P-wave analysis
Findings of the P-wave analysis are summarized in Table 2. In the univariate analysis, the P-wave durations in leads II and V1, respectively, were longer in the AHRE group than in the non-AHRE group (118 ± 24 vs. 109 ± 22 ms; p =0.04 for lead II and 111 ± 26 vs. 95 ± 20 ms; p =0.005 for lead V1) and the maximum P-wave duration was similarly longer in the AHRE group than in the non-AHRE group (132 ± 22 vs. 117 ± 13; p =0.0009). The PWD was also longer in the AHRE group than in the non-AHRE group (63 ± 13 vs. 38 ± 14; p =0.001) (Table 2).