Intentional drowning | Unintentional drowning | Intentional drowning versus unintentional drowning | |||||
---|---|---|---|---|---|---|---|
Total cases (N = 450) | Annual mortality rate per 100,000 | Relative Risk (CI) | Total cases (N = 1765) | Annual mortality rate per 100,000 | Relative Risk (CI) | χ2 (p-value) | |
Season | |||||||
Summer | 139 | 0.28 | 1.5 (1.1–1.9) | 692 | 1.42 | 1.6 (1.5–1.9) | 10.6 (p = 0.001)a |
Autumn | 95 | 0.19 | 1* | 422 | 0.85 | 1* | 1.6 (p = 0.236) |
Winter | 102 | 0.20 | 1.1 (0.8–1.4) | 252 | 0.50 | 0.6 (0.5–0.7) | 18.8 (p < 0.001)a |
Spring | 114 | 0.23 | 1.2 (0.9–1.6) | 399 | 0.81 | 1.0 (0.8–1.1) | 1.5 (p = 0.234) |
Day of death | |||||||
Sunday | 63 | 0.03 | 1.4 (0.9–2.0) | 294 | 0.15 | 0.9 (0.8–1.1) | 1.9 (p = 0.196) |
Monday | 75 | 0.04 | 1.6 (1.1–2.4) | 211 | 0.11 | 0.7 (0.6–0.8) | 7.1 (p = 0.009) |
Tuesday | 65 | 0.03 | 1.4 (1.0–2.1) | 257 | 0.13 | 0.8 (0.7–0.9) | 0.0 (p = 1.000) |
Wednesday | 76 | 0.04 | 1.7 (1.2–2.4) | 229 | 0.12 | 0.7 (0.6–0.8) | 4.6 (p = 0.038) |
Thursday | 65 | 0.03 | 1.4 (1.0–2.1) | 236 | 0.12 | 0.7 (0.62–0.9) | 0.4 (p = 0.539) |
Friday | 60 | 0.03 | 1.3 (0.9–1.9) | 214 | 0.11 | 0.7 (0.6–0.8) | 0.5 (p = 0.472) |
Saturday | 46 | 0.02 | 1* | 324 | 0.16 | 1* | 17.5 (p < 0.001)b |
Day of week | |||||||
Weekend | 109 | 0.19 | 1* | 618 | 3.82 | 1* | 18.9 (p < 0.001)c |
Weekday | 341 | 0.24 | 3.1 (2.5–3.9) | 1147 | 1.14 | 1.9 (1.7–2.1) | |
Country of birth | |||||||
Australia | 261 | 0.18 | 1* | 1070 | 0.18 | 1* | 1.1 (p = 0.332) |
Overseas | 189 | 0.36 | 2.0 (1.7–2.4) | 695 | 0.36 | 1.8 (1.6–2.0) |