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Table 2 Mean seasonal hospitalisations for respiratory diseasea attributable to influenza by age and risk statusb

From: Modelling estimates of age-specific influenza-related hospitalisation and mortality in the United Kingdom

   Influenza A Influenza B
Age Risk N (SD) Rate (SD) N (SD) Rate (SD)
0–4 All 3247 93 0 0
Low 3866 111 0 0
High 0 0 0 0
5–17 All 796 8 1173 12
Low 1009 10 1295 13
High 0 0 144 1
18–49 All 3273 13 652 2
Low 1754 7 549 2
High 15,509 59 1501 6
50–64 All 4005 39 51 0
Low 1454 14 68 1
High 12,793 124 0 0
65–74 All 5019 101 0 0
Low 1743 35 0 0
High 9828 199 0 0
75+ All 10,195 252 0 0
Low 6625 164 0 0
High 13,181 326 0 0
All agesc All 27,237 (17,895) 46 (30) 1279 (1914) 2 (3)
Low 14,238 (9261) 24 (16) 1836 (1803) 3 (3)
High 84,142 (61,066) 143 (104) 0 (7759) 0 (13)
  1. N Number of episodes, SD standard deviation, Rate per 100,000 population, Hospitalisations from HES 1997–2009
  2. abroadly defined
  3. brisk group defined according the chronic conditions indicative of risk for severe influenza as per UK recommendations for influenza vaccination. These include chronic obstructive respiratory disease; cardiovascular, central nervous system, renal and liver disorders; diabetes; immunosuppressive conditions or stroke
  4. cthe attributions for each age group are not equal to the sum of the attributions (all ages) due to separately run models