Table 2 Evaluation of SpHb accuracy among the study groups.

From: Effect of hyperbilirubinemia on the accuracy of continuous non-invasive hemoglobin measurements in liver transplantation recipients

Measures

Normal (n = 127)

Mild-to-moderate (n = 87)

Severe (n = 82)

P-value

Bias (g/dL)

0.20 (− 2.59 to 3.00)

0.98 (− 1.38 to 3.35)

1.23 (− 1.16 to 3.63)

< 0.001

Concordance rate

92%

97%

95%

 

Major error rate*

27%

52%

61%

< 0.001

Possible missed transfusion (SpHb > 7.0, Hb < 7.0 g/dL)

2%

8%

12%

< 0.001

Possible over-transfusion (SpHb < 7.0, Hb > 7.0 g/dL)

0.0%

0.2%

0.9%

NA†

  1. The preoperative serum total bilirubin levels are classified into normal (< 1.2 mg/dL), mild-to-moderate hyperbilirubinemia (1.2–3.0 mg/dL), and severe hyperbilirubinemia (> 3.0 mg/dL ). Values are reported as the mean (95% limit of agreement), number, or proportion (percentage).
  2. *Proportion of major errors that fall into the grey or red zone in the error grid analysis.
  3. †Not available because n > 500, but the number of each cell < 5.
  4. SpHb non-invasive hemoglobin concentration, Hb hemoglobin.
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