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Table 2 Characteristics and disease burden of the influenza ILI group and the non-influenza ILI group

From: The characteristics of influenza-like illness management in Japan

VariableInfluenza ILI group (N = 72)Non-influenza ILI group (N = 73)
Number of household members4 (2–4)3 (2–4)
Male34 (47.9%)46 (63.8%)
Age42 (17–53)42 (22–55)
High-risk group15 (20.8%)22 (30.1%)
Smoker10 (13.9%)19 (26.0%)
Day of healthcare facility visit
(days from symptom onset)
1 (1–2)1 (1–2)
Patients examined by RIDT71 (97.2%)57 (80.3%)
Treated by antivirals38 (90.5%)1 (4.3%)
Vaccinated for seasonal influenza28 (38.9%)22 (31.9%)
Income level
  < 50,000 USDa/year20 (30.3%)22 (33.8%)
 50,000 USD/year <
 <  100,000 USD/year
34 (51.5%)34 (52.3%)
  > 100,000 USD/year12 (18.2%)9 (13.8%)
Education level of householder
 Primary00
 Secondary33 (45.8%)32 (43.8%)
 Tertiary37 (51.4%)34 (46.6%)
 Advanced2 (2.8%)7 (9.6%)
Duration of symptoms (days)2 (2–3)2 (1–3)
QOL during symptomatic period0.66 (0.58–0.79)0.66 (0.59–0.79)
QALYs lost per episode0.0044 (0.0034–0.0066)0.0036 (0.0018–0.0054)
Duration of absenteeism (days)5 (4–6)2 (1–3)
  1. Values are shown as absolute number (percentage) or median (interquartile range)
  2. RIDT Rapid influenza diagnostic test, QOL quality of life, QALYs quality-adjusted life-years, USD US dollars
  3. a1 USD = 100 Japanese Yen