Evid Based Nurs 5:68-72 doi:10.1136/ebn.5.3.68

Evaluation of studies of assessment and screening tools, and diagnostic tests

Table 2

Size of likelihood ratios (LRs) and associated utility of changes in probability 13

Size of LRs Utility
+LR>10 or –LR<0.1 Generate large changes from pre to post-test probability
+LR 5–10 or –LR 0.1–0.2 Generate moderate shifts in pre to post-test probability
+LR 2–5 or –LR 0.5–0.2 Generate small changes in pre to post-test probability
+LR 1–2 or –LR 0.5-1 Generate little or no shift in pre to post-test probability

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