Table 3.

Longitudinal mixed model analyses examining the association of demographic, pain, sports and recreation activity limitations, fear of re-injury and personal importance of exercise on subsequent time spent in walking, household activities, lower and higher risk for knee injury physical activities.

	Walking	Household activities	Lower risk for knee injury physical activities	Higher risk for knee injury physical activities
	β (SE)	β (SE)	β (SE)	β (SE)
Age	−2.64 (3.98)	5.49 (2.55)*	−5.78 (2.08)**	−2.58 (0.96)**
Gender	1.39 (55.41)	48.86 (35.56)	−0.81 (29.84)	−21.93 (13.91)
Body mass index	−1.81 (7.13)	−3.44 (4.51)	4.83 (3.62)	0.75 (1.77)
Pain	−0.46 (1.82)	0.30 (1.11)	1.23 (0.70)	0.47 (0.36)
Sports and recreation activity limitations	0.94 (0.98)	1.10 (0.60)	−0.12 (0.37)	0.43 (0.27)
Mean fear of re-injury	−0.29 (1.15)	0.82 (0.74)	−0.76 (0.59)	−0.27 (0.29)
Change in fear of re-injury	0.66 (0.96)	1.04 (0.56)	−024 (0.35)	−0.72 (0.22)**
Mean personal importance of exercise	3.68 (4.04)	−2.37 (2.59)	10.75 (2.23)**	3.84 (1.02)**
Change in personal importance of exercise	2.46 (6.01)	11.67 (3.52)**	0.62 (2.28)	−0.28 (1.43)

Note: β = standardized regression coefficient; SE = standard errors; *p < .05; **p < .01

Coefficients were estimated using REML under PROC MIXED, SAS 9.2.