Table 4

Backward stepwise regression in blocks for associations with KOOS Sport/Rec

			Regression
Variables	Adjusted R²	R²	coefficient (β)	95% CI	p Value
KOOS Sport/Rec	0.113	0.137
Person characteristics		0.094			<0.001
Age		0.027	−0.23	(−0.39 to −0.07)	0.005
Sex, female		0.058	−8.98	(−12.89 to −5.07)	<0.001
BMI		0.009	−0.40	(−0.84 to 0.05)	0.081
Other findings at arthroscopy		0.043			0.013
Synovitis		0.030			0.011
None			Reference
Irritation/redness			−3.50	(−10.63 to 3.63)
Mild synovitis			−6.05	(−10.85 to −1.25)
Moderate synovitis			−9.00	(−15.99 to −2.01)
Severe synovitis			−11.21	(−21.04 to −1.39)
ACL rupture		0.001			0.800
Intact			Reference
Partial rupture (non-reconstructed)			−3.43	(−14.29 to 7.43)
Total rupture (non-reconstructed)			0.38	(−9.48 to 10.24)
Plica		0.001			0.493
No			Reference
Yes			1.40	(−2.61 to 5.42)
Knee joint laxity (surgeon assessed)		0.010			0.259
No laxity			Reference
Slight laxity			−5.61	(−12.98 to 1.76)
Pronounced laxity			−7.48	(−20.64 to 5.68)
Model intercept			54.9	(40.8 to 69.0)

Elimination criteria p≤0.10.
Stepwise elimination of blocks of independent variables: previous meniscus surgery (p=0.575), cartilage pathology (p=0.407), meniscal pathology (p=0.339).
Individual R² values may not add up to total R² due to rounding.
BMI, body mass index; KOOS, Knee Injury and Osteoarthritis Outcome Score; Sport/Rec, sport and recreation.