Skip to main content

Table 2 Standardized Differences Between BMS and DES Patients Before and After Matching, April 1, 2003 - December 31, 2007

From: Accounting for the mortality benefit of drug-eluting stents in percutaneous coronary intervention: a comparison of methods in a retrospective cohort study

  Standardized Difference Prior to Match Standardized Difference Post Match
N (2,518 BMS, 19,101 DES) (2,063 BMS, 2,063 DES)
Age (years) -8.3 1.9
Male Sex (%) -1.7 -6.2
Race/Ethnicity -11.3 -5.8
Comorbidities (%)   
   Diabetes 9.1 3.5
   Hypertension 7.5 -3.2
   Prior MI 2.7 4.7
   PCI Indication: -21.6 0.2
   Prior PCI 6.1 6.1
   Prior CABG 2.5 2.5
   Congestive Heart Failure 3.8 3.8
   Prior Stroke 0.0 0.0
   Peripheral Arterial Disease 1.9 1.9
   Glomerular Filtration Rate 0.3 0.3
   Systemic Malignancy -13.4 0.4
   Prior Gastrointestinal Bleeding -4.2 -0.6
   Chronic Lung Disease -0.3 7.8
Medications   
   β-Blockers 11.9 -1.1
   Clopidogrel 8.9 3.4
   Statin 12.3 5.3
   ACE-I/ARB 9.2 4.1
   Warfarin 1.0 3.1
  1. Abbreviations: MI, myocardial infarction; PCI, percutaneous coronary intervention; CABG, coronary artery bypass graft surgery.