Association between new-onset AHRE and PWD
Logistic regression analysis revealed the existence of a correlation between PWD and new-onset AHRE with a 11% relative risk increase for each millisecond of PWD [hazard ratio (HR): 1.11; 95% confidence interval (CI): 1.06–1.17; p < 0.0001] (Table 3) but not so for SSS (HR: 1.6; 95% CI: 0.44–5.8; p =0.48) nor left atrium diameter (HR: 0.94; 95% CI: 0.84–1.1; p =0.26). The maximum and minimum P-wave durations were not included in this analysis because they were considered to be strong confounding factors of PWD. The cutoff points of PWD for the prediction of new-onset AHRE was determined from the ROC curve of the logistic regression analysis (Figure 4). The most powerful cutoff point was 48 ms, with a sensitivity of 0.738 and specificity of 0.779, for the PWD (area under the curve: 0.90; p <0.0001).