2007, Piran, Slovenia

Cold water immersion
Table 1. Breakdown of the UKNIIS data by gender and age
Age
(years)
Range
Number of cases
Male Female Unknown
Dead Alive Dead Alive Dead Alive
0-9 4 (11.4%) 31 0 (0%) 5 (1) 0 1
10-19 10 (4.6%) 207 4 (11.1%) 32 0 4
20-29 22 (7.1%) 287 3 (5.5%) 52 0 8
30-39 20 (8.1%) 226 4 (6.6%) 57 0 3
40-49 34 (19.5%) 140 (1) 5 (%) 46 0 2
50-59 18 (17.6%) 84 (1) 3 (57.1%) 18 1 1
60-69 8 (15.7%) 43 (1) 0 (33.3%) 7 0 2
70+ 9 (60%) 6 2 (66.7%) 3 0 0
Unknown 9 (5.8%) 145 4 (18.2%) 18 0 1
Total = 134 Total = 25 Total = 1
The numbers in brackets represent the number of cases with unknown outcomes, in that age
and gender group.
Table 2. Breakdown of data by water temperature.
Water Temp Number of Number of Death Rate at Percentage of
(°C)
Cases Deaths Water Temp Total Deaths
1 – 8 289 36 12.5% 22.5%
9 – 11 338 48 14.2% 30%
12 – 14 365 29 7.9% 18.1%
15 – 17 358 25 7% 15.6%
18 + 94 4 4.3% 2.5%
Unknown 149 18 12.1% 11.3%
Table 3 shows the predicted times for ‘50% survival’ that appeared in the original report by
Oakley and Pethybridge (1997, N=930). The buoyancy device variable was coded into
“worn” and “not worn”. It should be noted that the predicted time for ‘50% survival’ is the
time period of immersion at which half of those immersed would be expected to survive. The
corresponding data reanalysed for 1,593 cases is presented in Table 4.
Table 3. 50% Survival time from UKNIIS 1997 (N=930)
Water Temperature Not Worn Worn
5°C 3 17
10°C 6 >24
15°C 12 >24
341