influenza: An acute viral infection of the respiratory tract, occurring in isolated cases, in epidemics, or in pandemics; it is caused by serologically different strains of viruses (influenzaviruses) designated A, B, and C, has a 3-day incubation period, and usually lasts for 3 to 10 days. It is marked by inflammation of the nasal mucosa, pharynx, and conjunctiva; headache; myalgia; often fever, chills, and prostration; and occasionally involvement of the myocardium or central nervous system.
| Name | INFLUENZA |
|---|---|
| Long name | All influenza (not pneumonia) |
| Hospital Discharge registry | ICD-10: J10/J11, ICD-9: 487, ICD-8: 47[0-4] |
| Hospital Discharge registry: exclude ICD-10 | J100|J110 |
| Hospital Discharge registry: exclude ICD-9 | 4870 |
| Hospital Discharge registry: exclude ICD-8 | 471 |
| Cause of Death registry | ICD-10: J11/J10, ICD-9: 487, ICD-8: 47[0-4] |
| Cause of Death registry: exclude ICD-10 | 4870 |
| Cause of Death registry: exclude ICD-9 | 471 |
| First defined in version | DF2 |
| All | Female | Male | |
|---|---|---|---|
| Number of individuals | 2676 | 1051 | 1625 |
| Unadjusted prevalence (%) | 1.23 | 0.86 | 1.73 |
| Mean age at first event (years) | 43.04 | 50.07 | 38.50 |
| Case fatality at 5-years (%) | 3.62 | 3.52 | 3.69 |
| All | Female | Male | |
|---|---|---|---|
| Median nb. of events per indiv. | 1.0 | 1.0 | 1.0 |
| Recurrence at 6 months (%) | 1.76 | 2.09 | 1.54 |
before All influenza (not pneumonia)
after All influenza (not pneumonia)
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