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Table 6 Clinical impact of measurement errors of raw SpHb

From: Meta-analytic estimation of measurement variability and assessment of its impact on decision-making: the case of perioperative haemoglobin concentration monitoring

Index Threshold Mean SD 2.5 % 25 % 50 % 75 % 97.5 %
Se 6 0.688 0.168 0.337 0.578 0.710 0.818 0.955
Se 7 0.770 0.134 0.474 0.686 0.791 0.873 0.969
Se 8 0.823 0.106 0.580 0.758 0.842 0.905 0.977
Se 9 0.858 0.086 0.659 0.805 0.873 0.924 0.981
Se 10 0.881 0.072 0.715 0.838 0.894 0.936 0.985
Sp 6 0.919 0.058 0.775 0.889 0.932 0.963 0.992
Sp 7 0.903 0.070 0.731 0.868 0.919 0.956 0.991
Sp 8 0.880 0.087 0.666 0.835 0.899 0.945 0.988
Sp 9 0.842 0.111 0.567 0.783 0.866 0.927 0.985
Sp 10 0.782 0.145 0.433 0.699 0.809 0.893 0.977
PPV 6 0.771 0.096 0.574 0.705 0.776 0.842 0.940
PPV 7 0.845 0.078 0.678 0.795 0.854 0.904 0.971
PPV 8 0.884 0.064 0.743 0.843 0.892 0.933 0.982
PPV 9 0.908 0.053 0.790 0.875 0.916 0.948 0.987
PPV 10 0.928 0.040 0.839 0.902 0.933 0.959 0.990
NPV 6 0.903 0.044 0.817 0.872 0.905 0.936 0.981
NPV 7 0.875 0.059 0.756 0.834 0.880 0.919 0.977
NPV 8 0.844 0.071 0.698 0.793 0.850 0.898 0.969
NPV 9 0.798 0.085 0.630 0.737 0.803 0.860 0.953
NPV 10 0.716 0.101 0.527 0.642 0.716 0.786 0.914
Acc 6 0.862 0.027 0.802 0.847 0.864 0.879 0.906
Acc 7 0.853 0.032 0.778 0.836 0.857 0.875 0.904
Acc 8 0.851 0.034 0.770 0.833 0.856 0.875 0.904
Acc 9 0.852 0.034 0.771 0.834 0.857 0.875 0.904
Acc 10 0.857 0.033 0.774 0.840 0.862 0.878 0.905
Err 6 0.138 0.027 0.094 0.121 0.136 0.153 0.198
Err 7 0.147 0.032 0.096 0.125 0.143 0.164 0.222
Err 8 0.149 0.034 0.096 0.125 0.144 0.167 0.230
Err 9 0.148 0.034 0.096 0.125 0.143 0.166 0.229
Err 10 0.143 0.033 0.095 0.122 0.138 0.160 0.226
  1. Threshold in g/dL; Se: sensitivity, Sp: specificity, PPV: positive predictive value, NPV: negative predictive value, Acc: accuracy, Err: probability of decisional error