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Table 6 Sensitivity, specificity and predictive values1 for different cut-off points in the indicator OLOS-PLOS.

From: Observed-predicted length of stay for an acute psychiatric department, as an indicator of inpatient care inefficiencies. Retrospective case-series study.

Positive if greater than or equal to Sensitivity Specificity Positive predictive value2 Negative predictive value2
-12 0.977 0.133 0.262 0.948
-11 0.932 0.161 0.260 0.882
-10 0.932 0.203 0.270 0.904
-9 0.932 0.273 0.288 0.927
-8 0.886 0.301 0.286 0.893
-7 0.818 0.350 0.284 0.859
-6 0.795 0.406 0.297 0.862
-5 0.727 0.427 0.286 0.832
-4 0.727 0.503 0.316 0.854
-3 0.705 0.552 0.332 0.856
-2 0.659 0.622 0.355 0.852
-1 0.591 0.685 0.372 0.841
0 0.591 0.699 0.383 0.844
1 0.500 0.769 0.406 0.830
2 0.455 0.797 0.414 0.822
3 0.409 0.825 0.425 0.816
4 0.386 0.839 0.431 0.812
5 0.364 0.874 0.477 0.813
6 0.341 0.909 0.542 0.814
7 0.318 0.951 0.672 0.815
8 0.250 0.951 0.617 0.801
9 0.250 0.965 0.693 0.803
10 0.250 0.972 0.738 0.804
  1. 1 For detecting inefficiencies. 2 Prevalence (a priori probability) of presenting inefficiencies = 0.24. Observed prevalence in the sample.