Table 2.
Estimates of excess mortality rate per 10,000 population and rate ratio (RR) attributable to pandemic influenza, by time of pandemic wave, age and cause of death, Arizona, 1918–1921
| Time, Cause of death | Excess death rate per 10,000 population, by age (RR) | Excess deaths by total population (RR) | |||||
|---|---|---|---|---|---|---|---|
| <5 | 5–14 | 15–24 | 25–44 | 45–64 | ≥65 | ||
| P&I deaths | |||||||
| Spring 1918 (April, 1918) | 1.80 (1.46) | 0.24 (2.03) | 1.68 (2.78) | 3.31 (4.18) | 0.76 (1.43) | 1.48 (1.68) | 1.78 (2.32) |
| Fall 1918 (Oct to Dec, 1918) | 66.52 (6.68) | 19.51 (16.37) | 66.28 (22.30) | 93.91 (26.12) | 30.98 (5.88) | 39.49 (2.47) | 60.85 (13.13) |
| Winter 1919 (Jan to April, 1919) | 11.95 (1.70) | 3.08 (2.98) | 12.56 (3.46) | 23.93 (5.28) | 6.71 (1.75) | 7.55 (1.86) | 12.79 (2.63) |
| Winter 1920 (1st Feb to 11th April, 1920) | 16.51 (2.21) | 1.80 (3.15) | 2.91 (1.97) | 11.33 (4.60) | 3.28 (1.69) | 12.79 (1.62) | 7.42 (2.58) |
| Total pandemic period | 96.78 (3.10) | 24.63 (7.31) | 83.43 (7.86) | 132.48 (10.80) | 41.73 (2.91) | 61.32 (2.05) | 82.84 (5.38) |
| Respiratory deaths | |||||||
| Spring 1918 (April, 1918) | 1.67 (1.20) | 0.24 (1.58) | 1.72 (2.58) | 3.66 (3.83) | 0.82 (1.40) | 6.65 (2.23) | 2.02 (1.96) |
| Fall 1918 (Oct to Dec, 1918) | 71.56 (4.28) | 20.58 (12.40) | 69.18 (20.80) | 95.01 (22.22) | 32.63 (5.41) | 34.43 (2.13) | 62.56 (9.70) |
| Winter 1919 (Jan to April, 1919) | 9.13 (1.25) | 2.75 (2.17) | 13.13 (3.14) | 24.86 (4.67) | 9.97 (1.87) | 8.05 (1.62) | 13.01 (2.09) |
| Winter 1920 (1st Feb to 11th April, 1920) | 21.18 (1.80) | 1.85 (2.36) | 3.07 (1.82) | 11.83 (4.06) | 5.01 (1.81) | 15.73 (1.60) | 8.50 (2.14) |
| Total pandemic period | 103.54 (2.11) | 25.42 (5.29) | 87.10 (7.03) | 135.36 (9.25) | 48.43 (2.78) | 64.86 (1.86) | 86.09 (3.99) |
| Tuberculosis | |||||||
| Spring 1918 (April, 1918) | 0.08 (1.40) | 0.07 (1.34) | 1.17 (1.39) | 1.09 (1.21) | 0.59 (1.26) | 2.94 (2.16) | 0.73 (1.27) |
| Fall 1918 (Oct to Dec, 1918) | 0.43 (1.79) | 0.97 (5.54) | 3.46 (1.47) | 11.09 (1.84) | 3.31 (1.38) | 6.60 (1.70) | 4.99 (1.65) |
| Winter 1919 (Jan to April, 1919) | 0.73 (1.65) | 0.59 (4.90) | 2.25 (1.25) | 3.81 (1.27) | 1.83 (1.29) | 7.60 (1.83) | 1.94 (1.24) |
| Winter 1920 (1st Feb to 11th April, 1920) | 1.02 (1.99) | 0.43 (4.05) | 4.19 (1.54) | 1.16 (1.13) | 1.44 (1.42) | 4.30 (2.59) | 0.98 (1.14) |
| Total pandemic period | 2.26 (1.78) | 2.06 (3.95) | 11.07 (1.41) | 17.15 (1.41) | 7.16 (1.34) | 21.44 (1.90) | 8.64 (1.33) |
| All cause | |||||||
| Spring 1918 (April, 1918) | 4.74 (1.13) | 0.98 (1.46) | 2.30 (1.31) | 3.86 (1.37) | 4.62 (1.34) | 14.04 (1.33) | 3.54 (1.29) |
| Fall 1918 (Oct to Dec, 1918) | 62.01 (1.77) | 21.33 (4.29) | 68.64 (4.39) | 100.39 (4.32) | 35.78 (1.75) | 32.45 (1.34) | 63.41 (2.72) |
| Winter 1919 (Jan to April, 1919) | 4.75 (1.07) | 3.28 (1.64) | 8.36 (1.37) | 19.95 (1.45) | 6.91 (1.15) | 10.30 (1.15) | 8.72 (1.17) |
| Winter 1920 (1st Feb to 11th April, 1920) | 15.73 (1.23) | 1.93 (1.59) | 6.65 (1.33) | 10.81 (1.36) | 2.91 (1.09) | 28.44 (1.23) | 8.38 (1.24) |
| Total pandemic period | 87.23 (1.34) | 27.52 (2.62) | 85.95 (2.22) | 135.01 (2.18) | 50.23 (1.35) | 85.23 (1.26) | 84.05 (1.63) |