TABLE 2.

Diagnostic value guidelines

LR+	Interpretation
> 10	Large and often conclusive increase in the likelihood of disease
5 – 10	Moderate increase in the likelihood of disease
2 – 5	Small increase in the likelihood of disease
1 – 2	Minimal increase in the likelihood of disease
1	No change in the likelihood of disease
LR−	Interpretation
1	No change in the likelihood of disease
0.5 – 1.0	Minimal decrease in the likelihood of disease
0.2 – 0.5	Small decrease in the likelihood of disease
0.1 – 0.2	Moderate decrease in the likelihood of disease
< 0.1	Large and often conclusive decrease in the likelihood of disease

LR+ = Positive Likelihood Ratio

LR− = Negative Likelihood Ratio