Table 3.
Breakdown of Scores for Individual Top End Sleepiness Scale Questions with Cronbach’s α and Split Half Reliability Value
| Question Number | Median (IQR) | Mean (95% CI) | Cronbach’s α | Spearman Correlation |
|---|---|---|---|---|
| TESS-1 (n=64) | 0 (0, 1) | 0.55 (0.35, 0.74) | 0.80 | |
| TESS-2 (n=65) | 0 (0, 1) | 0.58 (0.37, 0.8) | 0.76 | |
| TESS-3 (n=65) | 1 (0, 2) | 1.4 (1.12, 1.68) | 0.79 | |
| TESS-4 (n=65) | 0 (0, 1) | 0.78 (0.54, 1.03) | 0.75 | |
| TESS-5 (n=65) | 1 (0, 1) | 0.89 (0.63, 1.16) | 0.78 | |
| TESS-6 (n=65) | 1 (1, 3) | 1.55 (1.28, 1.82) | 0.77 | |
| TESS Total (n=83) | 5 (3, 7) | 5.49 (4.62, 6.37) | 0.81 | |
| Odd Half (n=64) | 2 (1, 4) | 2.86 (2.31, 3.41) | 0.71 | |
| Even half (n=65) | 3 (1, 4) | 2.92 (2.34, 3.51) |
Abbreviations: TESS, Top End Sleepiness Scale; IQR, interquartile range.