Table 1.
Characteristics of the two groups: mean (SD), number of participants (%), and significance testing
| Participant characteristics | Depression, n=49 | Neurological symptoms (controls), n=29 | Statistics (P-value) |
|---|---|---|---|
| Females (%) | 26 (53.1%) | 20 (69.0%) | NS (P=0.17) |
| Age, years | 45.3 (14.6) | 43.45 (13.51) | NS (P=0.58) |
| ApoE e4 present | 17 (34.7%) | 13 (44.8%) | NS (P=0.37) |
| Systolic BP, mmHg | 128.35 (20.0) | 129.96 (22.0) | NS (P=0.73) |
| Diastolic BP, mmHg | 78.96 (12.79) | 81.76 (13.78) | NS (P=0.37) |
| Use of antihypertensive drugs | 9 (18.4%) | 5 (17.2%) | NS (P=0.90) |
| BDI-II | 30.1 (12.4) | 7.14 (6.87) | P<0.000001 |
Notes: Sex, ApoE e4, and use of antihypertensive drugs, analyzed by Chi-squared analysis. For the other variables, Student’s t-tests were used.
Abbreviations: ApoE e4, Apolipoprotein E e4 allele; BP, blood pressure; BDI-II, Beck Depression Inventory-II; SD, standard deviation; NS, not significant.