Table 3.

Crude and adjusted ORs for altitude mountain sickness incidence; mutivariate analysis. (n=302)

	Crude OR	95% CI	Adjusted OR*	95% CI
Smoking status
Non-smoker	1 (Ref)		1 (Ref)
Smokers	0.51	0.28 to 0.89	0.54	0.31 to 0.97
Gender
Male	1 (Ref)		1 (Ref)
Female	1.58	1.06 to 2.36	1.53	1.06 to 2.25
Maximum altitude reached
≤3400 masl	1 (Ref)		1 (Ref)
>3400 masl	1.80	1.23 to 2.63	1.78	1.25 to 2.59

*Adjusted by age and the remaining variables in the left column.

masl, metres above sea level.