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Summary of Duplications Found in 165 Random Records
| System | Records with Matches | Duplications (Rate) | Representational Variants (Rate) |
|---|---|---|---|
| READ | 158 | 0.00* | N/A |
| SNOMED | 158 | 22 (13.9%)* | 8 (5.1%) |
| UMLS | 144 | 6 (4.2%)* | N/A |
Two-by-two comparison of duplications shows significance for all pairings:
READ-SNOMED χ2 = 23.65, df = 2 p <.00001
SNOMED-UMLS χ2 = 8.53, df = 2 p <.004
UMLS-READ χ2 = 6.72, df = 2 p <.01
