Effects of experience and commercialisation on survival in Himalayan mountaineering: retrospective cohort study.

Choice of peak was clearly associated with altered odds of death (omnibus P<0.001); year of expedition was associated with a significant trend toward reduced odds of death (0.98, 0.96 to 0.99, P=0.011).

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There’s one route up there, we’ve all got to use it, and we’ve all got to be considerate about one another, and lots of people attribute many deaths to the incompetence of people blocking up the route.” 15 Even so, an overall trend toward increasing success rates in summiting Mount Everest without an associated rise in death supports the contention that professionally guided climbs could actually improve safety overall.

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