Table 1.
Instruction and items | Mean item scores (SD) | ||
---|---|---|---|
The following questions ask about how you have been feeling over the past 2 weeks. Please put a tick in the box which is closest to how you have been feeling. How much of the time… | Original response categoriesa | Collapsed response categoriesb | |
1. | Have you felt low in spirits or sad? | ||
2. | Have you lost interest in your daily activities? | 1.37 (1.50) | 0.88 (0.81) |
3. | Have you felt lacking in energy and strength? | 2.26 (1.74) | 1.25 (0.73) |
4. | Have you felt less self-confident? | 1.16 (1.43) | 0.77 (0.79) |
5. | Have you had a bad conscience or feelings of guilt? | 0.56 (1.05) | 0.39 (0.62) |
6. | Have you felt life wasn’t worth living? | 0.67 (1.24) | 0.43 (0.67) |
7. | Original: Have you had difficulty in concentrating, e.g., when reading the newspaper or watching television; Our modified version: Have you had difficulty in concentrating, e.g., when listening to the radio or following a television program? | 1.32 (1.46) | 0.79 (0.85) |
8a. | Have you felt very restless? | 1.32 (1.46) | 0.86 (0.76) |
8b. | Have you felt subdued or slowed down? | ||
9. | Have you had trouble sleeping at night? | ||
10a. | Have you suffered from reduced appetite? | 1.08 (1.60) | 0.63 (0.81) |
10b. | Have you suffered from increased appetite? |
aThe six original response categories were: 5 (all the time), 4 (most of the time), 3 (slightly more than half the time), 2 (slightly less than half the time), 1 (some of the time), and 0 (at no time).
bThe collapsed response categories were: 2 (all the time, most of the time, or slightly more than half the time), 1 (slightly less than half the time, or some of the time), and 0 (at no time).