Table 3.

Analysis of time from disease onset to walking with assistance, wheelchair use, and ambulation loss

									Incidence-free proportion
	Mean	SD	95% CI		Median	Interquartile range	95% CI		10 years	20 years
Aassistive device use	12.4	1.3	10.0	14.9	8.0	5.0-13.0	6.3	9.7	0.38	0.18
Wheelchair use	15.2	0.8	13.6	16.9	14.0	8.0-22.0	11.8	16.2	0.64	0.29
Loss of ambulation	21.1	1.4	18.3	23.8	21.0	11.0-37.0	15.4	26.6	0.78	0.51