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Table 2 Characteristics of IAH and non-IAH critically ill patients

From: Effect of mechanical ventilation on intra-abdominal pressure in critically ill patients without other risk factors for abdominal hypertension: an observational multicenter epidemiological study

  Total (n= 50 IAH (n= 6) Non-IAH (n= 44) p value
Female (n) 24 (48.0) 1 (16.7) 23 (52.3) 0.192a
Age (years) 45.9 ± 15.5 51.7 ± 7.6 45.1 ± 16.1 0.289b
BMI (kg/m2) 24.2 ± 3.5 26.5 ± 4.4 23.9 ± 3.2 0.199b
APACHE II 9.2 ± 5.4 9.7 ± 4.9 9.2 ± 5.5 0.753b
IAP 6.7 ± 4.1 14.9 ± 3.2 5.6 ± 2.8 <0.000 b
APP 85.3 ± 21.7 70.3 ± 23.1 87.3 ± 21.0 0.078b
MV 50 (100) 6 44  
Medical 26 (52.0%) 3 (50.0%) 23 (52.3%) 1.000a
Surgical 24 (48.0%) 3 (50.0%) 21 (47.7%)  
   Elective 18 (36.0%) 3 (50.0%) 15 (34.1%) c
   Emergency 2 (4.0%) 0 (0.0%) 2 (4.5%  
   Trauma 5 (10.0%) 0 (0.0%) 5 (11.4%)  
ICU stay 6.5 ± 6.5 5.8 ± 5.2 6.6 ± 6.7 0.940b
ICU mortality 32 (64.0%) 4 (66.7%) 28 (63.6%) 1.000a
  1. aFisher's exact test; bMann-Whitney U test; c p value was not calculated as the expected frequency was <5 in more than 25% of the cells. IAH, intra-abdominal hypertension; BMI, body mass index; APACHE, Acute Physiology and Chronic Health Evaluation; IAP, intra-abdominal pressure; APP, abdominal perfusion pressure; MV, mechanical ventilation; ICU, intensive care unit.