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Table 1 Distribution of SHCLCI in Catalonia by age group and influenza virus type-subtype. PIDIRAC 2010–2015

From: Descriptive study of severe hospitalized cases of laboratory-confirmed influenza during five epidemic seasons (2010–2015)

Age group (years) SHCLCI cases % Death/CFR (%)   
0–4 167 11.9 2 (1.2)   
5–14 46 3.3 1 (2.2)   
15–44 172 12.3 10 (5.8)   
45–64 382 27.3 43 (11.3)   
≥ 65 633a 45.2 111 (17.5)   
Total 1400   167 (12%)   
All cases type/subtype Number of cases (%) Mean age SD 95% CI lower 95% CI upper
A (H3N2) 410 (29.3) 66.9 23.6 64.6 69.2
A (H1N1)pdm09 531 (37.9) 46.8 25.8 44.6 49.0
B 172 (12.3) 53.7 28.5 49.4 58
Total with type-subtype 1113/1400 1113 (79.5) 55.3 27.1 53.7 56.9
Cases with outcome death type/subtype Number of cases (%) Mean age SD 95% CI lower 95% CI upper
A (H3N2) 54 (38.9) 78.8 11.3 75.7 81.8
A (H1N1)pdm09 62 (44.6) 60.2 17.5 56 64.6
B 23 (16.5) 75.1 13.4 69.4 81
Total with type-subtype 139/167 139 (83.2) 69.8 17.1 67 72.7
  1. p < 0.001
  2. p < 0.001
  3. aDistribution of cases aged ≥ 65 years: 296 (46.7%) ≥ 80 years with highest CFR 55/33.3%