Table 2.

Performance of noise-adapted and standard model on noise-augmented test set ECGs across different types of noise.

Model	Noise	SNR	PPV	NPV	Specificity	Sensitivity	AUROC (95% CI)	AUPRC
Noise-adapted	None	N/A	0.203	0.990	0.676	0.924	0.896 (0.886–0.905)	0.455
	Portable ECG	0.5	0.152	0.993	0.523	0.956	0.871 (0.861–0.882)	0.392
	Portable ECG	2	0.188	0.992	0.636	0.940	0.889 (0.880–0.899)	0.439
	Electrode motion	0.5	0.126	0.993	0.395	0.971	0.858 (0.846–0.869)	0.361
	Electrode motion	2	0.167	0.991	0.579	0.945	0.885 (0.875–0.895)	0.426
	Muscle artifact	0.5	0.175	0.989	0.608	0.927	0.871 (0.861–0.882)	0.389
	Muscle artifact	2	0.194	0.990	0.654	0.930	0.891 (0.881–0.900)	0.449
	Baseline wander	0.5	0.186	0.990	0.634	0.932	0.883 (0.873–0.893)	0.427
	Baseline wander	2	0.201	0.991	0.669	0.929	0.892 (0.883–0.902)	0.457
Standard	None	N/A	0.207	0.988	0.688	0.910	0.895 (0.884–0.905)	0.475
	Portable ECG	0.5	0.091	0.981	0.132	0.972	0.723 (0.706–0.739)	0.200
	Portable ECG	2	0.125	0.991	0.398	0.958	0.834 (0.822–0.847)	0.329
	Electrode motion	0.5	0.088	0.988	0.079	0.990	0.792 (0.779–0.806)	0.239
	Electrode motion	2	0.152	0.988	0.537	0.925	0.855 (0.843–0.866)	0.333
	Muscle artifact	0.5	0.100	0.991	0.210	0.979	0.807 (0.795–0.820)	0.245
	Muscle artifact	2	0.181	0.988	0.631	0.912	0.864 (0.853–0.875)	0.344
	Baseline wander	0.5	0.095	0.993	0.158	0.987	0.802 (0.789–0.816)	0.236
	Baseline wander	2	0.169	0.986	0.599	0.908	0.855 (0.843–0.866)	0.322

SNR signal-to-noise ratio, PPV positive predictive value, NPV negative predictive value, AUROC area under receiver operating characteristic curve, CI confidence interval, AUPRC area under precision-recall curve.