Table 6.

Correlation and root mean squared error (RMSE) statistics of the digitised results from selected 51 3 by 1 ECG images and the ground truth digital ECGs (validation 2).

Lead name	Correlation				Root mean squared error
	Average	SD	p-value	95% confidence interval	Average	SD	p-value	95% confidence interval
I	0.942	0.027	$<0.001$	0.935–0.950	0.049	0.017	$<0.001$	0.045–0.054
II	0.971	0.015	$<0.001$	0.967–0.975	0.045	0.023	$<0.001$	0.038–0.051
V1	0.988	0.009	$<0.001$	0.985–0.990	0.031	0.011	$<0.001$	0.028–0.034