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Table 2 Development of primary BSI rates during the first three years of participation in 26 old/voluntary and 95 new/mandatory participants in NEO-KISS

From: The step from a voluntary to a mandatory national nosocomial infection surveillance system: the influence on infection rates and surveillance effect

  Old/voluntary participants (N = 26, starting in NEO-KISS January 2000- December 2002) New/mandatory participants (N = 95, starting in NEO-KISS January-December 2006)
  1st year 2nd year 3rd year Total 1st year 2nd year 3rd year Total
Number of VLBW infants 1421 1310 1207 3938 2855 2740 2676 8271
Pooled mean birth weight (g) 1070 1125 1085 1095 1145 1140 1146 1140
Number of patient days 59314 52112 48651 160077 103198 100382 98416 301996
Mean observation days per patient 41.7 39.8 40.3 40.6 36.1 36.6 36.8 36.5
CVC utilization rates (%) 21.2 22.1 22.6 21.9 24.9 24.2 22.7 24.0
Number of BSI 456 347 294 1097 509 439 384 1332
BSI Incidence density (per 1000 patient days) 7.7 6.7 6.0 6.9 4.9 4.4 3.9 4.4
  1. NICU, neonatal intensive care unit; BSI, bloodstream infection; VLBW, very low birth weight.