Table 1.

Comparisons of experimental setup and analysis between gait-slip and sit-to-stand-slip tasks

		Gait-slip	Sit-to-stand-slip
Tasks		After ~10 walking trials, the 1st unannounced slip	After ~4 regular trials, the 1st unannounced slip
Release mechanisms		Pre-released movable platform prior to foot contact	Both movable platforms were released at seat-off
Maximum allowed slip distance		1.50 m	0.24 m
Slip outcome classification criterion	Fall	Peak harness force ≥ 30% bw†	Peak harness force ≥ 30% bw
	Recovery	Average harness force < 4.5% bw over any 1-second period	Average harness force < 4.5% bw over any 1-second period
	Harness-affected	None of above	None of above
Slip outcome (total n = 67 for gait; and n = 60 for sit-to-stand)	Single-step fall	9 or [9/(9+4+44)=16%]	9 or [9/(9+3+32)=20%]
	Multi-step fall	4 or [4/(9+4+44)=7%]	3 or [3/(9+3+32)=7%]
	Recovery	44 or [44/(9+4+44)=77%]	32 or [3/(9+3+32)=73%]
	Harness-affected	5	6
	Excluded*	5	10

^†body weight

^*the exclusive criteria include missing data or trigging problem..