- At least one year of baseline period and continuous enrollment for at least 12 months prior to index date Individuals with NVAF who were using oral anticoagulants (i.e., warfarin, dabigatran, rivaroxaban and apixaban) within the study period beginning Jan 1, 2012 through December 31, 2013 or last date of the last data cut available at the time of execution of the study