Table 2.

Leg and Trunk Impairments Predicting Frequency of Participation in Life Roles Mediated by Changes in Activities Over 2 Years

Variable	Beta Coefficient (95% CI)
	Direct Effect	Indirect Effect	Total
Changes in lower-extremity activities	0.82 (0.28 to 1.93)*	—	—
Ankle ROM	0.96 (−0.63 to 2.96)	−1.06 (−3.56 to −0.07)*	−0.10 (−1.29 to 1.11)
Leg speed	1.39 (0.05 to 3.28)*	−0.52 (−2.4 to 0.47)	0.86 (−0.25 to 2.00)
Trunk extensor endurance	−0.32 (−2.4 to 1.03)	1.01 (0.05 to 3.50)*	0.68 (−0.36 to 1.78)

Notes: Models adjusted for baseline participation, age, and sex. Coefficients are presented for physical impairment test performance above the median. Participation and activity score range: 0–100; higher is better. ROM = range of motion.

*95% CI does not contain 0