Table 3 Summary of impedance spectroscopy accuracy in predicting several parameters established from physical examination, ultrasonography, and manometry.
From: Non-invasive obstetric anal sphincter injury diagnostics using impedance spectroscopy
Parameter | Sens. [%] | Spec. [%] | Accuracy [%] | Cohen’s kappa |
|---|---|---|---|---|
Sphincter tension | 70.0 | 75.0 | 72.7 | 0.448 |
Active sphincter contraction | 70.0 | 80.0 | 75.5 | 0.499 |
Up to 50% of the external sphincter torn | 76.0 | 88.3 | 82.7 | 0.646 |
More than 50% of the external sphincter torn | 73.3 | 85.0 | 82.7 | 0.521 |
Presence of internal sphincter torn | 70.0 | 90.0 | 86.4 | 0.530 |
Average resting pressure | 55.0 | 80.0 | 70.9 | 0.349 |
Maximal contraction pressure | 72.0 | 80.0 | 76.4 | 0.520 |
Duration of effective contraction | 70.0 | 84.7 | 82.7 | 0.383 |
