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Table 3 Agreement analysis between bladder and gastric pressure

From: The effect of different volumes and temperatures of saline on the bladder pressure measurement in critically ill patients

Volumes of saline (ml) Mean (mmHg) Bias (mmHg) Precision (mmHg) Lower limits of agreement (mmHg) Upper limits of agreement (mmHg) Percentage error
50 9.5 1.2 4.3 -7.2 (-11.7 to -2.7) 9.6 (5.1 to 14.1) ± 89%
100 13.7 -2.9 6.3 -15.3 (-21.9 to -8.7) 9.5 (2.8 to 16.1) ± 90%
150 21.1 -9.9 13.0 -35.4 (-49.8 to -21.1) 15.6 (1.3 to 30.0) ± 121%
200 27.1 -16.2 17.9 -51.2 (-69.9 to -32.5) 18.8 (0.1 to 37.5) ± 129%
  1. Shown is an agreement analysis between bladder pressure (measured at different volumes of saline) and gastric pressure. The bias, precision, limits of agreement and percentage error were computed considering intra-bladder pressure versus intra-gastric pressure at each volume of saline infused.