Table 1

 Diagnoses (%) at first and return visits to the ED

Diagnosis/reasonsIDC-9-CM*All patients first visit(n = 500)Unscheduled returns second visit(n = 250)
*International Classification of Diseases, 9th Revision, Clinical Modification.
Abdominal pain78977
Renal colic788.0710
Gastroenteritis009.144
Respiratory failure518.8456
Precordial pain786.5141
Upper respiratory infection46541
Anxiety attack300.0034
Urinary tract infection599.032
Upper limb contusion92332
Conjunctivitis372.003<1
Lumbalgia/low back pain724.222
Epistaxis784.723
Arm/leg pain729.522
Allergic urticaria708.02<1
Asthma attack493.9122
Sprained ankle845.01<1
Arterial hypertension401.91<1
Biliary colic574.2011
Cranial trauma854.0212
Lower limb contusion92412
Cardiac failure42813
Stroke4361<1
Orthostatic hypotension458.01<1
Cervicalgia723.111
Radius fracture813.8111
Hand wound8821<1
Appendicitis540<12
Alcohol abstinence syndrome303.9<12
Psychotic disorder298.9<11
Acute myocardial infarction410<11
Pneumonia486<11
Hypoglycemia251.2<11