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Introduction to the National Public Health Language

Introduction to the National Public Health Language. David Bawden. NPHL: concept. single language suitable for indexing and retrieval of public health material applicable to: databases and websites bibliographic material and datasets ISO thesaurus format Multites software

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Introduction to the National Public Health Language

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  1. Introduction to the National Public Health Language David Bawden

  2. NPHL: concept • single language suitable for indexing and retrieval of public health material • applicable to: • databases and websites • bibliographic material and datasets • ISO thesaurus format • Multites software • links and mappings to other languages

  3. ISO thesaurus format • alphabetical list of terms • term relations • synonym: USE/USE FOR • hierarchy: BROADER / NARROWER TERM • association: RELATED TERM • term explanation, definition: SCOPE NOTE

  4. NPHL: initial idea • integration of Public Health Information Thesaurus [HDA] PHITS classification [APHO] • the two significant UK public health languages

  5. HAD thesaurus • HDA websites and databases • thesaurus format (SY, BT/NT, RT, SN) • 1400 terms, 400 synonyms • generally consistent, but • some errors • 25% of terms not in hierarchy • many (570) main sections

  6. PHITS(Public Health Information Tagging System) • three-level hierarchical classification • 350 tags with descriptions • highly structured, with 7 main sections • no synonyms or related terms • highly consistent • topic coverage similar to HP

  7. PHITS example Morbidity and mortality Endocrine diseases Other endocrine MAM

  8. NPHL: extended idea • add links to Government Category List DoH taxonomy • broader scope languages, but both covering public health topics

  9. Government Category List • for all UK government web-sites • ‘category list’, but in thesaurus format • very wide subject scope • 360 terms, 1200 synonyms • generally consistent • only partially relevant

  10. DoH Taxonomy • top levels of DoH thesaurus • ISO thesaurus format • 19 main headings • many terms, but limited number relevant

  11. NPHL objectives • retain all concepts in HDA and PHITS • retain general structure of PHITS • allow access by existing HDA and PHITS terms where possible • links to relevant DoH and GCL terms • thesaurus format (ISO standard) • Multites software

  12. NPHL development (so far..) scoping study, interviews • creation of first draft version evaluation, RFC • creation of second draft version further evaluation, further comments • minor amendments • Multites implementation

  13. NPHL: first draft version • PHITS tags put into thesaurus form • HDA and PHITS terms put into single language, but kept as separate terms linked by RTs • HDA errors and inconsistencies corrected • PHITS terms modified for clarity and to remove ambiguity • DoH and GCL terms mapped by RT

  14. Evaluation of NPHL first draft • concept is proved • need to fully integrate the language • remove separate HDA/PHITS structures • create ‘tighter’ structure with fewer main sections • remove inconsistencies, which are concentrated in a few sections

  15. NPHL: second draft version • residual HDA and PHITS structure removed • PHITS structure described in scope notes • integrated language with minimal inconsistencies • DoH and GCL terms still mapped by RTs

  16. NPHL: second draft version • main sections reduced to 10 [possibility of decimal notation] • main sections (except [1]) map to either PHITS headings or DoH taxonomy terms • errors and ambiguities corrected • two sections reworked: • morbidity and mortality • healthcare professions

  17. After evaluation.. • some further minor modifications to individual terms • online Multites implementation • 1571 terms, 340 synonyms

  18. Example NPHL term COMPLEMENTARY MEDICINE SN Treatments used alongside orthodox medical treatment UF Complementary treatments BT HEALTH SERVICES NT HOMEOPATHY CHIROPRACTIC RT MEDICINE

  19. NPHL main sections 1 HEALTH, PUBLIC HEALTH AND HEALTH PROMOTION 2 ROOT CAUSES OF ILL HEALTH 3 DEATH, DISEASE AND DISABILITY 4 PEOPLE AND POPULATIONS 5 SETTINGS AND PLACES 6 HEALTH SERVICES AND THEIR MANAGEMENT 7 PUBLIC HEALTH METHODS AND RESEARCH 8 COMMUNICATION AND KNOWLEDGE 9 TIME FACTORS 10 EQUIPMENT

  20. NPHL can be found at.. http://www.nphl.nhs.uk OR http://www.multites.com follow link ‘web thesaurus’ NPHL is listed as: ‘National Public Health Language’

  21. NPHL: a work in progress • revision of high-level structure • better names for main sections • re-ordering of sections • revision of disease sections • better placement for methodology, equipment … • etc.

  22. NPHL: future prospects • taxonomy drawn from top terms • classification notation ? • integration with revised GCL • integration with MeSH, Snomed ..

  23. Thanks to... • Claira Bannon • Marta Calonge Contreras • Peter Cornelissen • Phil Defriez • Stella Dextre Clarke • Julian Flowers • Astero Kanaris • Geoff Powell

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