Altitude Sickness Incidence
Facts about high altitude illness:
- About 67% of people who rapidly ascend to altitudes of 12,000 feet or more will develop symptoms of high altitude illness.
- About 12% of people develop symptoms of high altitude illness at an altitude of 9,000 feet.
Continue to Altitude Sickness Risk Factors
- Basnyat B, Murdoch DR. High-altitude illness. Lancet. 2003 Jun 7;361(9373):1967-74. 
- Foster PP, Feiveson AH, Boriek AM. Predicting time to decompression illness during exercise at altitude, based on formation and growth of bubbles. Am J Physiol Regul Integr Comp Physiol. 2000 Dec;279(6):R2317-28. 
- Gallagher SA, Hackett PH. High-altitude illness. Emerg Med Clin North Am. 2004 May;22(2):329-55, viii. Review. 
- Gertsch JH, Basnyat B, Johnson EW, Onopa J, Holck PS. Randomised, double blind, placebo controlled comparison of ginkgo biloba and acetazolamide for prevention of acute mountain sickness among Himalayan trekkers: the prevention of high altitude illness trial (PHAIT). BMJ. 2004 Apr 3;328(7443):797.