| With sleepiness | Without sleepiness | p‐value | Total |
Subjects n | 52 | 42 | | 94 |
Age yrs | 47±9 | 42±10 | <0.01 | 45±10 |
Sex male % | 75 | 88 | NS | 81 |
Body mass index kg·m−2 | 29±4.2 | 27±3.9 | <0.05 | 28±4 |
Habitual snorer % | 96 | 93 | NS | 95 |
Apnoeas observed % | 54 | 48 | NS | 51 |
Morning fatigue % | 73 | 48 | <0.05 | 62 |
Nocturia % | 44 | 19 | <0.05 | 33 |
Epworth sleepiness scale | 12±3.1 | 6.1±1.6 | <0.001 | 9.2±3.8 |
Hypertension % | 25 | 12 | NS | 19 |
TST min | 252±66 | 281±64 | <0.05 | 265±66 |
Sleep time lost % of TST# | 4.7±13 | 11±21 | NS | 7.5±17 |
Wake during sleep % | 33±15 | 28±14 | NS | 31±15 |
Light sleep % | 41±10 | 37±8.6 | NS | 39±10 |
Deep sleep % | 18±11 | 24±10 | <0.01 | 20±11 |
REM sleep % | 8.6±5.8 | 11±5.7 | <0.05 | 9.7±5.9 |
Arousal index | 46±21 | 31±17 | <0.001 | 39±21 |
RERA index | 16±10 | 3.8±4.3 | <0.001 | 11±10 |
Apnoea/hypopnoea index | 6.1±6.9 | 3±4.8 | <0.05 | 4.7±6.2 |
RERA index ≥5/ ≥10/ ≥15 %¶ | 88/69/52 | 29/12/2.4 | <0.001/<0.001/0.001 | 62/44/30 |
RDI ≥10/ ≥15/ ≥20 %+ | 77/69/54 | 19/9.8/4.8 | <0.001/<0.001/0.001 | 51/43/32 |
SA O2 <90% % of TST | 8.7±21 | 2±4.7 | <0.05 | 5.7±16 |