Table 1.
Demographic and clinical data for healthy control, MDD, and BD groups in Experiments 1 and 2
| Experiment 1 | HC n = 150 | MDD n = 266 | BD n = 202 | F/ X 2 | P-value | Post hoc |
|---|---|---|---|---|---|---|
| Age | 34.3 (16.1) | 36.8 (12.9) | 38.3(12.4) | 3.86 | 0.022 | BD>HC |
| Education | 15.7 (2.3) | 15.5 (2.6) | 15.4 (2.1) | 0.78 | 0.461 | NS |
| First age at onset | NA | 23.5 (11.9) | 16.5 (7.9) | 56.99 | <0.001 | |
| Synonym Knowledgea (per cent correct) | 75.4 (18.0) | 75.2 (17.1) | 77.5 (12.5) | 1.18 | 0.308 | NS |
| % Depressedb,c | NA | 73.7 | 51.5 | 29.58 | <0.001 | |
| % on Medicationd | NA | 63.3 | 84.9 | 29. 56 | <0.001 | |
| Experiment 2 | HC n = 17 | MDD n = 19 | BD n = 16 | F/ X2 | P | Post hoc |
| Age | 37.1 (18.9) | 44.1 (16.3) | 44.1 (11.5) | 1.09 | 0.344 | NS |
| Education | 16.0 (1.6) | 15.9 (2.3) | 15.8 (1.7) | 0.07 | 0.934 | NS |
| Hamilton Depression | NA | 15.2 (7.7) | 16.8 (5.4) | 0.49 | 0.488 | NS |
Data are presented as mean (SD).
aEstimated IQ using Synonym Knowledge Test, per cent correct.
bChi-Square (Fisher’s Exact).
cCut-off for depression: PHQ-9>9, HDRS>9, BDI>12.
dPer cent taking any psychiatric medication.
NA = not available; NS = not significant.