| Selected determinants | Mortality, IRR* (95% CI) | Admission to hospital, IRR* (95% CI) |
|---|---|---|
| Sex and age, yr | ||
| Female | ||
| ≤ 14 | 0.36 (0.17–0.79) | 0.83 (0.60–1.14) |
| 15–24 | 2.46 (1.48–4.14) | 1.02 (0.73–1.42) |
| 25–34 | 1.00 | 1.00 |
| 35–44 | 1.75 (1.07–3.06) | 1.04 (0.76–1.42) |
| 45–54 | 1.93 (1.08–3.49) | 1.00 (0.73–1.39) |
| 55–64 | 2.10 (1.16–3.78) | 1.04 (0.73–1.49) |
| 65–74 | 3.35 (1.92–5.87) | 1.15 (0.79–1.68) |
| ≥ 75 | 3.56 (1.97–6.42) | 1.90 (1.36–2.64) |
| Male | ||
| ≤ 14 | 0.10 (0.06–0.15) | 0.50 (0.40–0.62) |
| 15–24 | 0.86 (0.70–1.06) | 0.76 (0.62–0.94) |
| 25–34 | 1.00 | 1.00 |
| 35–44 | 1.19 (0.98–1.45) | 1.16 (0.97–1.38) |
| 45–54 | 1.38 (1.12–1.68) | 1.27 (1.06–1.54) |
| 55–64 | 1.42 (1.13–1.75) | 1.60 (1.32–1.93) |
| 65–74 | 1.35 (1.05–1.73) | 1.39 (1.12–1.73) |
| ≥ 75 | 1.88 (1.43–2.48) | 1.32 (1.00–1.68) |
| Sex | ||
| Female | 1.00 | 1.00 |
| Male | 5.31 (4.57–6.17) | 2.77 (2.51–3.03) |
| Month of occurrence | ||
| January | 2.23 (1.67–2.97) | 4.48 (3.56–5.70) |
| February | 2.14 (1.60–2.86) | 2.71 (2.10–3.52) |
| March | 1.49 (1.08–2.03) | 2.08 (1.58–2.72) |
| April | 1.51 (1.09–2.05) | 1.22 (0.90–1.63) |
| May | 1.38 (1.00–1.90) | 1.17 (0.87–1.58) |
| June | 1.22 (0.89–1.70) | 1.19 (0.88–1.60) |
| July | 1.07 (0.77–1.51) | 1.06 (0.78–1.44) |
| August | 1.00 | 1.00 |
| September | 1.35 (0.98–1.86) | 1.60 (1.21–2.14) |
| October | 1.75 (1.30–2.39) | 2.27 (1.75–2.97) |
| November | 1.67 (1.23–2.27) | 2.59 (2.01–3.39) |
| December | 2.18 (1.65–2.94) | 3.71 (1.89–4.76) |
Note: CI = confidence interval, IRR = incident rate ratio. Statistically significant results are shown in boldface. *Mutually adjusted for age group, sex, and month and year of occurrence.