Table 2.
Clinical and sociodemographic features of patients endorsing or not endorsing two or more mixed features
| Feature | Zero or one mixed symptoms | Two or more mixed symptoms | χ2 | t | p | ||||
|---|---|---|---|---|---|---|---|---|---|
| n | (%) | Mean (s.d..) | n | (%) | Mean (s.d.) | ||||
| Sex, male | 743 | (38) | 162 | (36) | 0.66 | 0.42 | |||
| Care setting, primary | 841 | (43) | 206 | (46) | 1.09 | 0.30 | |||
| Race, white | 1539 | (79) | 328 | (73) | 7.51 | 0.01* | |||
| Ethnicity, Hispanic | 267 | (14) | 80 | (18) | 4.98 | 0.03* | |||
| Marital status, married | 676 | (35) | 129 | (29) | 5.83 | 0.02* | |||
| Insurance, public payer | 404 | (21) | 96 | (21) | 0.09 | 0.76 | |||
| Education, not high school graduate | 282 | (14) | 68 | (15) | 0.13 | 0.72 | |||
| Episodes, 3+ previousa | 510 | (30) | 141 | (37) | 5.92 | 0.01* | |||
| Episode duration, 24+months | 823 | (42) | 198 | (44) | 0.50 | 0.48 | |||
| Panic disorder, PDSQ | 608 | (31) | 207 | (46) | 36.06 | 1.92×10−9* | |||
| Drug misuse, PDSQ | 179 | (9) | 75 | (17) | 21.75 | 3.1×10−6* | |||
| Alcohol misuse, PDSQ | 444 | (23) | 121 | (27) | 3.50 | 0.06 | |||
| Family history of bipolar disorder | 176 | (9) | 52 | (12) | 2.79 | 0.09 | |||
| Total | 1948 | (100) | 449 | (100) | |||||
| Age, decades | 1947 | 4.28 (1.33) | 449 | 3.93 (1.35) | 4.93 | 8.85 ×10−7* | |||
| HAMD, baseline | 1946 | 22.89 (5.27) | 449 | 22.98 (5.04) | −0.34 | 0.74 | |||
| Episode duration, months | 1947 | 40.38 (66.07) | 449 | 38.05 (53.69) | 0.70 | 0.49 | |||
s.d., Standard deviation; PDSQ, Psychiatric Diagnosis Screening Questionnaire; HAMD, Hamilton Rating Scale for Depression.
a
Excludes 320 subjects in whom the number of episodes is indeterminate.
*
p<0.05.