Table 1. Demographic data for treatment-resistant depression patients and healthy controls (at baseline).

	Treatment-Resistant Depression Patients (n = 80)	Healthy Controls (n = 37)
Demographic Variables
Age in Years: Mean (Standard Deviation)	41.81 (9.64)	42.57 (10.02)
Gender: % female	73%	73%
Handedness: % right	86%	89%
Baseline Clinical Variables Mean (Standard Deviation)
Hamilton Rating Scale for Depression:	17.83 (3.07)	1.54 (1.40)
Age of Depression Onset:	18.74 (9.57)	--
Duration of Current Episode (months):	79.34 (96.60)	--
Number of Previous Episodes:	3.42 (2.31)	--