Cohort Attrition Study Results Part IV: SSDQA Comparison

- An additional attrition criteria requiring patients to have 2 or more SCA diagnoses was added as a proxy for lab confirmed diagnoses. Lab-confirmed diagnoses were not evaluated due to separate data quality issues with lab result values. - Most sites did not experience significant patient loss, but Nationwide lost a significant number of patients after this criteria was applied. - Subsequent analyses revealed this significantly improved covariate population in the cohort and addressed other DQ concerns, so we found this was a positive result.