Table 3.
Diagnostic accuracy for bradypnoea, tachypnoea, bradycardia, tachycardia
| True positives (%) | False positives (%) | True negatives (%) | False negatives (%) | Sensitivity (%) | Specificity (%) | PPV (%) | NPV (%) | |
| Bradycardia | ||||||||
| Complete dataset | 824 (71) | 363 (1) | 55 148 (99) | 339 (1) | 71 | 99 | 69 | 99 |
| Filtered dataset* | 24 (72) | 0 (0) | 3953 (100) | 9 (0) | 73 | 100 | 100 | 100 |
| Tachycardia | ||||||||
| Complete dataset | 7111 (90) | 1490 (3) | 47 321 (97) | 752 (2) | 90 | 97 | 83 | 98 |
| Filtered dataset* | 496 (98) | 65 (2) | 3413 (98) | 12 (0) | 98 | 98 | 88 | 100 |
| Bradypnoea | ||||||||
| Complete dataset | 2113 (24) | 562 (1) | 47 438 (99) | 6561 (12) | 24 | 99 | 79 | 88 |
| Filtered dataset* | 134 (33) | 8 (0) | 3587 (100) | 272 (7) | 33 | 100 | 94 | 93 |
| Tachypnoea | ||||||||
| Complete dataset | 16 210 (84) | 14 602 (39) | 22 694 (61) | 3168 (12) | 84 | 61 | 53 | 88 |
| Filtered dataset* | 1225 (94) | 1029 (38) | 1668 (62) | 79 (5) | 94 | 62 | 54 | 95 |
*Dataset after applying a median filter.
NPV, negative predictive value; PPV, positive predictive value.