Table 2.

Associations of free-living features with MSFC span.

Category	Feature	Correlation	p-value, q-value
Mobility (gait)	Stance time	−0.56	0.0055, 0.0052
Mobility (turn)	Turn angle—chest	0.44	0.0377, 0.0154
Mobility (gait)	Swing time	−0.39	0.0648, 0.0215
Fatigue/sleep	Mean PVT Delay	−0.55	0.0060, 0.0055
Sleep	Movement rate of legs during sleep	−0.45	0.0398, 0.0154
Sleep	REM percent	0.42	0.0584, 0.0202
Overall activity	Idle minutes	−0.52	0.0110, 0.0074