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Table 4 Covariate balance of independent variables for the propensity scores between unmatched and matched data sets

From: Effects of inappropriate empirical antibiotic therapy on mortality in patients with healthcare-associated methicillin-resistant Staphylococcus aureus bacteremia: a propensity-matched analysis

  Absolute standardized difference (%)
  Unmatched data Matched data
Nosocomial infection 20.49 0.00
Trauma 12.60 10.78
Surgical operation 23.56 0.00
Immunosuppressive agents 15.43 10.73
Prior exposure to third-generation cephalosporins 11.91 3.41
Prior exposure to fluoroquinolones 12.36 10.94
Prior exposure to glycopeptides 14.06 18.14
CR-BSI 33.30 0.00
Pneumonia 18.07 5.60
Urinary tract infection 19.90 18.11
Severe sepsis or septic shock 15.05 15.58
Retention of foreign body 29.78 0.00
Infective endocarditis 15.25 18.11
Charlson’s comorbidity index 21.35 16.12
Pitt’s bacteremia score 13.35 11.08
Age 10.47 13.89
Vancomycin MICs 15.67 17.59
  1. CR-BSI catheter-related bloodstream infection, MIC minimum inhibitory concentration