TABLE III:
Results of the ablation (Abl.) and permutation (Perm.) global explanation studies. Change in percentage of samples predicted as AF is reported for each class. Cross-validation variability is reported in terms of standard deviation.
| Feature | Total | S | A | O | Z | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| Abl. | Perm. | Abl. | Perm. | Abl. | Perm. | Abl. | Perm. | Abl. | Perm. | |
| Seg 0 | −0.18±0.68 | −1.52±0.81 | 0.22±0.25 | −0.08±0.14 | −3.70±2.97 | −14.40±6.95 | 0.37±1.11 | −0.46±0.73 | −2.51±1.82 | −2.16±1.35 |
| Seg 1 | 0.47±0.26 | −0.22±0.50 | 0.06±0.17 | 0.20±0.27 | 2.11±0.87 | −7.14±5.26 | 0.91±0.41 | 0.95±0.41 | −0.35±1.35 | 0.72±1.43 |
| Seg 2 | 0.35±0.40 | 0.22±0.50 | 0.08±0.07 | 0.28±0.34 | 1.45±2.61 | −4.89±3.67 | 0.54±0.77 | 1.41±0.46 | 0.72±1.82 | 2.89±3.73 |
| Seg 3 | −0.26±0.30 | 0.87±0.64 | 0.02±0.17 | 0.41±0.33 | −1.97±2.88 | −0.67±4.92 | −0.21±0.57 | 2.53±1.00 | −1.07±0.87 | −1.08±4.22 |
| Seg 4 | −0.38±0.29 | 1.84±1.06 | −0.14±0.16 | 0.75±0.85 | −2.51±1.64 | −2.38±3.47 | −0.21±0.71 | 5.71±1.70 | −0.36±1.34 | −0.34±2.64 |
| Seg 5 | −0.02±0.30 | 0.63±0.79 | 0.00±0.11 | 0.30±0.37 | −0.79±2.71 | −5.02±3.37 | 0.08±0.59 | 3.19±1.73 | 0.71±1.44 | 0.01±2.81 |
| Seg 6 | 1.37±0.46 | −1.06±0.78 | 0.41±0.10 | −0.02±0.16 | 4.88±2.55 | −17.56±4.40 | 2.28±0.71 | 1.78±1.60 | 1.45±1.77 | 0.34±3.50 |
| Seg 7 | −0.59±0.47 | −3.87±0.55 | 0.47±0.20 | −0.35±0.12 | −10.03±3.16 | −33.92±5.65 | 0.25±1.47 | −1.86±0.35 | −1.44±2.08 | −3.59±2.54 |
| Seg 0, 1 | −1.34±1.31 | 0.36±0.46 | −0.04±0.24 | 0.10±0.34 | −13.58±8.67 | −2.51±3.27 | −0.08±1.74 | 1.53±0.87 | −2.51±1.82 | 2.88±1.84 |
| Seg 1, 2 | 0.08±0.47 | 0.21±0.36 | 0.14±0.25 | 0.20±0.29 | −1.18±3.62 | −2.25±3.65 | 0.41±1.12 | 1.20±0.61 | −0.36±1.78 | −1.43±3.28 |
| Seg 2, 3 | −1.52±0.37 | 1.42±0.81 | −0.22±0.11 | 0.83±0.45 | −10.95±1.68 | 0.65±4.44 | −1.24±1.63 | 3.19±1.66 | −2.16±2.89 | −1.09±4.64 |
| Seg 3, 4 | −2.16±0.41 | 2.20±1.17 | −0.22±0.20 | 1.02±0.54 | −17.67±4.32 | 1.18±3.85 | −1.33±1.02 | 5.34±2.54 | −2.52±3.72 | −0.72±2.43 |
| Seg 4, 5 | −1.95±0.47 | 1.34±0.70 | −0.18±0.13 | 0.61±0.36 | −16.88±2.99 | −2.12±2.11 | −1.08±1.45 | 4.27±1.69 | −1.08±0.47 | −1.44±2.11 |
| Seg 5, 6 | 1.52±0.48 | −0.18±0.38 | 0.73±0.12 | 0.26±0.28 | 3.29±3.08 | −10.16±3.87 | 2.48±0.80 | 1.95±1.28 | 2.86±2.44 | 0.72±1.82 |
| Seg 6, 7 | −1.16±1.78 | −0.13±0.38 | 0.51±0.42 | 0.81±0.43 | −17.57±9.78 | −14.12±2.52 | 0.54±2.61 | 1.99±0.72 | −1.79±4.12 | 2.52±2.92 |
| Seg 7, 0 | −6.92±0.60 | 1.10±0.56 | 0.12±0.35 | 1.48±0.48 | −66.63±4.16 | −8.32±2.92 | −3.40±0.91 | 3.27±0.86 | −3.23±2.10 | 1.08±1.45 |
| R-R variability | −6.88±0.40 | 5.58±0.94 | −0.37±0.07 | 9.75±0.84 | −65.70±2.34 | −38.52±3.58 | −2.44±1.30 | 12.67±0.90 | −3.97±3.12 | −2.90±4.38 |