Table 3.

Correlation between devices.

Platform measures with...	Intraclass correlation: consistency (95% CI)	Intraclass correlation: agreement (95% CI)	Pearson correlation (95% CI)
HRa from 12-lead ECGb	0.88 (0.79-0.93)	0.85 (0.69-0.92)	0.87 (0.79-0.93)
HR (lead I)	0.75 (0.59-0.85)	0.74 (0.58-0.84)	0.75 (0.60-0.85)
HR (lead II)	0.79 (0.65-0.87)	0.77 (0.62-0.87)	0.79 (0.66-0.88)
QTcc interval from 12-lead ECG	0.40 (0.14-0.61)	0.38 (0.13-0.59)	0.43 (0.17-0.63)
QTc interval (lead I)	0.42 (0.16-0.63)	0.33 (0.02-0.57)	0.43 (0.17-0.63)
QTc interval (lead II)	0.41 (0.15-0.62)	0.34 (0.05-0.57)	0.41 (0.14-0.62)
QT interval from 12-lead ECG	0.68 (0.49-0.80)	0.66 (0.48-0.80)	0.69 (0.52-0.82)
QT interval (lead I)	0.53 (0.30-0.70)	0.43 (0.09-0.66)	0.54 (0.31-0.71)
QT interval (lead II)	0.56 (0.34-0.73)	0.49 (0.17-0.70)	0.56 (0.34-0.73)

^aHR: heart rate.

^bECG: electrocardiogram.

^cQTc: corrected QT.