CRP and atrial fibrillation: Importantly, our study population shows several differences: (i) in ethiology, as almost one-third of the total study population and 43% of the unfavorable outcome subgroup presented with atrial fibrillation on admission; (ii) inflammatory status, as CRP an NLR were higher in patients with poor 90-day outcome; and (iv) metabolic status, as plasma glucose level was significantly elevated among patients with poor outcome.