Table 3. Adjusted annual cumulative incidence1 of influenza associated hospitalization per 10,000 population by age, influenza type and subtype, Vadu, District Pune, India, May 2009–April 2011.
| Year 1: May 2009–April 2010 | |||||||||||||
| Seasonal A | H1N1pdm09 | B | |||||||||||
| Age (years) | Adjustment Factor2 | Adjusted Incidence | (95% CI) | Adjusted Incidence | (95% CI) | Adjusted Incidence | (95% CI) | ||||||
| <1 | 0.46 | 0.0 | 0.0 | - | 19.2 | 0.0 | — | - | — | 11.3 | 1.3 | - | 37.6 |
| 1–4 | 0.50 | 14.8 | 7.7 | - | 26.0 | 29.6 | 19.1 | - | 44.3 | 9.9 | 4.3 | - | 19.6 |
| 5–14 | 0.78 | 19.1 | 13.1 | - | 26.7 | 30.1 | 22.4 | - | 39.3 | 12.5 | 8.0 | - | 19.2 |
| 15–29 | 0.73 | 21.3 | 16.7 | - | 26.8 | 31.7 | 26.2 | - | 38.4 | 14.1 | 10.3 | - | 18.6 |
| 30–44 | 0.76 | 13.9 | 9.3 | - | 20.0 | 9.4 | 5.9 | - | 14.8 | 1.9 | 0.5 | - | 4.9 |
| 45–59 | 0.68 | 10.7 | 5.0 | - | 19.2 | 6.1 | 2.3 | - | 13.6 | 1.5 | 0.0 | - | 5.8 |
| 60+ | 0.67 | 7.0 | 1.7 | - | 16.0 | 2.3 | 0.0 | - | 8.7 | 2.3 | 0.0 | - | 8.7 |
| all ages | 16.4 | 14.0 | - | 19.2 | 21.5 | 18.8 | - | 24.7 | 8.8 | 7.1 | - | 10.9 | |
1
Adjusted hospitalization incidence = (unadjusted incidence)/(% of acute medical hospitalizations reported on health utilization survey that occurred at study facilities).
2
Adjustment factor = proportion of acute medical hospitalizations reported on HUS that occurred at study facilities.