LAS duration < 30 ms with J-wave present: 18 LAS duration > 30 ms with J-wave present: 9 LAS duration < 30 ms with J-wave absent: 4 LAS duration > 30 ms with J-wave absent: 17 Likelihood ratio=11.386 (p=0.00074) LAS denotes low amplitude signal

Table 1: Electrocardiographic characteristics.