> Through self-reporting, we found 214 individuals who claimed that they owned cats but no other pet (Cat group), while 214 individuals who did not own a pet we

> Through self-reporting, we found 214 individuals who claimed that they owned cats but no other pet (Cat group), while 214 individuals who did not own a pet were matched with the Cat group by gender, body mass index (BMI), and age (no cat (NC) group) Somewhat tangential question, but what algorithm would you use in order to pick the control group here? And what if instead I wanted to build the largest control group that still matched the features of my test group?