Evaluating the Performance of Driver's License Agencies Using a Standardized Donor Ratio

Department of Motor Vehicles (DMV) facilities are assessed based on the proportion of patrons who consent to donate. To evaluate the individual characteristics that may influence donation consent, we analyzed the most recent transactions of 9,767,839 patrons of 203 Ohio DMVs between January 1, 2014 and November 17, 2018. Patron age, gender, donor designation, and DMV location were linked via patron zip codes with census tract data on race, ethnicity, income, and education. The Standardized Donor Designation Ratio (SDDR) (the observed number of donors at each DMV divided by the expected number of donors based on patron demographic characteristics) was calculated. Altogether 5,769,561 DMV patrons (59.1%) were designated as donors. Donor designation was independently associated with younger age, female gender, nonblack race, Hispanic ethnicity, and higher income. Across 203 DMVs, the percent donors ranged from 33% to 73%, and SDDRs ranged from 0.7 to 1.61. The correlation between the 2 measures demonstrated that 47% of the variation in SDDR was explained by percent donors. In conclusion, across DMVs there is substantial variation in organ donor designation rates. SDDRs that adjust for DMV patron characteristics may distinctly and more accurately describe individual DMV facility success in promoting organ donation.