Table 3.
Performance Evaluation of the Sleep/Wakefulness Detection Algorithm in Different AHI Groups
| AHI Group | N | SE (%) | SEN (Sleep) | SPC (Awake) | F1 | ACC | κ |
|---|---|---|---|---|---|---|---|
| AHI < 5 | 27 | 78.3 ± 13.1 | 89.34 ± 6.78 | 78.23 ± 15.57 | 90.44 ± 5.47 | 86.38 ± 6.39 | 0.60 ± 0.14 |
| 5 ≤ AHI <15 | 20 | 75.5 ± 14.7 | 87.73 ± 9.22 | 69.58 ± 22.14 | 87.92 ± 5.96 | 82.94 ± 7.63 | 0.52 ± 0.19 |
| 15 ≤ AHI < 30 | 21 | 76.6 ± 14.5 | 87.62 ± 12.24 | 73.32 ± 17.78 | 88.34 ± 9.02 | 83.82 ± 9.02 | 0.56 ± 0.19 |
| AHI ≥ 30 | 20 | 74.8 ± 18.9 | 84.09 ± 16.07 | 61.56 ± 17.42* | 83.41 ± 15.85 | 80.41 ± 10.30 | 0.43 ± 0.18* |
Notes: SE was statistically similar across AHI groups. *Adjusted p-value <0.05 compared to healthy group (AHI<5). The results are reported as mean ± standard deviation.
Abbreviations: AHI, apnea/hypopnea index; SE, sleep efficiency; SEN, sensitivity; SPC, specificity; F1, F1 score; ACC, accuracy; κ, Cohen’s kappa coefficient.