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An aid in assessing whether a risk factor might be a worthwhile screening test

Risk-Screening Converter

Many risk factors for disease are suggested as screening tests when there is no prospect that they could be useful in screening. To avoid this it is useful to know the quantitative equivalence between the value of a risk factor and its screening performance in terms of the detection rate (sensitivity) for a specified false-positive rate.

Here is an interactive risk-screening converter that does this. It is intended for people engaged in research into risk factors and disease and for those who give advice on applying such research findings into medical practice. It should help to distinguish effective screening methods from relatively ineffective ones and so improve clinical guidelines relating to screening and the prediction of disease.

This converter is described in:

Wald NJ, Morris JK. Assessing risk factors as potential screening tests. A simple assessment tool. Arch Intern Med 2010.

To use the risk-screening converter, download the software here. Then:-

If you are using 'Chrome', click the 'riskscreeningconverter' icon at the bottom-left corner of the screen.

If you are using 'Internet Explorer', click 'Open' button at the bottom of the screen.

Then choose the option you want by clicking the appropriate pink box, enter the numbers you select in the green boxes and press the 'Return' key or click anywhere on the screen to conplete the risk-screening conversion.

Risk screening converter
 
Medical Screening Society, Wolfson Institute of Preventive Medicine, Charterhouse Square, London EC1M 6BQ