Anthropometric data of the subjects
| Subjects n | Age yrs | BMI kg·m−2 | Sex M:F | Neck circ. cm | AHI | |
| Whole group | 202 | 49.4±11.7 | 29.5±5.9 | 161:41 | 41.3±3.9 | 19.1±22.4 |
| Non-OSAS | 160 | 48.5±11.9 | 28.6±5.0 | 122:38 | 40.6±3.8 | 12.0±16.5 |
| OSAS | 42 | 53.0±10.4 | 33.2±7.3 | 39:3 | 43.7±3.3 | 46.2±21.6 |
| p-value | <0.001 | 0.02 | <0.001 | 0.02 | <0.001 | <0.001 |
BMI: body mass index
M: males
F: females
Neck cir.: neck circumference
AHI: apnoea/hypopnoea index
OSAS: obstructive sleep apnoea index
The p-values were obtained by the Chi-squared test for number of the subjects, Fisher's exact test for the sex ratio and by unpaired t-test for age, BMI, neck circ. and AHI