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. 2016 Jan 19;39(1):9–18. doi: 10.1002/clc.22491

Table 3.

Predictors of Avoiding Invasive Strategy in STEMI Patients Transferred to Different Facility After Receiving Fibrinolytic Therapy

Variable OR 95% CI P Value
Cardiogenic shock 1.66 1.21‐2.27 0.002
Cardiac arrest 3.42 2.16‐5.42 <0.001
ICH 13.96 8.28‐23.54 <0.001
Age (per 10‐unit change) 1.97 1.77‐2.20 <0.001
Sex
M Ref
F 1.07 0.86‐1.33 0.571
Deyo modification of CCI scorea
0–1 Ref
2 1.46 1.14‐1.88 0.003
≥3 2.03 1.56‐2.63 <0.001
Hospital bed size
Small Ref
Medium 0.85 0.26‐2.78 0.783
Large 0.89 0.31‐2.52 0.820
Hospital teaching status
Nonteaching Ref
Teaching 0.81 0.43‐1.53 0.513
Hospital region
Northeast Ref
Midwest 0.82 0.29‐2.28 0.697
South 0.93 0.37‐2.37 0.882
West 0.70 0.25‐1.93 0.488
Median HHI category for patient Zip code, %b
0–25 Ref
26–50 1.11 0.85‐1.45 0.444
51–75 0.77 0.53‐1.12 0.174
76–100 0.70 0.44‐1.12 0.136
Primary payer
Medicare/Medicaid Ref
Private insurance (including HMOs) 0.93 0.70‐1.24 0.628
Other/self‐pay/no charge 1.13 0.76‐1.67 0.551

Abbreviations: CCI, Charlson Comorbidity Index; CI, confidence interval; F, female; HHI, household income; HMO, health maintenance organization; ICD‐9‐CM, International Classification of Diseases, Ninth Revision, Clinical Modification; ICH, intracranial hemorrhage; M, male; OR, odds ratio; Ref, referent; STEMI, ST‐segment elevation myocardial infarction.

a

Charlson/Deyo Comorbidity Index was calculated as per Deyo classification. Comorbidities were identified by ICD‐9‐CM code mentioned in any of the diagnostic fields.

b

This represents a quartile classification of the estimated median HHI of residents in the patient's Zip code. These values are derived from Zip code demographic data obtained from Claritas. The quartiles are identified by values of 1 to 4, indicating the poorest to wealthiest populations. Because these estimates are updated annually, the value ranges vary by year (http://www.hcup‐us.ahrq.gov/db/vars/zipinc_qrtl/nisnote.jsp).