Time-dependent S-wave areas by 24-hour ECG are correlated with a high risk of sudden cardiac death: ECG prediction model development and validation for SCD risk.

Although, in the independent testing set, inteS_mean and t_T did not reach statistical significance at some of these time points ( Figure 4C ), inteS_mean at 21:39 and t_T at 19:23 significantly differed between the SCDHR and HC groups in both the training and independent test set ( Figure 4D ).

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