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Table 2 Risk and rate of urinary tract infections during the four study periods

From: Intra-abdominal pressure measurement using the FoleyManometer does not increase the risk for urinary tract infection in critically ill patients

  Period 1 Period 2 Period 3 Period 4 Total
  Control group Modified Cheatham technique FoleyManometer FoleyManometerLV  
  2000-2001 2002-2003 2004-2005 2006-2007  
UC 915 1,062 1,568 1,896 5,441
UC/patient 0.4 0.7 1.2 1.7 0.9
POS UC 114 119 204 171 608
POS UC/UC sample, % 12.5 11.2 13 9* 11.2
UTI 102 106 133 140 481
UTI risk (CR), % 5.0 7.2 10.5 12.7° 8.2
UTI risk (ADJ), % 11.1 10.0 8.5 7.4 8.8
UTI/1,000 CD (CR) 12.7 14.6 17.5§ 19.6# 16.1
UTI/1,000 CD (ADJ) 12.7 11.7 13.6 13.3 12.8
  1. ADJ, adjusted; CD, catheter days; CR, crude rate; POS, positive (bacteriuria); UC, urine culture; UTI, urinary tract infection = positive UC with more than five leucocytes per high power field or more than 25 leucocytes per microliter; UTI risk (CR), the number of UTI divided by the total number of patients; UTI risk (ADJ), the number of UTI divided by the number of UC taken; UTI/1,000 CD (CR), the number of UTI/period/1,000 CD; UTI/1,000 CD (ADJ), the crude UTI rate multiplied by the ratio of control (group 1) versus study (groups 2-4) patients SAPS-II probability of mortality. *p value 0.007, 0.06, and < 0.001 when period 4 was compared to period 1 (control), period 2 and period 3, respectively, regarding number of positive UC with regard to total number of UC; °p value 0.039 and 0.035 when period 4 was compared to period 1 and 2, respectively; # p value < 0.001 and 0.011 when period 4 was compared to period 1 and 2, respectively; § p value 0.007 when period 3 was compared to period 1.