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Table 1 Demographic and behavioural characteristics of the participants

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

VariableNumber (Percentage) or median (IQR)
Number of household members4 (3–4)
Male295/600 (49.2%)
Age (year)42 (21–57)
High-risk groupa46/201 (22.9%)x
Smoker81/600 (13.5%)
Healthcare facility visit194/261 (75.5%)
Duration of symptoms (days)2 (1–3)
Day of healthcare facility visit
(days from symptom onset)
1 (0–2)
Patients examined by RIDT169/191 (88.5%)
Patients diagnosed as influenza at healthcare facility101/194 (52.1%)
Influenza diagnosed by RIDT97/101 (96.0%)
Treated by antivirals among influenza cases diagnosed by RIDT96/101 (95.0%)
Class of antivirals prescribed 
 Oseltamivir22 (37.3%)
 Baloxavir20 (33.9%)
 Laninamivir9 (15.3%)
 Zanamivir4 (6.8%)
 Unknown4 (6.8%)
Vaccinated for seasonal influenza87 (34.5%)
Income level of household 
 <  50,000 USDb/year64 (32.0%)
 50,000 USD/year <
 <  100,000 USD/year
86 (43.0%)
 >  100,000 USD/year28 (14.0%)
Education level of householder 
 Primary1 (0.5%)
 Secondary83 (46.5%)
 Tertiary95 (47.5%)
 Advanced11 (5.5%)
  1. IQR Interquartile range, RIDT Rapid influenza diagnostic test, USD US dollars
  2. aParticipants who have past medical history associated with high-risk of severe influenza
  3. b1 USD = 100 Japanese yen