Table 1 Lin’s Concordance & Pearson Correlation Coefficients between the two methods: IAP & IBP for all measures (IAP = 0–22 mmHg) Versus High IAP (IAP > 12 mmHg)
Variable Y | Intra Abdominal Pressure (IAP = 0–22 mmHg) | Intra Abdominal Pressure (IAP > 12 mmHg) |
Variable X | Intra Bladder Pressure (IBP with IAP = 0–22 mmHg) | Intra Bladder Pressure (IBP with IAP > 12 mmHg) |
Sample size | 388 | 81 |
Mean | IAP: 8.254 IBP: 8.351 | IAP: 16.173 IBP: 16.455 |
Variance | IAP: 27.037 IBP: 29.318 | IAP: 09.150 IBP: 15.764 |
Concordance correlation coefficient | 0.965 | 0.903 |
95% Confidence interval | 0.958 to 0.971 | 0.866 to 0.931 |
Pearson ρ (precision) | 0.966 | 0.940 |
Significance level | P < 0.0001 | P < 0.0001 |
Bias correction factor Cb (accuracy) | 0.999 | 0.961 |