Table 1. Sample demographics and illness characteristics.
| Variable | WNV n = 32 | WNND n = 17 | p<0.0019a |
|---|---|---|---|
| Age (years); mean (SD) | 52.0 (8.9) | 50.5 (15.5) | 0.662 |
| Men; n (%) | 12 (37.5) | 6 (35.3) | 0.882 |
| Years of education; mean (SD) | 13.2 (2.6) | 13.7 (3.9) | 0.605 |
| Duration of illness (months); mean (SD) | 22.3 (16.1) | 20.5 (11.3) | 0.651 |
| DASS Depression score; mean (SD) | 5.0 (7.4) | 6.9 (9.1) | 0.476 |
| DASS Anxiety score; mean (SD) | 3.4 (4.4) | 6.1 (6.6) | 0.095 |
| DASS Stress score; mean (SD) | 7.1 (6.9) | 11.2 (10.4) | 0.111 |
| Fatigue severity score; mean (SD) | 2.9 (2.0) | 3.3 (1.8) | 0.555 |
WNV: West Nile virus; WNND: West Nile Virus neuroinvasive disease; SD: standard deviation; DASS: Depression Anxiety Stress Scale
aUnivariate analysis between WNV and WNND groups; Bonferroni-adjusted alpha for statistical significance is 0.0019
DASS Severity Classifications: Depression: Normal (0–9), Mild (10–13), Moderate (14–20), Severe (21–27), Extremely Severe (28+); Anxiety: Normal (0–7), Mild (8–9), Moderate (10–14), Severe (15–19), Extremely Severe (20+); Stress: Normal (0–14), Mild (15–18), Moderate (19–25), Severe (26–33), Extremely Severe (34+)
FSS: Normative data by Grace et al. 2006 indicate that the mean in a healthy population (n = 16) is 2.3 (SD 0.7)