Table 1.

Gait dynamics in the three subject groups

	Gait Measure	Healthy Controls (n = 18)	Bipolar Disorder (n = 23)	Unipolar Major Depressive Disorder (n = 9)
Mean Values	Stride time (msec)	1120 ± 69	1161 ± 106	1200 ± 94
	Swing Time (%)	37.0 ± 1.6	35.4 ± 2.1	35.8 ± 1.3
	Gait speed (m/sec)	1.21 ± 0.16	1.14 ± 0.20	1.11 ± 0.14
Variability Measures of Unsteadiness	Stride Time CV (%)	2.4 ± 0.6	2.9 ± 1.3	2.6 ± 0.9
	Swing Time CV (%)	1.9 ± 0.3	3.0 ± 1.4*	3.6 ± 1.9*

CV: coefficient of variation

* p < 0.0005 compared to the control group