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Effect of Personality Traits on Development of Acute Mountain Sickness in Rapid Entry Population.

Background: To investigate the effect of personality traits on development of acute mountain sickness (AMS).

Methods: One hundred and eighty-nine healthy male subjects transported from the plain area (Chengdu, China) to a high altitude area (Tibet, China) were enrolled in this study. Ninety-six subjects experienced AMS within two days after arriving at Tibet plateau (AMS group), while the remaining 93 subjects did not (healthy control without AMS group). The symptoms of AMS, state-trait anxiety and personality traits of the subjects were assessed using self-assessment and AMS questionnaire (Chinese criteria).

Results: The AMS group had a significantly higher prevalence of self-assessed anxiety, compared with the healthy control without AMS group. Personality traits estimation based on data obtained by Eysenck Personality Questionnaire revealed higher neuroticism and extraversion scores in the AMS group. Neuroticism, extraversion and anxiety level expressed highly significant level of mutual concordance.

Conclusion: Anxiety level is the highest in subjects with AMS and it corroborates with the neuroticism and extraversion level from the Eysenck scale. Psychological disturbances and extraversion can affect the development of AMS in a rapid entry population. The high trait-anxiety and personality traits are helpful for people with these characteristics to deal with the stress, and decrease the risk of developing AMS.

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