Table 3.

Electrocardiogram characteristics (polarity).

Variables, Units		Lead	Standard ECG	Smartwatch ECG	Concordance (%)	p-Value
Polarity (Positive/Negative), n	P Wave	I	100/0	100/0	100%	-
		II	99/1	99/1	100%	0.001
		III	93/7	94/6	99%	0.001
	QRS Complex	I	94/6	94/6	100%	0.001
		II	88/12	87/13	99%	0.001
		III	54/46	53/47	99%	0.001
	T Wave	I	82/18	81/19	99%	0.001
		II	83/17	84/16	99%	0.001
		III	70/30	72/28	98%	0.001