Table 2.
Characteristics and disease burden of the influenza ILI group and the non-influenza ILI group
| Variable | Influenza ILI group (N = 72) | Non-influenza ILI group (N = 73) |
|---|---|---|
| Number of household members | 4 (2–4) | 3 (2–4) |
| Male | 34 (47.9%) | 46 (63.8%) |
| Age | 42 (17–53) | 42 (22–55) |
| High-risk group | 15 (20.8%) | 22 (30.1%) |
| Smoker | 10 (13.9%) | 19 (26.0%) |
|
Day of healthcare facility visit (days from symptom onset) |
1 (1–2) | 1 (1–2) |
| Patients examined by RIDT | 71 (97.2%) | 57 (80.3%) |
| Treated by antivirals | 38 (90.5%) | 1 (4.3%) |
| Vaccinated for seasonal influenza | 28 (38.9%) | 22 (31.9%) |
| Income level | ||
| < 50,000 USDa/year | 20 (30.3%) | 22 (33.8%) |
|
50,000 USD/year < < 100,000 USD/year |
34 (51.5%) | 34 (52.3%) |
| > 100,000 USD/year | 12 (18.2%) | 9 (13.8%) |
| Education level of householder | ||
| Primary | 0 | 0 |
| Secondary | 33 (45.8%) | 32 (43.8%) |
| Tertiary | 37 (51.4%) | 34 (46.6%) |
| Advanced | 2 (2.8%) | 7 (9.6%) |
| Duration of symptoms (days) | 2 (2–3) | 2 (1–3) |
| QOL during symptomatic period | 0.66 (0.58–0.79) | 0.66 (0.59–0.79) |
| QALYs lost per episode | 0.0044 (0.0034–0.0066) | 0.0036 (0.0018–0.0054) |
| Duration of absenteeism (days) | 5 (4–6) | 2 (1–3) |
Values are shown as absolute number (percentage) or median (interquartile range)
RIDT Rapid influenza diagnostic test, QOL quality of life, QALYs quality-adjusted life-years, USD US dollars
a1 USD = 100 Japanese Yen