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Table 1 Characteristics of the patients (n = 100)

From: Effects of zero reference position on bladder pressure measurements: an observational study

  Total (n= 100) IAH (n= 9) Non-IAH (n= 91) p value
Female gender 52 (52.0%) 8 (88.9%) 44 (48.4%) 0.032a
Age (years) 53.5 ± 16.1 38.1 ± 2.5 55.0 ± 16.0 0.001b
BMI (kg/m2) 27.2 ± 10.0 40.4 ± 8.7 25.9 ± 9.2 < 0.0001b
Emergency surgery 55 (55.0%) 0 (0%) 55 (60.4%) < 0.0001a
Bariatric surgery 24 (24.0%) 9 (100%) 15 (16.5%) < 0.0001a
APACHE II 11.2 ± 1.7 12.1 ± 2 10.3 ± 1.5 0.183b
SOFA 4.5 ± 2.8 5.1 ± 3.6 4.0 ± 2.0 0.006b
ICU mortality 15 (15%) 0 (0.0%) 15 (16.5%) 0.348a
IAPMAL (mmHg) 8.5 ± 2.8 12.9 ± 0.6 8.1 ± 2.5 < 0.0001b
  1. aFisher's exact test; bMann-Whitney U test. APACHE, Acute Physiology And Chronic Health Evaluation II; BMI, body mass index; IAH, intra-abdominal hypertension; IAPMAL, intra-abdominal pressure at midaxillary line; SOFA, Sequential organ failure assessment.