Table 4. Results from Multiple Regression Analysis of WOMAC-SF^*.

Variable	WOMAC-SF_pain(95%CI)				WOMAC-SF_function(95%CI)
	B	Lower	Upper	p value	B	Lower	Upper	p value
RKOA (K/L grade 2–4/0–1)	8.400	5.543	11.258	<0.001	7.528	4.909	10.146	<0.001

WOMAC-SF, Western Ontario and McMaster Universities Arthritis Index short-form; RKOA, radiology-confirmed knee osteoarthritis; K/L,Kellgren-Lawrence.

^*Adjusted for gender, age, spouse, smoking, drinking, appendicular skeletal muscle mass, grip strength, osteoporosis, mini nutritional assessment.