Table 1.
Sample (n = 204) characteristics by familial MDD risk status and psychiatric history
| Low risk (n = 79) | High risk (n = 125) | No psychiatric history (n = 45) | Only-past psychiatric history (n = 66) | Recent psychiatric history (n = 79) | |
|---|---|---|---|---|---|
| T2 Age, mean (s.d.) | 41.4 (14.3) | 44.3 (15.3) | 39.3 (15.7)a** | 49 (13.6)a,b | 39.8 (14.6)b** |
| <40 years, N (%) | 43 (54.4) | 54 (43.2) | 27 (60.0)a** | 20 (30.3)a,b | 45 (57.0)b** |
| ⩾40 years, N (%) | 36 (45.6) | 71 (56.8) | 18 (40.0)a** | 46 (69.7)a,b | 34 (43.0)b** |
| Sex: N (%) female | 43 (54.4) | 74 (59.2) | 25 (55.6) | 34 (51.5) | 49 (62.0) |
| Education: N (%) college degree or higher | 40 (50.3) | 69 (55.2) | 27 (60.0) | 38 (57.6) | 37 (46.8) |
| Marital status: N (%) | |||||
| Single/never married | 32 (40.5) | 41 (32.8) | 19 (42.2)a** | 11 (16.7)a,b | 41 (51.9)b** |
| Married/remarried | 41 (51.9) | 62 (49.6) | 20 (44.4)a** | 46 (69.7)a,b | 27 (34.2)b** |
| Separated/divorced/widowed | 6 (7.6) | 22 (17.6) | 6 (13.3) | 9 (13.6) | 11 (13.9) |
| Familial MDD risk: N (%) high risk | 22 (48.9)† | 41 (62.1) | 55 (69.6) | ||
| Time of completion: N (%) completed by midpoint (before November 2020) | 52 (65.8) | 76 (60.8) | 23 (51.1) | 44 (66.7) | 52 (65.8) |
For continuous variables, independent samples t test two-tailed test of significance used. Categorical/dichotomous variables, Pearson χ2 two-tailed test of significance used: †p < 0.10; *p < 0.05; **p < 0.01; ***p < 0.001. Bonferroni corrections were used for multiple comparisons.
a
Significant difference between no and only-past psychopathology.
b
Significant difference between only-past and recent psychiatric history.