Table 1.

Demographic and Clinical Characteristics of Patients with Bipolar Disorder at Intake into the Collaborative Depression Study (N=199)

Characteristic	N	%
Gender
Female	122	61.3
Male	77	38.7
Marital status
Never married	70	35.2
Married	77	38.7
Divorced, separated, or widowed	52	26.1
Hollingshead socioeconomic status scalea
I	4	2.0
II	28	14.1
III	68	34.2
IV	56	28.1
V	43	21.6
Intake site
New York	31	15.6
St. Louis	41	20.6
Boston	29	14.6
Iowa City	56	28.1
Chicago	42	21.1
Intake status
Inpatient	178	89.4
Outpatient	21	10.6
Major depressive episodes before study intake
0	43	21.6
1	32	16.1
2	30	15.1
3	19	9.5
4	17	8.5
5 or more	58	29.1
Manic episodes prior to study intake
0	93	46.7
1	30	15.1
2	21	10.6
3 or more	55	27.6
	Mean	SD
Global Assessment Scale score	32.2	11.1
Hamilton Depression Rating Scaleb	25.5	8.2
Age (years)	36.7	12.9
Duration of follow-up (years)	21.0	8.2

^aThe scale ranges from 1 (higher status) to V (lower status).

^b17-item version, extracted from the Schedule for Affective Disorders and Schizophrenia; see ref #32