Demographic and clinical characteristics of patients with methicillin-resistant Staphylococcus aureus infections at UCMC in 2004-5 and 2008.

aThe p-value was determined using the χ-square or the Fisher exact test, as appropriate; for mutually exclusive categorical variables a single test was performed to compare the distribution of the data for 2004-5 with the data for 2008.bIncludes cholecystitis, conjunctivitis, peritonitis and upper respiratory infection.cDenominators for HA-MRSA risk factors in 2004-5 exclude those interviewed patients who answered that that they did not know information requested of them and those patients about whom risk factor information could not be determined from chart review. Information regarding a stay in a long-term care facility for 2004-5 patients was determined only for those patients lacking another health-care risk factor for HA-MRSA infection. For 2008 patients, this was evaluated for all 135 enrolled.