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SLAM Clinical records
~250 000 patient records
18 million free text documents
Available for research via the CRIS
project
Information Extraction (IE)
Patient ID Diagnosis Age Address
1 Depression 31 Flat 1, XYZ road
2 Cancer 67 2 Another Lane
3 Heart Attack 58 78 A place
42%
58%
Unique Medications per
Patient
69%
31%
Unique Diagnosis per
Patient
11%
89%
Unique MMSE Scores per
Patient
Structured
Free text
Negative symptoms of
psychosis
Deficits of normal emotional behaviour
Social withdrawal
Anhedonia (inability to experience pleasure)
Poverty of speech
Etc.
Less treatable by medication
Greater affect on quality of life
Example sentences
‘Patient X has poor eye contact’
‘I assessed the patient on 01/03/12. I noted
that eye contact was poor’
‘Saw patient X yesterday. Eye contact was
bad, even worse than before’
‘I spoke to patient X over the telephone, and
was thus unable to assess eye contact’
‘Patient X presented with the same level of
eye contact as on our last meeting’
Support Vector Machines
SVM produces hyperplane to classify unseen examples
Outputs
Excel/CSV
Knowtator format (for Arc)
Gate XML
Direct to database
Psychosis Symptomatology
app P R F1
Apathy 0.85 1 0.93
Blunted/Flat affect 1 0.74 0.84
Concrete thinking 0.97 0.6 0.74
Emotional withdrawal 0.78 0.76 0.77
Motivation 0.75 0.63 0.68
Poverty of speech 0.81 0.87 0.84
Rapport 0.85 1 0.91
Social withdrawal 0.9 1
Anhedonia 0.96 0.83 0.89
Associations 1 0.87 0.94
Circumstantial 0.9 1 0.94
Coherence 0.85 0.98 0.91
Delusions 0.91 1 0.95
Derailment 0.91 0.96 0.94
Flight of ideas 0.93 0.97 0.94
Hallucinations 0.85 0.98 0.91
Incoherence 0.82 0.99 0.9
Poverty of thought 0.92 0.96 0.94
Tangential 0.92 1 0.95
Conclusion
User friendly concept extraction
Open Source
Designed for simple concepts
○ > 90% P
○ > 80% R
CRIS team
Rob Stewart, Matthew Broadbent, Mike Denis
Chin-Kuo Chang, Richard Hayes, Alex Tulloch,
Max Henderson, Gayan Perera
Felicity Callard (Oversight Committee)
Andrea Fernandes (Administrator)
Ryan Little (data linkage)
Hitesh Shetty (data extraction)
Michael Ball (NLP specialist)
Sheffield team
Angus Roberts
Genevieve Gorrell
Ian Roberts
Adam Funk
Mark Greenwood

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Richard Jackson - Big Data in Mental Health - 23rd July 2014

  • 1.
  • 2. SLAM Clinical records ~250 000 patient records 18 million free text documents Available for research via the CRIS project
  • 3.
  • 4.
  • 5.
  • 6. Information Extraction (IE) Patient ID Diagnosis Age Address 1 Depression 31 Flat 1, XYZ road 2 Cancer 67 2 Another Lane 3 Heart Attack 58 78 A place
  • 7. 42% 58% Unique Medications per Patient 69% 31% Unique Diagnosis per Patient 11% 89% Unique MMSE Scores per Patient Structured Free text
  • 8.
  • 9.
  • 10.
  • 11.
  • 12.
  • 13. Negative symptoms of psychosis Deficits of normal emotional behaviour Social withdrawal Anhedonia (inability to experience pleasure) Poverty of speech Etc. Less treatable by medication Greater affect on quality of life
  • 14.
  • 15. Example sentences ‘Patient X has poor eye contact’ ‘I assessed the patient on 01/03/12. I noted that eye contact was poor’ ‘Saw patient X yesterday. Eye contact was bad, even worse than before’ ‘I spoke to patient X over the telephone, and was thus unable to assess eye contact’ ‘Patient X presented with the same level of eye contact as on our last meeting’
  • 16. Support Vector Machines SVM produces hyperplane to classify unseen examples
  • 17.
  • 18.
  • 19.
  • 20.
  • 21.
  • 22.
  • 23. Outputs Excel/CSV Knowtator format (for Arc) Gate XML Direct to database
  • 24. Psychosis Symptomatology app P R F1 Apathy 0.85 1 0.93 Blunted/Flat affect 1 0.74 0.84 Concrete thinking 0.97 0.6 0.74 Emotional withdrawal 0.78 0.76 0.77 Motivation 0.75 0.63 0.68 Poverty of speech 0.81 0.87 0.84 Rapport 0.85 1 0.91 Social withdrawal 0.9 1 Anhedonia 0.96 0.83 0.89 Associations 1 0.87 0.94 Circumstantial 0.9 1 0.94 Coherence 0.85 0.98 0.91 Delusions 0.91 1 0.95 Derailment 0.91 0.96 0.94 Flight of ideas 0.93 0.97 0.94 Hallucinations 0.85 0.98 0.91 Incoherence 0.82 0.99 0.9 Poverty of thought 0.92 0.96 0.94 Tangential 0.92 1 0.95
  • 25.
  • 26. Conclusion User friendly concept extraction Open Source Designed for simple concepts ○ > 90% P ○ > 80% R
  • 27. CRIS team Rob Stewart, Matthew Broadbent, Mike Denis Chin-Kuo Chang, Richard Hayes, Alex Tulloch, Max Henderson, Gayan Perera Felicity Callard (Oversight Committee) Andrea Fernandes (Administrator) Ryan Little (data linkage) Hitesh Shetty (data extraction) Michael Ball (NLP specialist)
  • 28. Sheffield team Angus Roberts Genevieve Gorrell Ian Roberts Adam Funk Mark Greenwood