Table 3.

Criterion validity (concurrent): Mean AMPSIMM and Locomotor Capabilities Index-5 scores and their correlation at six weeks, four months, and 12 months.

	N	AMPSIMM	Locomotor Capabilities Index-5	ra (p-value)
		Mean ±SD	Mean ±SD
Six weeks	92	2.39 ± 1.0	20.1 ± 15.0	0.72 (<0.001)
Four months	89	2.99 ± 1.1	25.2 ± 16.6	0.81 (<0.001)
12 months	82	3.39 ± 1.4	31.9 ± 17.7	0.86 (<0.001)

^aSpearman’s rank correlation coefficient = 0.1 (small); 0.3 (medium), 0.5 (large).