Evidence-Based Medicine Calculator Toolbox

💊 Odds Ratio to NNT Converter

Conversion

Instructions

Enter a number > 1 or < 1 in Odds Ratio (OR).
Enter PEER between 0 and 1 (Patient's Expected Event Rate).

Odds Ratio (OR)

Patient's Expected Event Rate (PEER)

Number Needed to Treat (NNT)

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🔬 Diagnostic Test Calculator

2x2 Table

Contingency Table

Disease (+)

No Disease (-)

Test Pos (+)

Test Neg (-)

⚡ Or enter Likelihood Ratios directly:

LR+

LR-

Results (Estimate & 95% CI)

Sensitivity ----

Specificity ----

PPV ----

NPV ----

Likelihood Ratio + (LR+) ----

Likelihood Ratio - (LR-) ----

More Details on Sensitivity and Specificity

🔮 Prospective Study Calculator

Cohort

Outcome Table

Outcome (+)

No Outcome (-)

Treated

Not Treated

Results

Chi-squared ----

Relative Risk (RR) ----

ARR ----

NNT ----

Calculation of Odds Ratio (OR) / Relative Risk (RR)

🔎 Case-Control Study Calculator

Retrospective

Exposure Table

Case

Control

Exposed

Not Exposed

Results

Chi-squared ----

Odds Ratio (OR)

----

95% CI: ----

Why Odds Ratio?

🎲 RCT Calculator

Trial

Results Table

Outcome

No Outcome

Experimental

Control

Results

Chi-squared ----

Relative Risk (RR) ----

RRR ----

ARR ----

NNT ----

More Details on Number Needed to Treat (NNT)

🎓 Educational Prescriptions Logbook

Learning

🤔 What is it?

💡 Why use them?

🚀 Tips for Success

📥

Download Resources

Access templates and the online logbook system.

Login required for online logbook access.

💊 Odds Ratio to NNT Converter

Instructions

🔬 Diagnostic Test Calculator

Contingency Table

Results (Estimate & 95% CI)

More Details on Sensitivity and Specificity

🔮 Prospective Study Calculator

Outcome Table

Results

Calculation of Odds Ratio (OR) / Relative Risk (RR)

🔎 Case-Control Study Calculator

Exposure Table

Results

Why Odds Ratio?

🎲 RCT Calculator

Results Table

Results

More Details on Number Needed to Treat (NNT)

🎓 Educational Prescriptions Logbook

🤔 What is it?

💡 Why use them?

🚀 Tips for Success

Download Resources

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