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Table 1 Characteristics of patients hospitalized for severe acute respiratory infection (SARI) (n = 160), stratified per severity status, i.e. severe influenza A(H3N2) infections (cases) and non-severe influenza A(H3N2) infections (controls), Belgium, Influenza season 2016–2017

From: Evaluation of the added value of viral genomic information for predicting severity of influenza infection

  Severe SARI patients (i.e., cases)
(n = 38)
Non-severe SARI patients (i.e., controls) (n = 122)   p valuea
  Median + IQR Total Median + IQR Total  
Age (years) 77.5 (67.5–82) 38 77.5 (61–84) 122 0.94
Sampling period (weeks) 5 (4.25–6) 38 5 (4–6) 122 0.31
  Proportion Total Proportion Total  
Males 0.54 37 0.48 119 0.58
Vaccinated 0.53 19 0.34 71 0.18
Chronic cardiovascular condition 0.47 38 0.29 122 0.047
Chronic respiratory condition 0.39 38 0.20 122 0.02
Renal insufficiency 0.34 38 0.16 122 0.02
Hepatic insufficiency 0.03 38 0.04 122  > 0.99
Immunocompromised condition 0.26 38 0.10 122 0.02
Pregnant 0.00 38 0.02 122 /
Asthma 0.00 38 0.06 122 /
Neuromuscular condition 0.11 38 0.12 122  > 0.99
Diabetes 0.18 38 0.15 122 0.61
Obesity 0.08 38 0.11 122 0.76
  1. SARI severe acute respiratory infection, IQR interquartile range
  2. aWilcoxon rank sum test applied for medians and Fisher’s exact test applied for proportions