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Table 1 Data from 224 hospitals participating in MRSA-KISS from 2004 to 2009

From: Individual units rather than entire hospital as the basis for improvement: the example of two Methicillin resistant Staphylococcus aureus cohort studies

Year Hospitals MRSA cases Patient days MRSA incidence density/per 1000 patient days IRR  
  Total Imported (%) Hospital acquired   Total Im-ported Hospital acquired Hospital acquired CI95
2004 63 5651 3327 (59) 2324 9421634 0,60 0,35 0,25 1 = reference  
2005 88 9124 5885 (65) 3239 12808024 0,71 0,46 0,25 1.03 0.97-1.08
2006 115 13810 9631 (70) 4179 15957877 0,87 0,60 0,26 1.06 1.01-1.12
2007 148 19147 13991 (73) 5156 19594818 0,98 0,71 0,26 1.07 1.02-1.12
2008 178 24190 18493 (76) 5697 23864511 1,01 0,77 0,24 0.97 0.92-1.02
2009 204 28628 22822 (80) 5806 25416849 1,13 0,90 0,23 0.93 0.88-0.97
Total 224 100550 74149 (74) 26401 107063713 0,94 0,69 0,25