Table 1.
Evaluation of socio-demographic characteristics
| Variable | Bipolar depression (n = 37) | Unipolar depression (n = 24) | Control (n = 50) | pvalue |
|---|---|---|---|---|
| Sex, female/male | 23 (62.2)/14 (37.8) | 15 (62.5)/9 (37.5) | 30 (60)/20 (40) | 0.970a |
| Age (yr) | 38.4 ± 10.7 | 40.6 ± 14.1 | 37.2 ± 9.8 | 0.485b |
| Marital status | 0.703c | |||
| Single | 16 (43.2) | 10 (41.7) | 0 (0) | |
| Married | 21 (56.8) | 13 (54.2) | 50 (100) | |
| Divorced | 0 (0) | 1 (4.2) | 0 (0) | |
| Age at disease onset (yr) | 27.5 ± 10.2 | 36.1 ± 12.8 | - | 0.005e |
| Smoking (packet-yr) | 0 (0−30) | 0 (0−25) | - | 0.315d |
| Duration of disease (yr) | 8 (3−25) | 2 (1−15) | - | < 0.001d |
| Number of hospitalizations | 2 (0−8) | 0 (0−2) | - | < 0.001d |
| Number of previous manic episodes | 2 (0−6) | - | - | - |
| Number of depressive episodes | 1 (0−4) | 2 (1−4) | - | 0.094d |
| Young mania rating scale score | 3.2 ± 1.2 | - | - | - |
| Hamilton depression scale score | 28.8 ± 7.3 | 28.7 ± 4.9 | - | 0.722c |
Descriptive statistics were presented as number (%), mean ± standard deviation or median (minimum−maximum) for continuous variables.
a
Pearson chi-square test. bOne-way ANOVA (analysis of variance). cFisher-Freeman-Halton test. dMann−Whitney Utest. eIndependent samples ttest. The significance level was set at p < 0.05.