Table 1

 Baseline data during stable NREM sleep on optimal CPAP in patients with and without OSA

Obese OSA(n = 10)Non-snorers(n = 15)
NREM, non-rapid eye movement; OSA, obstructive sleep apnoea; CPAP, continuous positive airway pressure; V̇i, ventilation; Vt, tidal volume; TI/TTOT, duty cycle; FB, breathing frequency; PIF, peak inspiratory flow; Petco2, end-tidal partial pressure of CO2, PEPI, epiglottic pressure; EMGGG, genioglossal electromyography;
Data shown as mean (SE) values.
*p<0.05 between groups.
i (l/min)*7.6 (0.5)6.3 (0.2)
Vt (l)0.47 (0.02)0.43 (0.02)
FB (breaths/min)16.3 (0.9)14.9 (0.6)
TI/TTOT0.43 (0.02)0.40 (0.01)
VT/TI (l/s)0.30 (0.02)0.26 (0.01)
PIF (l/s)0.48 (0.02)0.42 (0.02)
Petco2 (mm Hg)41.2 (1.1)43.9 (0.7)
CPAP (cm H2O)*11.5 (0.7)5.7 (0.5)
PEPI (cm H2O)−2.48 (0.4)−1.48 (0.2)
EMGGG Peak (%max)2.8 (1.1)4.1 (1.0)
EMGGG Tonic (%max)1.0 (0.4)1.3 (0.4)