Skip to main content

Table 2 Comparison between different pressure sites and body positions

From: Comparing intra-abdominal pressures in different body positions via a urinary catheter and nasogastric tube: a pilot study

  Bias (95% CI) in mmHg Precision (limits of agreement) in mmHg R 2 SE
IBP supine vs IGP supine 0.3 (-0.6 to 1.3) 3.7 (-6.8 to 7.5) 0.42 27.4
IBP HOB30 vs IGP HOB30 2.7 (1.3 to 4.1) 5.5 (-8.0 to 13.5) 0.28 11.2
IBP supine vs IGP HOB30 -0.8 (-2.2 to 0.7) 5.6 (-10.1 to 11.6) 0.25 39.2
  1. Bias, precision, limits of agreement and coefficient of variation (R2) comparing different pressure measurements. IBP, intra-bladder pressure; IGP, intra-gastric pressure; HOB30, head of bed elevated at 30°; 95% CI, confidence interval; SE, standard error (2 × SD/mean IAP)