Table 2—

Polysomnographic findings in obstructive sleep apnoea syndrome patients with and without excessive daytime sleepiness(EDS)

EDSNo EDSp-value
Subjects n2317
TST min401±41379±63ns
Sleep latency min11±1618±180.05
Sleep efficiency %90±782±130.04
Awake min37±2966±560.03
Arousal index65±2060±24ns
Respiratory arousals n58±2057 ±22ns
AHI events·h−162±1860±20ns
Apnoea duration s29±822±70.008
PLMI events·h−13±12±1ns
Sleep %
 Phase 1/281±1278±11ns
 Phase 3/46±88±5ns
 REM13±614 ±8ns
Nocturnal Sa,O2 %
 Minimum69±1279±80.002
 Mean87±690±50.01
  • Data are presented as mean±sd, unless otherwise stated. TST: total sleep time; ns: nonsignificant; AHI: apnoea–hypopnoea index; PLMI: periodic limb movement index; REM: rapid eye movement; Sa,O2: arterial oxygen saturation.