Table 7.

Correlation and root mean squared error (RMSE) statistics of the digitised results from 44 printed and scanned paper ECGs and the ground truth digital ECGs (validation 3).

Lead name	Correlation				Root l
	Average	SD	p-value	95% confidence interval	Average	SD	p-value	95% confidence interval
I	0.968	0.016	$<0.001$	0.962–0.973	0.968	0.016	$<0.001$	0.962–0.973
II	0.972	0.014	$<0.001$	0.967–0.976	0.968	0.016	$<0.001$	0.962–0.973
V1	0.977	0.013	$<0.001$	0.973–0.981	0.968	0.016	$<0.001$	0.962–0.973
V2	0.973	0.025	$<0.001$	0.965–0.980	0.968	0.016	$<0.001$	0.962–0.973
V3	0.969	0.042	$<0.001$	0.957–0.982	0.968	0.016	$<0.001$	0.962–0.973
V4	0.974	0.012	$<0.001$	0.971–0.978	0.968	0.016	$<0.001$	0.962–0.973
V5	0.973	0.013	$<0.001$	0.969–0.977	0.968	0.016	$<0.001$	0.962–0.973
V6	0.974	0.014	$<0.001$	0.970–0.978	0.968	0.016	$<0.001$	0.962–0.973