Table 1.
Clinical characteristics of the total sample (n = 120)
| Characteristics | Mean (SD) | H | U | X2 | df | P value | ||
|---|---|---|---|---|---|---|---|---|
|
|
||||||||
| MDD | BD | HC | ||||||
| Sample, no | 75 | 15 | 30 | |||||
| Sex, no | ||||||||
| Male | 9 | 7 | 6 | 10.11 | 2 | 0.006 | ||
| Female | 66 | 8 | 24 | |||||
| Age, y | 66.3 (7.6) | 63.1 (4.8) | 65.8 (5.4) | 2.13 | 2 | 0.34 | ||
| HAMD, point | 19.3 (3.4) | |||||||
| −13 | 1 | |||||||
| 14–18 | 42 | |||||||
| 19–22 | 13 | |||||||
| 23– | 19 | |||||||
| Duration of illness, y | 4.9 (2.7) | 11.5 (3.2) | 108 | <0.001 | ||||
| −0.5 | 0 | 0 | ||||||
| 0.6–1.0 | 10 | 0 | ||||||
| 1.1–3.0 | 22 | 0 | ||||||
| 3.1–6.0 | 19 | 2 | ||||||
| 6.1– | 24 | 13 | ||||||
| Duration of treatment, y | 3.4 (2.5) | 6.2 (4.0) | 346 | 0.019 | ||||
| −0.5 | 7 | 1 | ||||||
| 0.6–1.0 | 18 | 2 | ||||||
| 1.1–3.0 | 19 | 3 | ||||||
| 3.1–6.0 | 18 | 1 | ||||||
| 6.1– | 13 | 8 | ||||||
Abbreviations: BD, bipolar disorder; H, Kruskal–Wallis nonparametric multiple sample test; HAMD, Hamilton’s Rating Scale for Depression; HC, healthy controls; MDD, major depressive disorder; U, Mann–Whitney nonparametric 2-sample test.