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 |