Table 2.
A summary of sociodemographic characteristics and PHQ-8 records of participants from the 3 study sites and results of Kruskal-Wallis tests on these characteristics.
| Characteristic | KCLa | CIBERb | VUmcc | P valued | |
| Participants, n | 189 | 96 | 83 | —e | |
| PHQ-8f records, n | 1547 | 708 | 557 | — | |
| PHQ-8 scores, median (Q1, Q3) | 8 (4, 12) | 14 (8, 19) | 9 (5, 13) | <.001 | |
| The PHQ-8 score ≥10, n (%) | 599 (38.7) | 492 (69.5) | 248 (44.5) | <.001 | |
| Age at baseline, median (Q1, Q3) | 46 (30.3, 59.0) | 55 (49.3, 60.8) | 42 (28.0, 57.0) | <.001 | |
| Female sex, n (%) | 144 (76.2) | 69 (71.9) | 65 (81.9) | .62 | |
| Educationg, n (%) | — | — | — | <.001 | |
|
|
Degree or above | 116 (61.4) | 21 (21.9) | 40 (48.2) | — |
|
|
Below degree | 73 (38.6) | 75 (78.1) | 43 (51.8) | — |
| Annual incomeh (₤), n (%) | — | — | — | .009 | |
|
|
<15,000 | 40 (21.2) | 28 (29.2) | 24 (28.9) | — |
|
|
15,000-40,000 | 80 (42.3) | 53 (55.2) | 34 (41.0) | — |
|
|
>40,000 | 67 (35.5) | 15 (15.6) | 14 (16.9) | — |
|
|
Not mentioned | 2 (1.1) | 0 (0) | 11 (13.3) | — |
aKCL: King’s College London.
bCIBER: Centro de Investigación Biomédican en Red.
cVUmc: Vrije Universiteit Medisch Centrum.
dP value of Kruskal-Wallis test.
eNot applicable.
fPHQ-8: Patient Health Questionnaire 8-item.
gEducation levels of Spain and the Netherlands transformed into equivalent British education levels.
hAnnual income levels of Spain and the Netherlands transformed into equivalent British levels.