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Table 4 Data from 159 ICUs with continuous participation in ICU-KISS over 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 ICUs MRSA cases Patient days MRSA incidence density/per 1000 patient days IRR ICU-acquired CI95
  Total Imported to ICU (%) ICU- acquired   Total Im-ported to ICU ICU- acquired  
1. 159 2033 1358 (67) 675 538363 3.78 2.52 1.25 1 = reference -
2. 159 2166 1595 (74) 571 543310 3.99 2.94 1.05 0.84 0.75-0.94
3. 159 2232 1697 (76) 535 537358 4.15 3.16 1.00 0.79 0.71-0.89
4. 159 2097 1635 (78) 462 520039 4.03 3.14 0.89 0.71 0.63-0.80
Total 159 8528 6285 (74) 2243 2139070 3.99 2.94 1.05   -