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Table 1 Patient demographic and clinical characteristics

From: Morbidity and cost burden of methicillin-resistant Staphylococcus aureus in early onset ventilator-associated pneumonia

Characteristics MRSA (n = 59) MSSA (n = 95) Gram negative (n = 182)
Demographics
   Age (median [IQR]; years) 74 (64–81) 67* (47–78) 65 (53–76)
   Male 55.9% 52.6% 63.2%
Insurance
   Medicare 67.8% 49.5%* 50.0%
   Medicaid 3.4% 8.4% 6.0%
   Managed care 15.3% 17.9% 17.0%
Comorbidities
   Immunosuppressed 22.0% 8.4%* 12.1%
   Cancer 15.3% 9.5% 16.5%
   Diabetes mellitus 39.0% 28.4% 25.8%
   Chronic renal failure 17.0% 9.5% 13.7%
   Congestive heart failure 45.8% 22.1%* 19.8%
   Median number of comorbidities (IQR) 3 (1–5) 2* (0–4) 2 (1–3)
Acute clinical presentation on admission
   Albumin <2.4 g/dl 3.4% 4.2% 4.4%
   Arterial pH <7.3 5.1% 13.7% 8.2%
   Creatinine >1.5 mg/dl 8.5% 15.8% 6.6%
   WBC <4.3 or >19.8 × 103/mm3 6.8% 12.6% 6.6%
   Bands >32% 1.7% 2.1% 1.1%
   BUN >55 mg/dl 10.2% 5.3% 4.4%
   BUN 40–55 mg/dl 5.1% 2.1% 2.2%
   Temperature <35.6°C 11.9% 27.4%* 14.8%
   Respiration >39 breaths/min 5.1% 4.2% 0.6%
   GCSc <6 27.1% 16.8% 20.3%
   Pleural effusion 28.8% 20.0% 17.0%
   Bacteremia 10.2% 14.7% 7.1%
   ASGd ≥ 3 72.6% 72.9% 66.5%
Care unit    
Trauma unit 2.4% 13.9%* 15.1%
Major surgery 11.9% 17.9% 26.9%
  1. *P < 0.05 for MSSA versus MRSA; P < 0.05 for Gram-negative versus MRSA. ASG, Admission Severity Group; BUN, blood urea nitrogen; GCS, Glasgow Coma Scale; IQR, interquartile range; MRSA = methicillin-resistant Staphylococcus aureus; MSSA = methicillin-sensitive Staphylococcus aureus.