Before randomization the interval between the AF episodes was less than 7 days in more
than 50% of the patients in all study groups (P = 0.49 for differences
between the groups). In the RFA, AAD and crossover group the duration
of the AF episodes were less than 24 h in 86%, 91% and 93% of the
patients, respectively (P = 0.57) (Table 2)