Table 3 Item-level scores of the PHQ-9

1

Little interest/pleasure of doing things

1.13 (.95)

1.76 (.93)

.72 (.85)

2

Feeling down, depressed, or hopeless

1.12 (1.00)

1.83 (.98)

.70 (.84)

3

Trouble falling or staying asleep, or sleeping too much

1.55 (1.06)

2.07 (1.00)

1.14 (1.02)

4

Feeling tired or having little energy

1.74 (.99)

2.26 (.87)

1.36 (.96)

5

Poor appetite or overeating

1.28 (1.02)

2.26 (.90)

.89 (.96)

6

Feeling bad about yourself – or that you are a failure or have let yourself or your family down

1.53 (1.08)

2.43 (.79)

.90 (.96)

7

Trouble concentrating on things, such as reading the newspaper or watching television

1.17 (1.04)

1.87 (1.01)

.68 (.87)

8

Moving or speaking so slowly that other people could have noticed, or so fidgety or restless that you have been moving a lot more than usual

.57 (.83)

.90 (.93)

.22 (.56)

9

Thoughts that you would be better off dead, or thoughts of hurting yourself in some way

.58 (.90)

1.21 (1.12)

.22 (.60)

Items

Little interest/pleasure of doing things

Feeling down, depressed, or hopeless

Trouble falling or staying asleep, or sleeping too much

Feeling tired or having little energy

Poor appetite or overeating

Feeling bad about yourself – or that you are a failure or have let yourself or your family down

Trouble concentrating on things, such as reading the newspaper or watching television

Moving or speaking so slowly that other people could have noticed, or so fidgety or restless that you have been moving a lot more than usual

Thoughts that you would be better off dead, or thoughts of hurting yourself in some way