Table 1.

Performance analysis of implant loosening detection built upon, input–output coherence correlation and different output spectrum features.

	Coherence correlation (%)	New peak in (750–900 Hz) (%)	Peak shift in (700–1200 Hz) (%)	Peak shift in (1200–2200 Hz) (%)	Peak flattening (%)
Sensitivity	91.67 ± 0.03	77.2 ± 6.8	53.1 ± 13.7	66.2 ± 9.0	51.0 ± 4.6
Specificity	92.86 ± 0.00	78.9 ± 3.9	74.3 ± 10.5	43.9 ± 5.8	84.6 ± 10.2
Accuracy	92.26 ± 0.01	78.0 ± 3.5	63.0 ± 5.8	57.2 ± 8.1	67.3 ± 6.0

The mean and standard deviation of each metric were obtained over repeated measurements over 14 legs