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The dashed red lines show the upper and lower limits of agreements.
Using the results from these linear regression analyses, the 95% limits of agreements between the two methods were then calculated [19].
The correlation between the two methods was 0.79 (95% CI 0.66 to 0.88, p < 0.001) + the mean bias was 5% with limits of agreements of 1 to 12%.
The bias and limits of agreements for hemoglobin concentrations in the Cardiac Surgery OR, 10- and 37-bed ICUs were: −3 [−5; 1], −5 [−28; 17], and −19 [−64; 27] g/L, respectively (Fig. 1a, b).
According to Bland and Altman analysis, the calculated bias was 2.01; precision at 1.49; two SD of 2, 98; limits of agreements -0.91 to 4.93; and error of 35.1%.
The comparison between OI and OSI showed that 97.4% of the results were between the limits of agreements (− 17.2 + 10.6), a bias of − 3.3 and a correlation R2 = 0.643.
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b Limits of agreement.
95% limits of agreement.
Lines represent limits of agreement.
Limits of agreement were ±2.92 g/dl.
Intrarater limits of agreement were −1.66 to 2.26; interrater limits of agreement were −2.35 to 3.85.
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CEO of Professional Science Editing for Scientists @ prosciediting.com