Table 4.

The pairwise mean absolute difference between the left and right wristbands.

Measure	Valid sample sizea (pairs)		Mean absolute difference (SD)
	Measurements, n	Subjects, n
HRb (bpmc)	108	23	0.6 (0.8)
HRV SDNNd (ms)	102	23	6 (10)
HRV RMSSDe (ms)	101	23	9 (10)
RRf (brpmg)	48	23	1 (2)

^aValid sample size refers to the number of measurements and subjects where two wristband recordings (pairs) from the same subject were available.

^bHR: heart rate.

^cbpm: beats per minute.

^dHRV SDNN: heart rate variability standard deviation of normal-to-normal intervals.

^eHRV RMSSD: heart rate variability root mean square of successive differences.

^fRR: respiratory rate.

^gbrpm: breaths per minute.