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. 2015 Feb 10;350:h418. doi: 10.1136/bmj.h418

Table 2.

 Key parameters correlated with good and poor outcome in 160 children who drowned with cardiac arrest and hypothermia. Univariate analysis odds ratio are for having good outcome

No of children No (%, 95% CI) with good outcome No (%, 95% CI) with poor outcome OR (95% CI) P value
Number of children 160 17 (11, 6 to 15) 143 (89, 85 to 94)
Total duration of advanced life support (minutes):
 ≤30 62 (39%) 17 (27, 16 to 39) 45 (73, 61 to 84) <0.001
 >30 98 (61%) 0 (0, 0 to 3) 98 (100, 97 to 100)
Season:
 Winter 17 (11%) 5 (29, 8 to 51) 12 (71, 49 to 92) 4.55 (1.37 to 15.09) 0.008
 Other seasons 143 (89%) 12 (8, 4 to 13) 131 (92, 87 to 96)
Initial cardiac arrest rhythm:
 No of children with data 118 14 104
 Asystole 101 (86%) 8 (8, 3 to 13) 93 (92, 87 to 97) 0.13 (0.04 to 0.46) 0.001
 Bradycardia 15 (13%) 6 (40, 15 to 65) 9 (60, 35 to 85)
 Ventricular fibrillation 2 (2%) 0 (0, 0 to 66) 2 (100, 34 to 100)