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Incidence of acute mountain sickness in UK Military Personnel on Mount Kenya

Lookup NU author(s): Dr David Woods


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Background Acute mountain sickness (AMS) is a common problem of trekkers to high altitude. The UK military train at high altitude through adventurous training (AT) or as exercising troops. The ascent of Point Lenana at 4985 m on Mount Kenya is frequently attempted on AT. This study sought to establish the incidence of AMS within this population, to aid future planning for military activities at altitude.Methods A voluntary questionnaire was distributed to all British Army Training Unit Kenya based expeditions attempting to ascend Mount Kenya during the period from February to April 2014. The questionnaire included twice daily Lake Louise and Borg (perceived exertion scale) self-scoring. All expeditions were planned around a 5-day schedule, which included reserve time for acclimatisation, illness and inclement weather.Results Data were collected on 47 participants, 70% of whom reached the summit of Point Lenana. 62% (29/ 47) self-reported AMS (defined as Lake Louise score (LLS) = 3) on at least one occasion during the ascent, and 34% (10/29) suffered severe AMS (LLS = 6). Those who attempted the climb within 2 weeks of arrival in Kenya had a higher incidence of AMS (12/15 (80%) vs 17/32 (53%), p= 0.077). Participants recording a high Borg score were significantly more likely to develop AMS (16/18 vs 9/21, p= 0.003).Conclusions This represents the first informative dataset for Mount Kenya ascents and altitude. The incidence of AMS during AT on Mount Kenya using this ascent profile is high. Adapting the current ascent profile, planning the ascent after time in country and reducing perceived exertion during the trek may reduce the incidence of AMS.

Publication metadata

Author(s): Hazlerigg A, Woods DR, Mellor AJ

Publication type: Article

Publication status: Published

Journal: Journal of the Royal Army Medical Corps

Year: 2016

Volume: 162

Issue: 6

Pages: 465-469

Print publication date: 01/12/2016

Online publication date: 28/11/2016

Acceptance date: 03/10/2015

ISSN (print): 0035-8665

ISSN (electronic): 2052-0468

Publisher: BMJ Publishing Group

DOI: 10.1136/jramc-2015-000524


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