Table 4.
Sensitivity (Se), specificity (Sp), positive predictive value (PPV), negative predictive value (NPV) and accuracy (ACC) of the comparison between automatic smartphone corrected position and validated PSG position.
| Automatic Smartphone Accelerometry Corrected Position | ||||||
|---|---|---|---|---|---|---|
| Position | Se (%) | Sp (%) | PPV (%) | NPV (%) | Acc (%) | |
| Validated Hospital Position | Right | 89.9 | 99.7 | 98.3 | 97.9 | 98.0 |
| Supine | 98.2 | 95.2 | 96.0 | 97.8 | 96.8 | |
| Left | 98.8 | 97.5 | 93.1 | 99.6 | 97.8 | |
| Prone | 38.9 | 100.0 | 100.0 | 98.8 | 98.8 | |
| Stand | 85.7 | 99.9 | 94.6 | 99.8 | 99.7 | |
| Average | 82.3 | 98.5 | 96.4 | 98.8 | 98.2 | |