Table 1.

Association between depressive symptoms measured by the GDS and individual gait variables

	Linear Regression Model 1‡				Linear Regression Model 2§
Outcome Variable	GDS Coefficient	Lower CI	Upper CI	P value	GDS Coefficient	Lower CI	Upper CI	P value
Velocity, cm/s	−2.98	(−3.85 to	−2.10)	<0.001†	−1.17	(−2.05 to	−0.30)	0.01†
Stride Length, cm	−2.39	(−3.14 to	−1.64)	<0.001†	−0.95	(−1.69 to	−0.21)	0.01†
Cadence, steps/min	−1.17	(−1.66 to	−0.68)	<0.001†	−0.45	(−0.99 to	0.09)	0.1
Stance Time, seconds	0.01	(0.01 to	0.02)	<0.001†	0.004	(−0.003 to	0.01)	0.29
Swing Time, seconds	0.003	(0.001 to	0.005)	0.01†	0.002	(−0.001 to	0.004)	0.17
Double Support Time, seconds	0.01	(0.01 to	0.02)	<0.001†	0.003	(−0.004 to	0.01)	0.36
Stride Length Variability, log SD	0.02	(−0.01 to	0.04)	0.15	0.01	(−0.02 to	0.03)	0.51
Swing Time Variability, log SD	0.06	(0.04 to	0.09)	<0.001†	0.03	(0.002 to	0.06)	0.03

^†Indicates significant P-value (<0.05) after applying correction for multiple comparisons (see Methods for description).

^‡Linear regression model adjusted for baseline gds, age, sex, race, and education; p-value for variables are derived from t-statistic and has 603 residual degrees of freedom

^§Linear regression model additionally adjusted for medical illness index, presence of clinical gait abnormalities, Blessed-Information-Memory-Concentration test score, mean arterial pressure, body mass index, physical activity scale score, and psychotropic use; 489 residual degrees of freedom