Table 3.
Univariate Correlations
| Correlation of GDSa with: | r | p Value |
|---|---|---|
| Body Mass Index | 0.072 | 0.633 |
| Epworth Sleepiness Scale | 0.102 | 0.532 |
| Profile of Mood States, subscale | ||
| Depression | 0.138 | 0.378 |
| Fatigue | 0.153 | 0.329 |
| Tension | 0.090 | 0.562 |
| Anger | −0.033 | 0.833 |
| Confusion | 0.047 | 0.766 |
| Vigor | −0.057 | 0.717 |
| Apnea Hypopnea Index | 0.046 | 0.763 |
| Average oxygen saturation | −0.192 | 0.200 |
| % of time at Sao2 < 90% | 0.236 | 0.114 |
| Total Arousal Index | 0.100 | 0.515 |
| Sleep stage, % | ||
| 1 | 0.292 | 0.049 |
| 2 | −0.283 | 0.056 |
| SWS | 0.091 | 0.546 |
| REM | −0.183 | 0.223 |
| WASO, min | 0.094 | 0.540 |
a
Global deficit score (GDS): each individual test score is computed into a deficit score and the average of those scores is the GDS. Higher GDS scores indicate poorer performances. SWS refers to slow-wave sleep; REM, rapid eye movement sleep; WASO, wake after sleep onset.