Table 2

Demographic and sleep characteristics across groups
Non-OSA Mild OSA Mod OSA P-value Group differences
Sample size 7 11 10
Age, y 46.0 (5.7) 51.1 (6.8) 52.2 (8.6) 0.25 ns
Male, % 4 (57.1) 4 (36.4) 8 (80.0) 0.15 ns
BMI,(kg/m2) 30.5 (5.6) 30.0 (3.2) 28.4 (3.2) 0.54 ns
ESS, units 12.0 (4.3) 9.3 (6.4) 11.5 (4.2) 0.58 ns
Polysomnography Data
TST, min 404.0 (61.6) 401.3 (44.0) 395.7 (47.9) 0.73 ns
Sleep efficiency % 85.1 (13.3) 88.0 (6.2) 84.7 (11.3) 0.85 ns
N1 sleep % 15.1 (8.8) 17.1 (8.8) 18.6 (6.8) 0.46 ns
N2 sleep % 44.5 (12.6) 37.5 (13.2) 41.5 (7.5) 0.56 ns
N3 sleep % 26.5 (12.3) 32.3 (13.7) 26.5 (8.2) 0.60 ns
R sleep % 13.9 (5.3) 13.2 (5.3) 13.4 (4.1) 0.98 ns
Arousals, events/h 18.7 (7.9) 22.8 (5.8) 30.6 (8.7) 0.02 Mod > Non-OSA
AHI 2.8 (1.4) 9.4 (3.0) 18.3 (3.6) <0.0001 Mod > Mild
Mean NREM O2% sat 94.4 (1.8) 93.7 (2.1) 94.6 (1.0) 0.48 ns
Minimum sleep O2% sat 89 (12.0) 83.5 (6.75) 85 (8.0) 0.233 ns

Data presented as mean (standard deviation) unless otherwise specified. Mod, moderate OSA; BMI, body mass index; ESS, Epworth Sleepiness Score; TST, total sleep time; Sleep efficiency, percentage of TST per total recording time; N1-N3 sleep, NREM sleep stages; R sleep, REM sleep stage; sat, saturation; AHI, Apnea-Hypopnea Index; ns, non-significant; Mod, moderate OSA.

Schönwald et al.

Schönwald et al. BMC Neuroscience 2012 13:89   doi:10.1186/1471-2202-13-89

Open Data