Table 1:

Baseline demographic data stratified by overall response to ECT treatment

	Never-Responders	Responders	Overall
	(N, %)	(N, %)	(N, %)
N	747	952	1699
Age (mean (SD)), years	43.36 (15.68)	46.11 (16.20)	44.9 (16.03)
Sex (Female)	448 (59.97)	565 (59.35)	1013 (59.62)
Race
White	683 (91.43)	876 (92.02)	1559 (91.76)
American Indian / Alaskan Native	4 (0.54)	12 (1.26)	16 (0.94)
Asian	20 (2.68)	30 (3.15)	50 (2.94)
Black	13 (1.74)	17 (1.79)	30 (1.77)
Native Hawaiian / Pacific Islander	0 (0.00)	0 (0.00)	0 (0.00)
Other / Unknown	4 (0.54)	12 (1.26)	16 (0.94)
Ethnicity
Latino/Latina	12 (1.61)	21 (2.21)	33 (1.94)
Missing	370 (49.53)	498 (52.31)	868 (51.09)
Employment in past 30 days
Full-time	114 (15.26)	115 (12.08)	229 (13.48)
Part-time	52 (6.96)	56 (5.88)	108 (6.36)
None	449 (60.11)	578 (60.71)	1027 (60.45)
Student (yes)	109 (14.59)	112 (11.76)	221 (13.01)
On disability (yes)	228 (30.52)	252 (26.47)	480 (28.25)
Education
8th Grade or Less	2 (0.27)	3 (0.32)	5 (0.29)
Some high school	28 (3.75)	22 (2.31)	50 (2.94)
High school graduate/GED	87 (11.65)	92 (9.66)	179 (10.54)
Some college	218 (29.18)	267 (28.05)	485 (28.55)
4-year college graduate	179 (23.96)	256 (26.89)	435 (25.60)
Post-college education	226 (30.25)	304 (31.93)	530 (31.19)
Subjective Physical Health
Very poor	12 (1.61)	13 (1.37)	25 (1.47)
Poor	114 (15.26)	120 (12.61)	234 (13.77)
Good	419 (56.09)	538 (56.51)	957 (56.33)
Very Good	157 (21.02)	219 (23.00)	376 (22.13)
Excellent	38 (5.09)	56 (5.88)	94 (5.53)
Ever been homeless (yes)	59 (7.90)	60 (6.30)	119 (7.00)
Initial Treatment Location
Inpatient	457 (61.18)	671 (70.48)	1128 (66.39)
Outpatient	280 (37.48)	274 (28.78)	554 (32.61)
Clinical Diagnosis
Major depressive disorder	593 (79.38)	745 (78.26)	1338 (78.75)
Bipolar affective disorder	154 (20.62)	207 (21.74)	361 (21.25)
ECT electrode placement (baseline)
Unilateral	726 (97.19)	926 (97.27)	1652 (97.23)
Bitemporal/Bifrontal	21 (2.81)	26 (2.73)	47 (2.77)
ECT pulse width (baseline)
Brief pulse (0.5–2 ms)	37 (4.95)	63 (6.62)	100 (5.89)
Ultrabrief pulse (<0.5 ms)	710 (95.05)	889 (93.38)	1599 (94.11)
Baseline QIDS Score (Mean (SD))	18.2 (3.83)	18.3 (3.72)	18.3 (3.77)