Relationship between biological factors and catastrophizing and clinical outcomes for female patients with knee osteoarthritis

Table 4 Multiple linear regression analysis of factors associated with each outcome

Outcome	Independent variables	R2	Unstandardized coefficients: B	95%CI for B	β	P-value
Pain rating		0.397
	BMI		0.162	0.039-0.284	0.239	0.010
	PCS		0.139	0.093-0.184	0.555	< 0.001
TUG		0.431
	K-L grade		0.638	0.419-0.856	0.52	< 0.001
	PCS		0.053	0.023-0.082	0.313	0.001
JKOM		0.492
	K-L grade		4.556	2.737-6.374	0.421	< 0.001
	PCS		0.719	0.470-0.968	0.485	< 0.001

TUG: Timed up and go test; JKOM: Japanese Knee Osteoarthritis Measure; BMI: Body mass index; K-L grade: Kellgren-Lawrence grading system; PCS: Pain Catastrophizing Scale.