Table 4.
Disposition of legacy immunization data
| Disposition of legacy immunization data | Immunization Count (%) | Patients affected |
|---|---|---|
| Records transferred appropriately | 500,906 (99.16%) | 59,486 |
| • Unique immunization records | 490,735 (97.7%) | 59,486 |
| • Legacy duplicate immunizations | 7155 (1.43%)+ | 3723 |
| Records transferred inappropriately | 3015 (0.6%) | 797 |
| • Novel duplicate immunizations | 3015 (0.6%)+ | 797 |
| Records not transferred | 1189 (0.24%) | 556 |
| • Patient validation error | 334 (0.07%) | 52* |
| • Crosswalk validation error | 73 (0.01%) | 66 |
| • Date validation error (before birth) | 716 (0.14%) | 404 |
| • Date validation error (in future) | 6 (0.00%) | 3 |
| • Duplication error | 60 (0.01%)+ | 31 |
| All records | 502,095 (100%) | 59,538 |
* No immunization records were transferred for these patients. Lack of matching birthdates between the systems was the primary reason.
+ The duplication error alert did not occur during data migration for the vast majority of duplicate immunizations