Table 1. Age-specific excess-death rates associated with the October 1918 –January 1919 influenza pandemic wave in Boyacá, Colombia*.
| Age group, y | Deaths from respiratory illness |
Deaths from all causes |
|||
|---|---|---|---|---|---|
| Excess mortality rate/10,000 population (95% CI) | Relative risk/ background mortality rate† | Excess mortality rate/10,000 population (95% CI) | Relative risk/ background mortality rate† | ||
| All ages | 40.1 (39.1–41.1) | 5.2 | 42.1 (39.1–44.1) | 1.7 | |
| 0–4 | 118.1 (111.1–125.1) | 3.0 | 118.1 (109.1–127.1) | 1.3 | |
| 5–9 | 21.1 (20.1–23.1) | 13.5 | 26.1 (23.1–29.1) | 3.6 | |
| 10–14 | 19.1 (18.1–20.1) | 11.4 | 18.1 (16.1–20.1) | 3.2 | |
| 15–19 | 28.1 (27.1–30.1) | 13.4 | 27.1 (24.1–30.1) | 3.3 | |
| 20–24 | 32.1 (30.1–33.1) | 12.6 | 35.1 (31.1–38.1) | 3.5 | |
| 25–29 | 36.1 (34.1–37.1) | 51.3 | 42.1 (39.1–45.1) | 5.7 | |
| 30–39 | 37.1 (35.1–38.1) | 6.9 | 39.1 (36.1–42.1) | 2.2 | |
| 40–49 | 36.1 (33.1–39.1) | 11.8 | 36.1 (31.1–41.1) | 1.6 | |
| 50–59 | 35.1 (31.1–40.1) | 11.5 | 27.1 (19.1–35.1) | 1.3 | |
| 60–69 | 73.1 (67.1–80.1) | 4.1 | 69.1 (55.1–82.1) | 1.1 | |
| 70–79 | 83.1 (69.1–98.1) | 3.4 | 82.1 (59.1–106.1) | 0.9 | |
| >80 | 100.1 (81.1–120.1) | 3.5 | 124.0 (87.2–160.8) | 0.9 | |
*Excess death estimates are based on observed mortality rates during pandemic weeks occurring in excess of background mortality rates derived from a seasonal regression model. †Ratio of excess deaths divided by background deaths during influenza pandemic weeks, facilitating comparisons across age groups with different background risks for death.