“…Opioid prescription rate and quantity 90 days before and after THA was calculated for both propensity matched control and EDS. Opioid prescription rate was determined by patients receiving a prescription for opioids within the prescribed time, and quantity was compared after conversion of opioid to morphine milliequivalent dose (mme), which is similar methodology to prior arthroplasty opioid studies [ 23 , 24 ]. In comparing the duration of opioids, we classified patients into 2 categories, those who did not receive opioid prescriptions within 90 days after the operation, and those who were prescribed opioids at 365 days.…”