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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.