Table 1. Demographic and clinical characteristics of the participants.
| FDD+PF (n = 47) |
FDD+NF (n = 36) |
HC (n = 47) |
P-value | |
|---|---|---|---|---|
| Age (yrs) | 33.6 ± 7.9 | 34.7 ± 6.5 | 33.0 ± 7.7 | 0.600 |
| Sex (M/F) | 28/19 | 20/16 | 27/20 | 0.934 |
| Illness duration, month | 130.8 ± 93.8 (days) | 116.2 ± 95.4 (days) | 0.488 | |
| HRSD score | 37.21 ± 11.24 | 27.78 ± 7.64 | < 0.001 |
FDD+PF: First-episode, drug-naïve depression patients with a positive family history; FDD+NF: First-episode, drug-naïve depression patients with a negative family history; HC: healthy controls; HRSD: 17-item version Hamilton Rating Scale for Depression.