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. 2022 Nov 4;9(36):2204077. doi: 10.1002/advs.202204077

Figure 4.

Figure 4

Prediction errors of 3‐ and 4‐feature MLR on the second, independent data set (n = 2637). A) Violin plot of prediction errors generated by MLR with 3 (Equation (4)) and 4 features (Equation (5)), respectively. White circle indicates median, orange bar indicates interquartile range (IQR); orange lines stretched from the bar indicate first quartile −1.5 IQR and third quartile +1.5 IQR. B) Histogram of Hb prediction error (MLR with 4 features). C) Histogram of iron prediction error (MLR with 4 features). D) Histogram of relative absolute prediction error to unit Hb in percent for each pRBC unit (MLR with 4 features). E) Histogram of relative absolute prediction error to unit iron in percent for each pRBC unit (MLR with 4 features). Blue lines indicate the limits of the 68.3% confidence interval (mean+/− SD). Green lines indicate the limits of the 95% confidence interval (mean+/− 2*SD). Red lines indicate the limits of the 99.7% confidence interval (mean+/− 3*SD).