Number needed to screen

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Revision as of 08:12, 9 December 2007 by imported>Robert Badgett
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The number needed to screen is a way of summarizing the benefit of a screening program in health care.[1] The calculations are derived from the results of a randomized controlled trial of a screening program.

Two-by-two table for a screening program
Outcome
Present Absent
Screening Screen group Cell A Cell B Total in screening group
Control group Cell C Cell D Total in control group
Total with outcome Total without outcome

Calculations

Event rates

Measures of efficacy

Example

References

See also

Mass screening