| Primary snoring | Obstructive sleep apnoea | p-value | |
| Subjects | 76 (27.2) | 203 (72.8) | |
| Respiratory parameters | |||
| AHI events·h−1 | 0.4±0.3 | 8.1±9.6 | <0.001 |
| Oxygen saturation % | 97.6±1.2 | 96.7±1.9 | <0.001 |
| SCR score | |||
| SCS | 6.3±2.9 | 9.4±2.5 | <0.001 |
| Other alternative scores | |||
| Score 1 | 4.06±1.8 | 5.4±1.5 | <0.001 |
| Score 2 | 5.2±2.4 | 7.1±2.2 | <0.001 |
| Score 3 | 6.0±2.5 | 6.8±2.1 | <0.001 |
| Score 4 | 4.4±2.4 | 5.6±2.2 | <0.001 |
| Score 5 | 5.1±2.1 | 5.3±1.9 | NS |
| Score 6 | 7.6±3.2 | 9.1±2.8 | <0.001 |
Data are presented as n (%) or mean±sd, unless otherwise stated. p-values calculated by t-test. AHI: apnoea/hypopnoea index; SCS: sleep clinical score; NS: not significant.