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Table 5 Seasonal Influenza attributions (rate per 100,000 population) in selected studies conducted in the US and Europe

From: Model estimates of the burden of outpatient visits attributable to influenza in the United States

Country Study year Data source Outcome Age (yrs) Event rate (average per season/100,000 population)
UK [8] 1995–2009 Clinical Practice Research Datalink Respiratory disease (broadly defined) general practitioner visits 0–4 2975
5–17 2213
18–49 1187
50–64 1255
65+ 1216
All 1460
European Paediatric Influenza Analysis project [17] UK, 2002–2008 RCGP Weekly Returns Service Influenza-like-illness outpatient visits 0–4 384
5–17 315
Italy, 2003–2008 surveillance network 0–4 9229
5–17 8915
Netherlands 2002–2008 surveillance network 0–4 925
5–17 121
Spain, 2002–2008 Spanish Influenza Sentinel Surveillance System 0–4 2,156
5–17 2,955
US [16] 2001–2006 Electronic reporting of emergency department chief complaint data (New York city) “fever and respiratory” syndrome <2 540–7710
2–4 610–4790
5–12 380–1230
13–17 140–820
18–39 80–440
40–64 60–340
65+ 50–570
US [24] 1993–2008 The Healthcare Cost and Utilization Project Influenza-hospitalizations <1 151/100,000 p–y
1–4 39/100,000 p–y
5–49 17/100,000 p–y
50–64 6/100,000 p–y
65+ 309/100,000 p–y
All 64/100,000 p–y
US [25] 1997–2007 National Center for Health Statistics All-cause deaths All 11.92
Respiratory deaths All 3.58
US [3] 1997–2009 US National Vital Statistics System Respiratory disease (broadly defined) deaths 0–4 0.5
5–17 0.2
18–49 0.6
51–64 3.5
65–74 14.1
75+ 80.1
All 6.6
  1. RCGP royal college of general practitioners, p–y person years