Evaluation of diagnostic accuracy of the portable Embletta device using kappa statistics
| Kappa coefficient value | p-value | |
| Validation study | ||
| Emb:A+H ma and PSG:AHI | 0.62 | <0.001 |
| Emb:A+H ma and PSG:(A+H)·h−1 bed | 0.62 | <0.001 |
| Emb:A+H ma and Emb:A+H fl | 0.69 | <0.001 |
| Emb:A+H fl and PSG:(A+H)·h−1 bed | 0.57 | <0.001 |
| Emb:A+H ma and Emb:A+H au | 0.35 | 0.003 |
| Emb:A+H au and PSG:(A+H)·h−1 bed | 0.28 | 0.01 |
| Prospective study | ||
| Emb:A+H ma and PSG:AHI | 0.50 | <0.001 |
| Emb:A+H ma and PSG:(A+H)·h−1 bed | 0.54 | <0.001 |
| Emb:A+H ma and Emb:A+H au | 0.17 | 0.03 |
| Emb:A+H au and PSG:(A+H)·h−1 bed | 0.10 | 0.16 |
Emb:A+H ma: apnoeas and hypopnoeas score of manual Embletta scoring per hour in bed
(hypopnoea score is based on nasal pressure and thoraco-abdominal changes); PSG:AHI: polysomnographic apnoeas and hypopnoeas score per hour slept
PSG:(A+H)·h−1 bed: polysomnographic apnoeas and hypopnoeas score per hour in bed
Emb:A+H fl: apnoeas and hypopnoeas score based on manual Emletta scoring per hour in bed
hypopnoea score is based on nasal pressure changes alone)
Emb:A+H au: apnoeas and hypopnoeas score of automated Embletta software analysis