Table A1.
Patient Health Questionnaire-9
| QUESTION | OVER THE LAST 2 WEEKS, HOW OFTEN HAVE YOU BEEN BOTHERED BY ANY OF THE FOLLOWING PROBLEMS? | NOT AT ALL | SEVERAL DAYS | MORE THAN HALF THE DAYS | NEARLY EVERY DAY |
|---|---|---|---|---|---|
| Q1 | Little interest or pleasure in doing things | 0 | 1 | 2 | 3 |
| Q2 | Feeling down, depressed, or hopeless | 0 | 1 | 2 | 3 |
| Q3 | Trouble falling or staying asleep, or sleeping too much | 0 | 1 | 2 | 3 |
| Q4 | Feeling tired or having little energy | 0 | 1 | 2 | 3 |
| Q5 | Poor appetite or overeating | 0 | 1 | 2 | 3 |
| Q6 | Feeling bad about yourself—or that you are a failure or have let yourself or your family down | 0 | 1 | 2 | 3 |
| Q7 | Trouble concentrating on things, such as reading the newspaper or watching television | 0 | 1 | 2 | 3 |
| Q8 | 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 | 0 | 1 | 2 | 3 |
| Q9 | Thought that you would be better off dead, or of hurting yourself in some way | 0 | 1 | 2 | 3 |
The Patient Health Questionnaire-9 is scored by adding up all checked boxes. Point scores as assigned as follows: not at all=0; several days=1; more than half the days=2; and nearly every day=3. A total score of 0–4 is defined as no depression, 5–9 as mild depression, 10–19 as moderate depression, and 20–27 as severe depression.