Table 3

Diagnostic accuracy for bradypnoea, tachypnoea, bradycardia, tachycardia

True positives (%)False positives (%)True negatives (%)False negatives (%)Sensitivity (%)Specificity (%)PPV (%)NPV (%)
Bradycardia
 Complete dataset824 (71)363 (1)55 148 (99)339 (1)71996999
 Filtered dataset*24 (72)0 (0)3953 (100)9 (0)73100100100
Tachycardia
 Complete dataset7111 (90)1490 (3)47 321 (97)752 (2)90978398
 Filtered dataset*496 (98)65 (2)3413 (98)12 (0)989888100
Bradypnoea
 Complete dataset2113 (24)562 (1)47 438 (99)6561 (12)24997988
 Filtered dataset*134 (33)8 (0)3587 (100)272 (7)331009493
Tachypnoea
 Complete dataset16 210 (84)14 602 (39)22 694 (61)3168 (12)84615388
 Filtered dataset*1225 (94)1029 (38)1668 (62)79 (5)94625495
  • *Dataset after applying a median filter.

  • NPV, negative predictive value; PPV,  positive predictive value.