Table 5.
The difference (in ms) between the visual scores (average detection of two visual scorers) and the automatic onset detection per patient.
| COPD | fSE-EMGdi | fSE-EMGdi-LMS | RMSp |
|---|---|---|---|
| 1 | 101 ± 286 | 99 ± 302 | 220 ± 276 |
| 2 | 211 ± 260 | 233 ± 214 | 239 ± 186 |
| 3 | 157 ± 276 | 138 ± 226 | 223 ± 302 |
| 4 | 309 ± 422 | 204 ± 280 | 174 ± 222 |
| 5 | 222 ± 296 | 204 ± 210 | 255 ± 224 |
| 6 | 199 ± 194 | 180 ± 205 | 209 ± 181 |
| 7 | 80 ± 238 | 47 ± 221 | 89 ± 321 |
| 8 | 129 ± 136 | 163 ± 148 | 183 ± 177 |
| 9 | 30 ± 112 | 47 ± 110 | 139 ± 136 |
| Mean ± SD | 159 ± 261 | 152 ± 218 | 196 ± 221 |
fSE-EMGdi: fixed sample entropy (fSE) estimated over the EMGdi signal. fSE-EMGdi-LMS: fSE estimated over filtered EMGdi signal using an LMS-based adaptive algorithm. fSE was calculated using m = 1, tolerance values r = 0.3 × standard deviation of EMGdi free of electrocardiographic interference and overlapping sliding windows of 0.25 s. RMSp: root mean square given by the recording system.