Table 1.

Demographics and Diagnosis of Patients With Acute Cardiac Symptoms

Demographic Characteristics2001–2002 Control ACI-TIPI Off (n = 994)2001–2002 Intervention ACI-TIPI On (n = 867)P Value
ACI-TIPI = Acute Cardiac Ischemia Time-Insensitive Predictive Instrument; ICD-9-CM = International Classification of Diseases, 9th edition, Clinical Modification.
Sex, %.3
    Female51.153.4
    Male48.946.6
Age, mean y62.361.4.7
Race, %.4
    White81.881.5
    Black0.30.1
    Hispanic9.710.8
    Other or unable to determine9.27.6
Final diagnosis, %.1
    Acute myocardial infarction (ICD-9-CM 410)7.85.8
    Acute cardiac ischemia ( ICD-9-CM 410, 411)13.811.7
    Stable angina (ICD-9-CM 413)3.42.0
    Noncardiac or not acute ischemia82.886.3
ACI-TIPI score, mean28.024.6.5