| Depression symptoms | Not at all | Several days | More than half the days | Nearly every day | P-value |
| Little interest or pleasure in doing things? | 97 (28.4%) | 139 (40.8%) | 35 (10.3%) | 70 (20.5%) | 0.654 |
| Feeling down, depressed, or hopeless? | 79 (23.2%) | 70 (20.5%) | 120 (35.2%) | 72 (21.1%) | 0.359 |
| Trouble falling or staying asleep, or sleeping too much? | 150 (44.0%) | 125 (36.7%) | 22 (6.5%) | 44 (12.9%) | 0.041 |
| Feeling tired or having little energy? | 36 (10.6%) | 147 (43.1%) | 43 (12.6%) | 115 (33.7%) | 0.013 |
| Poor appetite or overeating? | 130 (38.1%) | 110 (32.3%) | 28 (8.2%) | 73 (21.4%) | 0.315 |
| Feeling bad about yourself—or that you are a failure or have let yourself or your family down? | 89 (26.1%) | 123 (36.1%) | 24 (7.0%) | 105 (30.8%) | 0.487 |
| Trouble concentrating on things, such as reading the newspaper or watching television? | 168 (49.3%) | 72 (21.1%) | 36 (10.6%) | 65 (19.1%) | 0.055 |
| Moving or speaking so slowly that other people could have noticed or the opposite—being so fidgety or restless that you have been moving around a lot more than usual? | 210 (61.6%) | 67 (19.6%) | 24 (7.0%) | 40 (11.7%) | 0.485 |
| Thoughts that you would be better off dead, or hurting yourself in some way? | 299 (87.7%) | 34 (10.0%) | 3 (0.9%) | 5 (1.5%) | 0.981 |