Table 1. Characteristics of the study population.

Data are presented as mean ± standard deviation. The Student's t-test was used to assess statistical significance regarding gender differences in the measured variables. A p-value of <0.05 was considered significant.

Parameters	Males (n=135)	Female (n=35)	P-value	Total Study Population (n=170)
Age, years	51.7 ± 14.0	53.8 ± 12.5	0.430	52.2 ± 13.7
Height, m	1.73 ± 0.07	1.60 ± 0.06	<0.001	1.71 ± 0.09
Weight, kg	88.0 ± 15.6	83.0 ± 20.8	0.043	86.5 ± 16.9
BMI, kg/m2	29.1 ± 5.0	31.4 ± 6.8	0.041	30.6 ± 5.4
Waist circumference (WC), cm	105.6 ± 12.2	103.4 ± 14.5	0.368	105.1 ± 12.7
Waist circumference-to-height ratio (WHr), cm/m	0.61 ± 0.07	0.65 ± 0.09	0.004	0.62 ± 0.08
Neck circumference (NC), cm	41.9 ± 3.9	38.2 ± 3.9	<0.001	41.1 ± 4.2
Neck circumference-to-height ratio (NHr), cm/m	24.2 ± 2.4	23.9 ± 2.6	0.517	24.1 ± 2.49
Apnea-hypopnea index (AHI), events/hour	42.1 ± 19.7	33.3 ± 16.4	0.017	40.3 ± 19.4