Table 2. Preferred and alternative outcome(s).

BESS Balance error scoring system, CoP Center of Pressure, FR Functional-Reach test, LOS Limits of stability SOT Sensory Organization Test, TUG Timed up and go test.

Category	Preferred outcome	Alternative outcome(s)
Static steady-state balance	CoP displacements during single-leg stance	time in balance SOT BESS Balance Index
Dynamic steady-state balance	gait speed during walking	cadence body sway body accelerations LOS
Proactive balance	reach distance during FR	TUG Star excursion balance test CoP displacements during self-perturbed stance Timed up and down stairs test
Reactive balance	CoP displacements during perturbed stance	-