Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Distribution characteristics of chronotype and depressive symptoms.
| Depressive symptoms | n | Chronotype | χ2-value | ||
|---|---|---|---|---|---|
| M-types | N-types | E-types | |||
| PHQ-9 | 19.47a | ||||
| No depression | 651 | 137 (21.0) | 462 (71.0) | 52 (8.0) | |
| Mild depression | 368 | 54 (14.7) | 268 (72.8) | 46 (12.5) | |
| Moderate depression | 68 | 9 (13.2) | 48 (70.6) | 11 (16.2) | |
| Moderate to severe depression | 48 | 9 (18.8) | 29 (60.4) | 10 (20.8) | |
P-value < 0.05.
