TableĀ 3

Diagnostic performance of Omron and Merlin single-lead ECGs for detecting atrial fibrillation

n=999 Prevalence 7.9%InterpretationOmron single-lead ECG (95% CI)Merlin single-lead ECG (95% CI)
Sensitivity (%)Cardiologist: 195 (82 to 99)97 (85 to 100)
295 (82 to 99)91 (77 to 98)
390 (77 to 97)98 (87 to 100)
498 (87 to 100)88 (74 to 96)
Specificity (%)Cardiologist: 175 (71 to 79)76 (71 to 80)
298 (96 to 99)95 (93 to 97)
397 (96 to 99)92 (89 to 94)
495 (92 to 97)91 (88 to 94)
Positive likelihood ratioCardiologist: 13.8 (3.2 to 4.6)3.99 (3.3 to 4.8)
241.8 (22.5 to 77.5)18.8 (12.2 to 28.8)
335.8 (20.3 to 63.1)11.5 (8.5 to 15.6)
418.5 (12.6 to 27.2)10.1 (7.4 to 13.9)
Negative likelihood ratioCardiologist: 10.07 (0.02 to 0.28)0.04 (0.01 to 0.26)
20.05 (0.01 to 0.21)0.09 (0.03 to 0.27)
30.098 (0.04 to 0.25)0.03 (0.004 to 0.18)
40.02 (0.004 to 0.17)0.13 (0.06 to 0.3)
Positive predictive valueCardiologist: 124.1 (17.4 to 31.9)24.5 (17.6 to 32.5)
277.8 (62.9 to 88.8)60.4 (46.0 to 73.5)
376.0 (61.8 to 86.9)50.6 (39.3 to 61.9)
462.1 (49.3 to 73.8)47.4 (36.0 to 59.1)
Negative predictive valueCardiologist: 199.4 (97.9 to 99.9)99.7 (98.3 to 100)
299.5 (98.3 to 99.9)99.3 (97.9 to 99.8)
399.1 (97.8 to 99.8)99.8 (98.7 to 100)
499.8 (98.8 to 100)98.9 (97.3 to 99.6)