Table 1.
Distribution of scores on the PHQ-4 scale for study participants (N = 1978)
| Over the last 2 weeks, how often have you been bothered by the following problems | Population average score, M (±SE) | Not at all (Score 0), N (%) | Several days (Score 1), N (%) | More than half of the days (Score 2), N (%) | Almost every day (Score 3), N (%) |
|---|---|---|---|---|---|
| (a) Feeling nervous, anxious or on edge | 1.17 (0.02) | 570 (29) | 737 (38) | 438 (22) | 233 (11) |
| (b) Not being able to stop or control worrying/worries | 1.11 (0.02) | 732 (37) | 573 (29) | 415 (21) | 258 (13) |
| GAD-2 anxiety score (Item a + Item b) | 2.10 (0.04) | ||||
| (c) Feeling down, depressed or hopeless | 1.05 (0.02) | 730 (37) | 639 (32) | 394 (20) | 215 (11) |
| (d) Little interest or pleasure in doing things | 1.06 (0.02) | 750 (38) | 601 (30) | 403 (20) | 224 (11) |
| PHQ-2 depression score (Item c + Item d) | 2.27 (0.05) | ||||
| PHQ-4 psychological distress score (Items a + b + c + d) | 4.36 (0.08) | ||||
M (±SE) indicates average scores for each item and subscale for the total population.
N (%) indicates the frequency and percentage of individuals who selected an option on the items and subscales.