Figure 8.

Automated hemoglobin measurement accuracy of our cell-phone based blood analyzer. (A) Comparison of cell-phone based hemoglobin measurement results with the standard test results obtained by using Sysmex KN21 for 37 different blood samples. A linear regression of the experimental data (n = 37; red line) with hemoglobin concentrations ranging from ~ 11 g/dL to 17 g/μL demonstrates a good agreement between the two modalities with a correlation coefficient of ~ 0.92. The cell-phone blood analyzer provides an absolute measurement error of less than 5%. (B) The Bland-Altman analysis results, evaluating the accuracy of the cell-phone blood analyzer for hemoglobin concentration measurements vs. the standard hematology analyzer. The black solid lines show a bias of 0.036 g/dL and the 95% limits of agreement: ~ 0.63 g/dL (upper limit) and −0.54g/dL (lower limit).