Design and conduct of Caudwell Xtreme Everest: an observational cohort study of variation in human adaptation to progressive environmental hypoxia

Table 2 Laboratory altitude, mean barometric pressure, mean laboratory temperature and inspired partial pressure of oxygen.

Laboratory	Approx Altitude metres	Ambient Temperature ˚C	Barometric Pressure millibar	Barometric Pressure mmHg	Barometric Pressure Kpa	PiO₂mmHg	PiO₂Kpa
LONDON	75	24.1 (1)	1005	754 (10)	100.5 (1.3)	148.0	19.7
KATHMANDU	1300	26.1 (1.5)	867	650 (3)	86.7 (0.4)	126.2	16.8
NAMCHE	3500	19.6 (2.6)	670	505 (3)	67.3 (0.4)	95.4	12.7
PHERICHE	4250	13.1 (1.7)	615	461 (2)	61.5 (0.3)	86.7	11.6
EBC	5300	21.5 (5.6)	538	404 (3)	53.8 (0.3)	74.7	9.9
WCWM	6400	12.7 (3.9)	467	350 (0.9)	46.7 (0.1)	63.4	8.5
SOUTH COL	7950	15.0 (8.9)	389	292 (2.3)	38.9 (0.3)	51.3	6.8
BALCONY	8400	Not recorded	363	272	36.3	47.1	6.3

Altitudes taken from map values to nearest 50 m; Barometric pressures and temperature are mean (standard deviation) values recorded during laboratory testing in the field; PiO2 = Inspired partial pressure of oxygen -calculated from barometric pressures.

ISSN: 1471-2288