Table 2.

Frequency of altitude mountain sickness by tobacco consumption, age, gender and maximum altitude reached; univariate analysis (n=302)

Altitude mountain sickness
	n (%)	p Value
Non-smokers	68 (29.2)	0.01*
Smokers	10 (14.5)
Tobacco consumption in Smokers
Mean (SD)†	13.50 (1.63)	0.01‡
Age
Mean (SD)†	39.40 (1.43)	0.17‡
Gender
Male	31.7%	0.02*
Female	68.3%
Maximum altitude reached (masl)
Mean (SD) †	3601.40 (780.18)	<0.01‡

*χ² test.

‡Mann-Whitney U test.

†Quantitative variables were expressed in mean (SD).

masl, metres above sea level.