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Table 2 Data from 111 hospitals with continuous participation in MRSA-KISS for at least four years

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

Year of partici-pation Hospitals MRSA cases Patient days MRSA incidence density/per 1000 patient days IRR Hospital acquired CI95
  Total Imported (%) Hospital acquired   Total Im-ported Hospital acquired  
1. 111 10615 6949 (65) 3666 14830273 0,72 0,47 0,25 1 = reference -
2. 111 13057 9140 (70) 3917 15220824 0,86 0,60 0,26 1.04 1.00-1.09
3. 111 14723 10840 (74) 3883 15044052 0,98 0,72 0,26 1.04 1.00-1.09
4. 111 16321 12368 (76) 3953 15441101 1,06 0,80 0,26 1.04 0.99-1.08
Total 111 54716 39297 (72) 15419 60536250 0,90 0,65 0,25 - -