Table 1. Mean differences and standard deviation (SD) of differences between the smartwatch and the reference in the resting and ambulatory BP tests.

	Overall	Resting BP study n = 85			Ambulatory BP study n = 35
		SBP (mmHg)	DBP (mmHg)		SBP (mmHg)	DBP (mmHg)
aThis criterion is fulfilled if the mean value of the difference is within or equal to ± 5 mmHg, and the standard deviation is < 8 mmHg. bThis criterion is fulfilled if the SDs of the subjects are below 6.9 and 6.73 mmHg, respectively. Criterion 2 is not required for ambulatory measurement study. Abbreviations: BP, Blood Pressure; DBP, diastolic blood pressure; SBP, systolic blood press.
Criterion 1a	MD ± SD	−0.683 ± 6.203	1.628 ± 5.028		−1.943 ± 5.475	3.195 ± 5.862
	P	0.723	0.183		0.923	0.065
Criterion 2b	MD ± SD	−0.683 ± 5.3642	1.628 ± 4.468		-	-
	P	0.838	0.440		-	-