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Table 1 Characteristics of Study Population (N = 6687)

From: Rehospitalization following percutaneous coronary intervention for commercially insured patients with acute coronary syndrome: a retrospective analysis

  n (%)
Age   
<65 5587 (83.6)
65–74 803 (12.0)
>74 297 (4.4)
Mean ± SD 56.5 ± 9.4
Gender   
Male 5174 (77.4)
Female 1513 (22.6)
Regions   
Midwest 2265 (33.9)
Northeast 597 (8.9)
South 2939 (44.0)
West 886 (13.2)
Index ACS Diagnoses*   
STEMI 3276 (49.0)
NSTEMI and UA 3411 (51.0)
Type of Stent at Index   
Drug-eluting stent 5534 (82.8)
Bare-metal stent 787 (11.8)
No stent 62 (0.9)
Unknown 304 (4.5)
Medical History in 12-month Baseline*  
Prior PCI 487 (7.3)
Prior CABG 51 (0.8)
Clopidogrel Use 998 (14.9)
Hypertension 4821 (72.1)
Hyperlipidemia 5176 (77.4)
Diabetes 1777 (26.6)
  1. Note: Percentages may not add to 100 due to rounding.
  2. Abbreviations: ACS = acute coronary syndrome; CABG = coronary artery bypass graft; NSTEMI = non-ST-segment elevation myocardial infarction; PCI = percutaneous coronary intervention; SD = standard deviation; STEMI = ST-segment elevation myocardial infarction; UA = unstable angina.
  3. *ICD-9-CM Codes: Diabetes = 250.xx; Hyperlipidemia = 272.xx; Hypertension = 401.xx-4-5.xx; STEMI = 410.xx; NSTEMI = 410.7; UA = 411.1.
  4. Type of Stent determined by Diagnosis Related Group code: Drug-eluting stent = 557, 558; Bare-metal stent = 555,556; No stent = 518.