Cardioversion within the first four weeks.

* The P value is for the comparison between groups and is based on the Chi-Square test† Odds ratio was adjusted for age, sex, diabetes, ischemic heart disease, chronic heart failure, liver disease, bleeding, cancer, chronic kidney disease, chronic obstructive pulmonary disease, stroke, peripheral arterial disease, dronedarone, amiodarone, flecainide, verapamil, antiplatelets, NSAID and acetylsalicylic acid.‡ Fisher's exact test.§ Predicted probabilities are calculated from for characteristics of an average person of both sexes as found in Table 1.Cardioversion within the first four weeks.