Table 1. Description of the samples and subsamples.
|
Level 1 |
Level 2 | ||||||
|---|---|---|---|---|---|---|---|
| Budapest | Manchester | Budapest + Manchester | Difference between Budapest and Manchester | P-values | Manchester | ||
| Gender | Female (%) | 631 (69.8%) | 922 (69.7%) | 1553 (69.8%) | χ2=0.001 | 0.977 | 142 (68.9%) |
| Male (%) | 273 (30.2%) | 400 (30.3%) | 673 (30.2%) | 64 (31.1%) | |||
| ATP6V1B2 rs1106634 | AA (%) | 12 (1.3%) | 28 (2.1%) | 40 (1.8%) | χ2=10.445 | 0.005 | 7 (3.4%) |
| GA (%) | 184 (20.4%) | 337 (25.5%) | 521 (23.4%) | 35 (17.0%) | |||
| GG (%) | 708 (78.3%) | 957 (72.4%) | 1665 (74.8%) | 164 (79.6%) | |||
| Lifetime depression | Reported (%) | 197 (21.8%) | 740 (56.0%) | 937 (42.1%) | χ2=257.378 | <0.001 | 108 (52.4%) |
| Not reported (%) | 707 (78.2%) | 582 (44.0%) | 1289 (57.9%) | 98 (47.6%) | |||
| Age (mean±s.e.m.) | 31.24 (0.353) | 34.03 (0.282) | 32.90 (0.222) | t=−6.216 | <0.001 | 32.41 (0.730) | |
| BSI depression score (mean±s.e.m.) | 0.57 (0.023) | 1.07 (0.028) | 0.87 (0.020) | t=−13.744 | <0.001 | ||
| MADRS depression score (mean±s.e.m.) | 4.58 (0.493) | ||||||
| Neuroticism score (mean±s.e.m.) | 2.84 (0.028) | 3.36 (0.025) | 3.15 (0.019) | t=−13.922 | <0.001 | 93.04 (1.957) | |
| PAL memory score (mean±s.e.m.) | 21.03 (0.251) | ||||||
| PAL errors (mean±s.e.m.) | 7.57 (0.625) | ||||||
| PAL required trials (mean±s.e.m.) | 10.76 (0.219) | ||||||
| SOC ITT (mean±s.e.m.) (ms) | 5709.34 (306.745) | ||||||
| SOC correct trial rate (mean±s.e.m.) | 0.74 (0.011) | ||||||
Abbreviations: BSI, Brief Symptom Inventory; MADRS, Montgomery-Åsberg Depression Rating Scale; PAL, Paired associates learning task; PAL memory score, memory score on the first trial of PAL; PAL errors, total number of errors on PAL; PAL required trials, total number of trials on PAL; χ2, Pearson chi-square; s.e.m., standard error of mean; SOC, Stockings of Cambridge task; SOC correct trial rate, rate of problems solved in minimum moves; SOC ITT, mean of all initial thinking times throughout the SOC task.