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Table 1 Characteristics of NICU surveillance data in 26 old/voluntary and 95 new/mandatory participants in NEO-KISS, year 2007

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

Parameter Old/voluntary participants (N = 26, starting in NEO-KISS 1January 2000- December 2002) New/mandatory participants (N = 95, starting in NEO-KISS January-December 2006) p-valuea
NICU characteristics    
Number of beds in the NICU, median 24 16 0.004
Number of VLBW infants year 2007, median 53 23 <0.001
Months of participation until December 2010, median 123 56 <0.001
Number VLBW infants 1527 2753  
Birth weight (gram), mean 1100 1140 0.001
End of surveillance    
Transfer before 1800 g 21.4% 13.10%  
End of surveillance 1800 g 71.9% 80.0%  
Died 6.7% 7.0%  
Number VLBW infants according to birth weight groups (%)
< 500 g 52 (3.4%) 92 (3.3%)  
1000-1499 g 615 (40.3%) 1012 (36.8%)  
1000-1499 g 860 (56.3%) 1649 (59.9%)  
Device utilization rates per 100 patient days (pooled mean)#
CVC    
500-999 g 28.2 30.2 0.484
1000-1499 g 13.8 16.9 0.934
Tube    
500-999 g 21.2 21.2 0.267
1000-1499 g 6.3 6.1 0.676
Healthcare associated infection rates per 1000 patient days (pooled mean)#
Primary BSI    
500-999 g 6.5 5.2 0.023
1000-1499 g 3.1 3.2 0.964
Pneumonia    
500-999 g 1.0 0.8 0.286
1000-1499 g 0.4 0.1 0.053
Device-associated infection rates per 1000 device days (pooled mean)#
CVC-BSI    
500-999 g 11.4 9.4 0.011
1000-1499 g 7.7 6.9 0.150
Tube associated pneumonia    
500-999 g 2.2 2.3 0.634
1000-1499 g 3.9 0.4 0.010
  1. NICU, neonatal intensive care unit; BSI, bloodstream infection; CVC-BSI, Central venous catheter-associated bloodstream infection; VLBW, very low birth weight; # Data for the birth weight group < 500 g are not shown because of the small number of VLBW infants in this group; a p-value, Wilcoxon test; b p-value, Chi square test.