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Table 1 Provisional diagnosis and triage text-based syndromes used for statistical reporting and for training the automatic triage text classification system, with correlation between daily counts from the two categorisation methods and the sensitivity of the automatic text classifier in assigning a category that matched the provisional diagnosis category.*

From: An automated, broad-based, near real-time public health surveillance system using presentations to hospital Emergency Departments in New South Wales, Australia

Syndrome ICD-9-CM codes used for the diagnosis-based syndromes and text classifier training Correlation between daily counts of text and diagnosis-based categories Sensitivity of the text- based category for matching the provisional diagnosis category
Selected symptoms
Abdominal pain 789.0 0.63 0.94
Chest pain 786.5 0.72 0.92
Convulsions (not clearly epilepsy) 779.0, 780.3 not classified not classified
Fever (cause unspecified) 780.6 0.54 0.62
Collapse/syncope/coma /delirium/ dizziness 078.81, 780.0, 780.2, 780.4, 992.1 0.64 0.77
Neuromuscular/vision problems 360.8, 368–369, 781–781.99, 782.0 0.57 0.68
Gastrointestinal syndromes
Selected gastrointestinal 001–009, 078.82, 536.2, 558, 564.5, 578.0, 787.0, 787.91 not classified not classified
Diarrhoea and intestinal infections 001–009, 558, 564.5, 787.91 0.52 0.74
Vomiting 078.82, 536.2, 578.0, 787.0 0.48 0.77
Cardiovascular syndromes
All cardiovascular 390–459, V12.5 not classified not classified
Cardiac arrest 427.5 not classified not classified
Cardiac dysrhythmias 427 (excluding 427.5) not classified not classified
Respiratory syndromes
All respiratory 033, 460–519, 768–770 0.77 0.74
Asthma 493 0.75 0.81
Influenza 487 0.09 0.22
Pneumonia 480–486 0.38 0.83
Pertussis 033 0.23 0.31
Other/unspecified respiratory infections 460–466 (excluding 466.1), 519.8 0.75 0.79
Respiratory failure/distress 518.5, 518.81–518.82, 519.9, 769 -0.01 0.25
Injury syndromes
All injury and poisoning 800–964.9, 965.09–968.4, 968.6–969.5, 969.8–979, 981–989.4, 989.6–989.9, 990–999 (excluding 992.1) 0.91 0.94
Head injury 800–804, 850–854 0.58 0.59
Burns 940–949 0.78 0.81
Bite or sting (insect/spider/snake) (910–919).4, (910–919).5, 989.5, E906.2 0.45 0.74
Open wounds 870–897 0.89 0.75
Poisoning (not illicit drug or alcohol) 960–964.9, 965.09–968.4, 968.6–969.5, 969.8–979, 981–989.4, 989.6–989.9 not classified not classified
Other syndromes
Illicit drug-related (including amphetamines) 292, 304, 305.2–305.9, 965.00–965.02, 968.5, 969.6, 969.7 0.44 0.62
Alcohol-related provisional diagnosis 291, 303, 305.0, 790.3, 980, V70.4 0.78 0.87
Meningococcal infection 036, 320.5 not classified not classified
Other or unspecified meningitis 047, 320–320.4, 320.6–322 not classified not classified
Skin problems 035, 050–057, 373, 680–709, 782, 782.1–782.9 0.71 0.85
  1. *Based on all available ED data collected between 1st September 2003 and 29th February 2005. 'Not classified' means that the syndrome categories were not included in the initial implementation of the automated syndrome classification procedure.