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Table 3 Presence, absence, and mean severity scores of individual ARI symptoms in study participants with RT-PCR confirmed influenza, stratified by age and influenza vaccination status (n = 324) 1

From: A cross-sectional analysis of symptom severity in adults with influenza and other acute respiratory illness in the outpatient setting

  18-49 years 50-64 years ≥65 years  
  Vaccinated Vaccinated Vaccinated  
Symptoms Yes No Yes No Yes No p
  (n = 52) (n = 144) (n = 43) (n = 48) (n = 27) (n = 10)  
Nasal congestion 2.15 1.95 1.74 1.97 1.89 2.13 0.128
  Present (%) 90 89 91 81 70 80 0.465
  Absent (%) 10 11 9 19 30 20
Sore throat 2.00 1.97 1.86 1.84 1.67 2.57 0.056
  Present (%) 87 76 67 77 56 70 0.112
  Absent (%) 13 24 33 23 44 30
Cough 2.39 2.18 2.30 2.47 2.41 2.80 0.046
  Present (%) 98 97 100 98 100 100 0.998
  Absent (%) 2 3 0 2 0 0
Wheezing 1.88 1.57 1.75 1.68 1.85 1.78 0.607
  Present (%) 46 53 65 52 48 90 0.045
  Absent (%) 54 47 35 48 52 10
Feverishness 2.17 2.17 1.87 2.11 1.70 2.63 0.016
  Present (%) 88 89 91 94 74 80 0.904
  Absent (%) 12 11 9 6 26 20
Headache 2.19 2.11 2.03 1.90 1.58 2.13 0.167
  Present (%) 83 82 77 88 70 80 0.504
  Absent (%) 17 18 23 13 30 20
Muscle aches 2.11 2.24 2.15 2.15 1.93 2.43 0.432
  Present (%) 87 88 77 96 56 70 0.163
  Absent (%) 13 12 23 4 44 30
Fatigue 2.40 2.34 2.48 2.40 2.25 2.50 0.558
  Present (%) 96 94 98 98 89 100 0.955
  Absent (%) 4 6 2 2 11 0  
  1. 1Values for symptom severity scores are reported as mean and p-value, among participants where the symptom was present. Values for the presence/absence of each symptom are reported as percent of column total, and p-value for chi-square test comparing symptom between each age/vaccination group.