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Restricted cubic spline plots based on univariate Cox proportional hazards models for the associations between the eGFRdiff and the risk of AF recurrence. The results are presented as hazard ratios (HRs, solid lines) and 95% confidence intervals (CIs, light red areas). The knots were set at the 10th, 50th, and 90th percentiles of the eGFRdiff. The histograms represent the distribution of the eGFRdiff in our study.
Abbreviation: AF, atrial fibrillation.
