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Table 2 A summary of pre/post coordination in encoding free text value

From: A method for encoding clinical datasets with SNOMED CT

No Encoding Unique Synonyms Total Percentage
1. Pre-coordination 1,471 3,181 48,102 81.77%
2. Post-coordination 468 691 1,373 2.33%
3. Ambiguous 4 4 5 0.01%
4. Requires post-coordination 693 693 1,002 1.70%
5. Requires verification 342 342 3,634 6.18%
6. Incorrect syntax or encoding 121 155 250 0.42%
7. Unencoded 3,370 3,370 3,956 6.72%
8. Unencodeable 146 146 507 0.86%
  Totals 6,615 8,582 58,829 100.00%