Volume 13, Number 5—May 2007
Research
Trends for Influenza-related Deaths during Pandemic and Epidemic Seasons, Italy, 1969–2001
Caterina Rizzo*†
, Antonino Bella*, Cécile Viboud‡, Lone Simonsen‡, Mark A. Miller‡, Maria Cristina Rota*, Stefania Salmaso*, and Marta Luisa Ciofi degli Atti*
, Antonino Bella*, Cécile Viboud‡, Lone Simonsen‡, Mark A. Miller‡, Maria Cristina Rota*, Stefania Salmaso*, and Marta Luisa Ciofi degli Atti*
Table 1
Mean age-standardized excess all-cause deaths per 100,000 population and percent increase in death rates and the winter seasonal percent increase attributable to influenza, Italy, 1969–2001*
| Deaths | Northern | Central | Southern |
|---|---|---|---|
| Pandemic season (1969–1970) | |||
| Excess | 103.6 | 85.3 | 105.2 |
| Percent increase | 21.7 | 21.0 | 25.9 |
| Epidemic seasons (1970–2001) | |||
| Excess | 13.7 | 13.2 | 17.1 |
| Percent increase | 3.4 | 3.6 | 5.1 |
| Entire study period (1969–2001) | |||
| Excess | 16.6 | 15.4 | 19.9 |
| Percent increase | 4.0 | 4.1 | 5.7 |
*95% confidence intervals for individual season estimates were within 6% of values listed.
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