QRISK Estimate Calculator

Work out qrisk estimate instantly with clear inputs, formula shown and shareable results.

About QRISK Estimate Calculator

Interprets a QRISK 10-year cardiovascular risk percentage against the NICE 10% treatment threshold and converts it into events per 100 people and a number needed to treat.

Formula

Threshold and NNT

Gap = QRISK% - 10; absolute benefit = QRISK% x relative risk reduction / 100; NNT = 100 / absolute benefit

Worked example

With the default values below, QRISK Estimate Calculator returns NICE risk band of At or above the NICE 10% treatment threshold. Change any input above and every figure here is recalculated in your browser.

Inputs used

QRISK 10-year cardiovascular riskaccepts 0–100: 14
Ageaccepts 25–84 years: 58 years
Relative risk reduction from treatmentaccepts 5–60 %: 25 %

Results

NICE risk band: At or above the NICE 10% treatment threshold
Predicted events per 100 people in 10 years: 14.0
Percentage points above the 10% threshold: 4.0
Number needed to treat: 29

Step by step

1Values used
2Threshold and NNT
3NICE risk band= At or above the NICE 10% treatment threshold
4Predicted events per 100 people in 10 years= 14.0
5Percentage points above the 10% threshold= 4.0
6Number needed to treat= 29

Assumptions and limits

The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 1 decimal place, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.
This is an estimate for general information and not professional medical advice. See the full disclaimer for the limits that apply to this kind of calculator.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.

Frequently Asked Questions

Why is 10% the threshold?

NICE CG181 recommends offering statin therapy for primary prevention when 10-year QRISK risk reaches 10% or more.

What does number needed to treat mean?

How many similar people would need treatment for 10 years to prevent one cardiovascular event.