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Annals of Intensive Care

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)
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