eTable. Complicating factors for all electrical injury patients and separate for adults (≥ 18 years) and children.

Variable	All patients (n = 268)	Adults (n = 153)	Children (n = 153)
Initial unconsciousness (%)	0.7 (n = 2)	0.7 (n = 1)	0.9 (n = 1)
Burns (%) I II III IV	10.1 (n = 27) 1.9(n = 5) 7.1 (n = 19) 0.7 (n = 2) 0.4 (n = 1)	6.5 (n = 10) 1.3 (n = 2) 4.6 (n = 7) – 0.7 (n = 1)	14.8 (n = 17) 2.6 (n = 3) 10.4 (n = 12) 1.7 (n = 2) –
Concomitant injuries (%)	4.2 (n = 11)	6.2 (n = 9)	1.8 (n = 2)
Admission ECG showing cardiac arrhythmias (%)	26.1 (n = 70)	24.2 (n = 37)	28.7 (n = 33)
Lab results on admission (% elevated) elevated troponin elevated CK CK-MB >10%	0.7 (n = 2) 18.7 (n = 50) 2.2 (n = 6)	1.3 (n = 2) 26.1 (n = 40) 2.0 (n = 3)	– 8.7 (n = 10) 2.6 (n = 3)

CK, creatine kinase; CK-MB, creatine kinase-myocardial band