Table 1.

Comparisons of Tibetans, Andeans, and Ethiopians in responses to high altitude

	Tibetans	Andeans	Ethiopians
Basal metabolic rate	Normal	Normal	Unknown
Maximum oxygen consumption	Normal	Normal	Unknown
Ventilation (L/min)	15	10.5	Unknown
Hypoxia ventilatory response	Higher	Lower	Unknown
Oxygen saturation of hemoglobin	Lower	Higher	Highest
Hemoglobin	Lower	Higher	Lower
Arterial oxygen content	Lower	Higher	Highest
Pulmonary artery pressure	Lower	Higher	Lower
Pulmonary nitric oxide production	Higher	Lower	Higher
Peripheral capillary density	Higher	Lower	Unknown
Oxygen dissociation	Normal	Normal	Normal
CMS (prevalence)	1.2%	8 to 15%	No reports