GDPPR-SNOMED Subset Analysis

Key Findings

• GDPPR consists of a small proportion of the SNOMED universe (3.7%)
• ‘Ethnic group’ and ‘Life style’ semantic tags show 60-80% coverage while all other semantic tags are below 25% with majority near 0%.
• Descendant code coverage were higher (~90%) among ‘Medications’, ‘Patient factors’, ‘Vaccinations and immunisations’ and ‘Declines contraindications and other exceptions’ cluster categories but low (~40%) for ‘Diagnoses and findings’.
• Coverage for codes mappable to CTV-3 were higher for ‘Respiratory disorders’ (60%) and ‘Neoplasms and cancers’ (40%) CTV-3 chapters.

Datasets

• SNOMED lookup
• GDPPR Refset
• GDPPR and descendants (derived from child-codes)
• CTV-3 to SNOMED mapping

Coverage between datasets

GDPPR vs SNOMED Universe

• Numerator: GDPPR SNOMED codes
• Denominator: SNOMED universe

By top-level and semantic tags

GDPPR vs GDPPR & descendants

• Numerator: GDPPR SNOMED codes
• Denominator: GDPPR SNOMED codes and their descendant codes

By cluster category

GDPPR within mappable CTV-3 codes

• Numerator: GDPPR SNOMED codes mappable from CTV-3
• Denominator: SNOMED codes mappable from CTV-3

By CTV-3 chapter

By CTV-3 subchapter