Table 1.
Sociodemographic characteristics for the total population (n = 3345)a
| Effect of group | Depression v. active controls | Depression v. healthy controls | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Depression group | Active controls | Healthy controls | Comparator test | Effect size (95% CI) | Comparator test | Effect size (95% CI) | Comparator test | Effect size (95% CI) | |
| Age, years | |||||||||
| n | 726 | 934 | 1595 | ||||||
| Mean (s.d.) | 45.9 (16.7) | 50.7 (18.9) | 45.8 (17.9) | ||||||
| Median (IQR) | 46 (24) | 50 (30) | 45 (28) | H = 40.39b P < 0.01b | 0.02 (0.01–0.02)c | U = 293682f | 0.02 (0.01,0.03)c | U = 569183f | 0.00 (0.00–0.02)c |
| Z = −4.68f | Z = −0.66f | ||||||||
| P < 0.01f | P = 0.51f | ||||||||
| Gender, n (%)d | |||||||||
| n | 737 (100) | 952 (100) | 1644 (100) | ||||||
| Female | 514 (70) | 501 (53) | 1166 (71) | ||||||
| Male | 223 (30) | 451 (47) | 478 (29) | P < 0.01d | 0.17e | P < 0.01d | 0.17e | P = 0.56d | 0.01e |
| Ethnicity, n (%) | |||||||||
| n | 736 (100) | 953 (100) | 1634 (100) | ||||||
| White | 694 (94) | 876 (92) | 1446 (89) | ||||||
| Asian | 13 (2) | 40 (4) | 98 (6) | ||||||
| Black/African/Caribbean | 10 (1) | 17 (2) | 45 (3) | ||||||
| Mixed | 11 (2) | 10 (1) | 25 (1) | ||||||
| Other | 8 (1) | 10 (1) | 20 (1) | P < 0.01d | 0.66e | P = 0.06d | 0.07e | P < 0.01d | 0.10e |
a.
Totals in the table do not add up to n = 3345 because of missing data.
b.
Kruskal–Wallis.
c.
Eta-squared; effect sizes: small (0.01), medium (0.06) and large (0.14).
d.
Chi-squared.
e.
Cramér's V; effect sizes: small (0.1), medium (0.3) and large (0.5).
f.
Mann–Whitney.