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Table 2 Agreement analysis between bladder pressure and bladder 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
100 13.7 4.2 2.9 -1.4 (-4.5 to +1.6) 9.9 (6.9 to 13.0) ± 41%
150 21.1 11.2 9.8 -8.0 (-18.7 to +2.8) 30.4 (19.6 to 41.2) ± 91%
200 27.1 17.6 14.7 -11.1 (-26.4 to +4.3) 46.4 (31.0 to 61.7) ± 106%
  1. Shown is an agreement analysis between bladder pressure measured with 50 ml saline (as reference) and that bladder pressure measured with 100, 150 and 200 ml saline. The bias, precision, limits of agreement and percentage error were computed considering intra-bladder pressure (IBP) at 50 ml versus IBP at 100, 150 and 200 ml.