Variable | Overall case fatality ratio | Pandemic wave | P valuea | ||
---|---|---|---|---|---|
Wave 1 | Wave 2 | Wave 3 | |||
Total A/H1N1 deaths (% of total A/H1N1 cases) | 2.1% (2.0,2.3) | 4.6% (3.1,6.5) | 0.7% (0.5,1.0) | 2.5% (2.3,2.7) | P < 0.0001 |
Central | 2.7% (2.4,3.0) | 5.5% (3.6,8.1) | 1.7% (0.8,3.0) | 2.7% (2.4,3.0) | P < 0.0001 |
Southern | 0.8% (0.6,1.0) | 0% (0,6.2) | 0.5% (0.3,0.8) | 1.2% (0.8,1.7) | P < 0.0001 |
Other states | 2.3% (2.1,2.6) | 3.2% (0.9,8.1) | 0.9% (0.4,1.5) | 2.6% (2.2,2.9) | P < 0.0001 |
Demography | |||||
Female | 2.1% (1.8,2.3) | 4.5% (2.5,7.5) | 0.6% (0.3,0.9) | 2.4% (2.1,2.7) | P < 0.0001 |
Male | 2.2% (2.0,2.5) | 4.6% (2.5,7.6) | 0.9% (0.6,1.3) | 2.5% (2.2,2.8) | P < 0.0001 |
Age (years) | |||||
<18 | 0.6% (0.5,0.8) | 0.7% (0.1,2.6) | 0.1% (0.04,0.3) | 0.8% (0.6,0.97) | P < 0.0001 |
18–49 | 2.8% (2.5,3.1) | 6.0% (3.5,9.4) | 1.2% (0.8,1.7) | 3.2% (2.8,3.6) | P < 0.0001 |
>50 | 8.5% (7.2,9.8) | 15.7% (7.0,28.6) | 3.5% (1.6,6.5) | 9.1% (7.7,10.6) | P < 0.0001 |