Table 2:

Proportion of people who survived complete burial in avalanches, by duration of burial

Duration of burial, min	Canada		Switzerland		p value*
	No. extricated	No. (%) who survived	No. extricated	No. (%) who survived
≤ 10	124	111 (89.5)	236	221 (93.6)	0.95†
11–20	47	17 (36.2)	142	101 (71.1)	< 0.001†
21–35	29	7 (24.1)	107	47 (43.9)	0.34†
≥ 36	101	4 (4.0)	461	75 (16.3)	0.009†
All	301	139 (46.2)	946	444 (46.9)	0.87‡

^*Mantel–Haenszel test for comparison of proportions of survivors stratified by duration of burial: p < 0.001.

^†Pearson χ² test (with Bonferroni correction) for comparison of proportions of survivors in different intervals of burial durations.

^‡Pearson χ² test.