Association of methicillin-resistant S. aureus (MRSA) colonization with demographic and clinical characteristics of patients visiting emergency department.

aFisher's exact test instead of Pearson's chi-square test was performed when any expected count was less than 5 by statistical analysis.bLow social economic status was defines as patients other than those with education level above senior high and a monthly income more than 50,000 NT.cIncluding wound or surgical site culture, blood culture, sputum culture, and urine culture.dIncluding Foley, port A, percutaneous drainage tubes, and catheter for dialysis.eThe chief complaints were classified according to the systems of the body affected.