Factors associated with delayed treatment onset for acute myocardial infarction in Victorian emergency departments: A regression tree analysis

2013 ◽  
Vol 16 (4) ◽  
pp. 160-169 ◽  
Author(s):  
Lisa Kuhn ◽  
Linda Worrall-Carter ◽  
John Ward ◽  
Karen Page
Keyword(s):  
Myocardial Infarction ◽  
Acute Myocardial Infarction ◽  
Emergency Departments ◽  
Regression Tree ◽  
Tree Analysis ◽  
Delayed Treatment ◽  
Factors Associated ◽  
Regression Tree Analysis ◽  
Treatment Onset

scholarly journals Classification and Regression Trees on Aggregate Data Modeling: An Application in Acute Myocardial Infarction

2011 ◽  
Vol 2011 ◽  
pp. 1-19 ◽  
Author(s):  
C. Quantin ◽  
L. Billard ◽  
M. Touati ◽  
N. Andreu ◽  
Y. Cottin ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Acute Myocardial Infarction ◽  
Regression Tree ◽  
Predictor Variable ◽  
Symbolic Regression ◽  
Tree Analysis ◽  
Cart Analysis ◽  
Regression Tree Analysis ◽  
Timi Score ◽  
One Year

Cardiologists are interested in determining whether the type of hospital pathway followed by a patient is predictive of survival. The study objective was to determine whether accounting for hospital pathways in the selection of prognostic factors of one-year survival after acute myocardial infarction (AMI) provided a more informative analysis than that obtained by the use of a standard regression tree analysis (CART method). Information on AMI was collected for 1095 hospitalized patients over an 18-month period. The construction of pathways followed by patients produced symbolic-valued observations requiring a symbolic regression tree analysis. This analysis was compared with the standard CART analysis using patients as statistical units described by standard data selected TIMI score as the primary predictor variable. For the 1011 (84, resp.) patients with a lower (higher) TIMI score, the pathway variable did not appear as a diagnostic variable until the third (second) stage of the tree construction. For an ecological analysis, again TIMI score was the first predictor variable. However, in a symbolic regression tree analysis using hospital pathways as statistical units, the type of pathway followed was the key predictor variable, showing in particular that pathways involving early admission to cardiology units produced high one-year survival rates.

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