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