Emergency department triage prediction of clinical outcomes using machine learning models

Table 2 The 20 most common emergency department diagnoses for critical care and hospitalization outcome

Critical care outcome			Hospitalization outcome
CCS*	Diagnostic category	n	CCS*	Diagnostic category	n
122	Pneumonia	161	102	Nonspecific chest pain	1836
102	Nonspecific chest pain	161	251	Abdominal pain	900
109	Acute cerebrovascular disease	138	122	Pneumonia	892
108	Congestive heart failure (non-hypertensive)	133	133	Other lower respiratory diseases	732
133	Other lower respiratory diseases	125	108	Congestive heart failure (non-hypertensive)	626
153	Gastrointestinal hemorrhage	101	127	Chronic obstructive pulmonary disease and bronchiectasis	570
106	Cardiac dysrhythmias	95	245	Syncope	556
131	Respiratory failure, insufficiency, and arrest	90	259	Residual codes (unclassified)	554
2	Septicemia	90	657	Mood disorders	535
259	Residual codes (unclassified)	86	197	Skin and subcutaneous tissue infections	531
55	Fluid and electrolyte disorders	82	106	Cardiac dysrhythmias	530
127	Chronic obstructive pulmonary disease and bronchiectasis	70	109	Acute cerebrovascular disease	483
100	Acute myocardial infarction	64	153	Gastrointestinal hemorrhage	466
101	Coronary atherosclerosis and other heart disease	62	159	Urinary tract infections	463
50	Diabetes mellitus with complications	57	55	Fluid and electrolyte disorders	459
233	Intracranial injury	53	659	Schizophrenia and other psychotic disorders	391
242	Poisoning by other medications and drugs	45	101	Coronary atherosclerosis and other heart disease	319
251	Abdominal pain	43	660	Alcohol-related disorders	285
245	Syncope	40	252	Malaise and fatigue	270
159	Urinary tract infections	40	246	Fever of unknown origin	258

Abbreviation: CCS Clinical Classification Software
*The principal diagnoses (> 14,000 ICD-9-CM diagnosis codes) were consolidated into 285 mutually exclusive diagnostic categories using the Agency for Healthcare Research and Quality Clinical Classifications Software (CCS) [50], as done previously [51]

ISSN: 1364-8535