Table 3

Sleep study data

Nasal maskFull face maskp‐value
Patients n1616
TST min339±56300±79<0.05
Sleep efficiency %78±970±14<0.05
Sleep latency min20±2421±13NS
Stage 1/2 % TST70±1267±12NS
Slow wave sleep % TST12±1111±10NS
REM %TST18±822±8<0.02
AHI events·h−11.7±3.41.6±2.4NS
Minimum average Sa,O2
 TST %93.4±2.192.8±2.50.09
 NREM %93.6±2.093.0±2.4<0.05
 REM %92.4±2.992.0±3.5NS
Arousal index arousals·h−115.6±9.815.8±8.8NS
  • Results expressed as mean±SD unless otherwise stated

  • TST: total sleep time

  • REM: rapid eye movement sleep

  • AHI: apnoea-hypopnoea index

  • Sa,O2: arterial oxyhaemoglobin saturation

  • NREM: nonrapid eye movement sleep

  • NS: nonsignificant