Table 1.

Descriptive statistics on Spanish female and male subjects.

Clinical variables	Female (n=129)		Male (n=254)
	Mean (SD)	Range	Mean (SD)	Range
Apnea-hypopnea index	14.6 (17.0)	0-108.4	22.3 (19.0)	0-87
Weight, in kg	78.0 (18.0)	45-165	92.4 (16.6)	61-162
Height, in cm	161.1 (6.4)	148-178	175.8 (6.9)	160-194
Body mass index, in kg/m2	30.1 (6.9)	18.6-63.7	29.9 (4.9)	20.1-52.3
Age, in years	50.9 (11.6)	25-88	48.2 (11.9)	21-78
Cervical perimeter, in cm	36.7 (2.9)	30-45	42.5 (3.2)	34-53