36 subscale	Physical Health†	Mental Health†	KOOS Pain	KOOS Symptoms	KOOS ADL	KOOS Sport/Rec	KOOS QOL
Physical Function	Strong	Weak	0.19	0.20*	0.48***	0.11	0.34***
Role Physical	Strong	Weak	0.16	0.06	0.26**	-0.06	0.10
Bodily Pain	Strong	Weak	0.62***	0.37***	0.68***	0.34*	0.60***
General Health	Moderate	Moderate	0.16	0.08	0.29**	-0.1	0.07
Vitality	Moderate	Moderate	0.38***	0.30**	0.50***	0.24	0.33***
Social Functioning	Moderate	Strong	0.26**	0.14	0.39***	0.12	0.40***
Role Emotional	Weak	Strong	0.12	0.09	0.36***	0.24	0.06
Mental Health	Weak	Strong	0.14	0.05	0.28**	0.09	0.10

† SF-36 subscales ability to measure physical health vs. mental health [17]