Table 3.

Table displays the mean QTc values and SD (obtained from ECGs 1.1 to 4.1 and Holter ECG) for children undergoing further diagnostic investigation.

	N	Mean ± SD	Minimum–Maximum
ECG 1.1 QTc ms	27	452.5 ± 13.1	435–476
ECG 2.1 QTc ms	25	458.5 ± 19.1	435–511
ECG 3,1 QTc ms	21	462.2 ± 20.9	441–520
ECG 4.1 QTc ms	12	457.0 ± 11.2	442–482
ECG Holter, QTc ms	18	452.9 ± 26.2	417–538

Legend: ECG, electrocardiogram; SD, standard deviation.