Interviewers asked, "When did you have your most recent breast MRI?" Respondents could answer either in terms of a calendar date (which was recorded in BMRILDMO and BMRILDYR) or in terms of a time period and number of units for that time period (e.g., 3 months ago) (recorded in BMRILTP and BMRILNO).

Respondents who failed to give a complete response in terms of either the month and year or in terms of the number and time period format were asked to estimate the number of years since their last breast MRI test (BMRILGYR).

The various responses on time since most recent breast MRI are recoded into a common grouped year format in BMRILGYRR.