Correction in articles by Massó-van Roessel et al. "Analysis of the Association Between Electrocardiographic P-wave Characteristics and Atrial Fibrillation in the REGICOR Study", Rev Esp Cardiol. 2017;70:841-847, and by Baena-Díez et al. "Validity Assessment of Low-risk SCORE Function and SCORE Function Calibrated to the Spanish Population in the FRESCO Cohorts", Rev Esp Cardiol. 2018;71:274-282.