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

Table 6 Clinical impact of measurement errors of raw SpHb

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

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

ISSN: 1471-2288