Table 2. Differences in Step Time Variability in the Virtual Reality gait task (STV^VR) between Freezers and Non-freezers and between the ‘Off’ and ‘On’ states.

		STVVR Median - Range	STVVR Median - Range	p-value
Group effect		Freezers (n = 17)	Non-freezers (n = 11)
	‘Off’	24.5–69.8	15.6–19.7	p = 0.032
	‘On’	13.5–48.4	11.8–15.7	p = 0.125
Medication		‘Off’	‘On’
	Freezers (n = 17)	24.5–69.8	13.5–48.4	p = 0.018
	Non-freezers (n = 11)	15.6–19.7	11.8–15.7	p = 0.017

NOTE: Medication = differences between STV^VR in the ‘Off’ and ‘On’ medication states.