Table 1.

Variables considered for determining the interval between submission of Form FDA 1572 to BMIS database.

Variable	Description
Newid	Assigned based on a unique first and last name combination
Obs	Data were ordered by receipt date and assigned a sequential number
Firsub	This is the minimum receipt date for a newid- their first submission receipt date and the date on which an investigator is plotted
Secdiff	This is the difference between the receipt date and Firsub for observation 2; i.e., number of days until the second submission
Oad	This is a flag. 1 is assigned if the maximum observations for a newid = 1