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

Table 7 Clinical impact of measurement errors of calibrated SpHb

Index	Threshold	Mean	SD	2.5 %	25 %	50 %	75 %	97.5 %
Se	6	0.801	0.177	0.330	0.712	0.845	0.938	1.000
Se	7	0.858	0.135	0.503	0.795	0.894	0.958	1.000
Se	8	0.892	0.105	0.622	0.845	0.920	0.969	1.000
Se	9	0.913	0.085	0.696	0.876	0.936	0.975	1.000
Se	10	0.928	0.071	0.746	0.896	0.947	0.979	1.000
Sp	6	0.895	0.089	0.666	0.854	0.914	0.958	0.999
Sp	7	0.874	0.106	0.600	0.824	0.897	0.950	0.998
Sp	8	0.843	0.129	0.504	0.781	0.872	0.937	0.998
Sp	9	0.795	0.164	0.369	0.713	0.831	0.916	0.997
Sp	10	0.717	0.208	0.192	0.599	0.754	0.876	0.996
PPV	6	0.760	0.128	0.495	0.672	0.764	0.853	0.989
PPV	7	0.828	0.104	0.598	0.760	0.837	0.907	0.995
PPV	8	0.866	0.086	0.667	0.812	0.876	0.931	0.997
PPV	9	0.892	0.071	0.724	0.847	0.900	0.946	0.998
PPV	10	0.914	0.055	0.788	0.878	0.920	0.956	0.998
NPV	6	0.937	0.049	0.817	0.906	0.946	0.977	1.000
NPV	7	0.921	0.063	0.769	0.884	0.934	0.971	1.000
NPV	8	0.901	0.077	0.721	0.855	0.916	0.963	1.000
NPV	9	0.871	0.094	0.656	0.812	0.886	0.947	0.999
NPV	10	0.812	0.121	0.554	0.731	0.822	0.909	0.998
Acc	6	0.871	0.052	0.745	0.849	0.880	0.904	0.944
Acc	7	0.868	0.054	0.736	0.843	0.878	0.903	0.944
Acc	8	0.868	0.054	0.733	0.843	0.878	0.903	0.944
Acc	9	0.869	0.051	0.739	0.844	0.878	0.903	0.944
Acc	10	0.875	0.044	0.774	0.853	0.881	0.904	0.944
Err	6	0.129	0.052	0.056	0.096	0.120	0.151	0.255
Err	7	0.132	0.054	0.056	0.097	0.122	0.157	0.264
Err	8	0.132	0.054	0.056	0.097	0.122	0.157	0.267
Err	9	0.131	0.051	0.056	0.097	0.122	0.156	0.261
Err	10	0.125	0.044	0.056	0.096	0.119	0.147	0.226

Threshold in g/dL; Se: sensitivity, Sp: specificity, PPV: positive predictive value, NPV: negative predictive value, Acc: accuracy, Err: probability of decisional error