Table 2. TWA Profile on Admission and Discharge According to PCR Swab Result^*.

PCR result	Admission, mean ± SD (µV)	P value	Discharge, mean ± SD (µV)	P value
PCR-positive (n = 76)	42.47 ± 26.52	0.757	53.45 ± 34.42	0.030
PCR-negative (n = 34)	44.72 ± 38.21		25.15± 17.64

*Independent t-test. TWA: T-wave alternans; PCR: polymerase chain reaction; SD: standard deviation.