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.