Table 2– Selected data on sleep and breathing in subjects examined with polygraphy in the European Sleep Apnoea Database (ESADA) cohort
FemaleMaleTotal
AHI events·h−116.9±21.1 (929)25.7±23.9 (2316)23.2±23.5 (3245)
Sleep apnoea
 None, AHI <533.218.222.5
 Mild, AHI 5–<1530.826.428.6
 Moderate, AHI 15–<3019.222.220.4
 Severe, AHI ≥3016.833.228.5
ODI events·h−114.5±20.8 (788)22.3±23.4 (1860)19.9±22.9 (2648)
Mean Sa,O2 %93.8±4.3 (918)93.2±3.4 (2267)93.4±3.7 (3185)
Lowest Sa,O2 %82.5±9.4 (914)80.8±9.5 (2259)81.3±9.5 (3173)
Subjective sleep time min359.2±97.7 (580)365.2±98.0 (1427)363.4±97.9 (2007)
Analysed sleep time min439.2±53.1 (843)432.2±61.5 (2002)434.2±59.2 (2845)
  • Data are presented as mean±sd (n) or %. AHI: apnoea/hypopnoea index; ODI: oxygen desaturation index; Sa,O2: arterial oxygen saturation.