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Absolute Risk Reduction Calculator
Quick answer
If control group: people with the event is 20, control group: total people are 100, treatment group: people with the event is 10 and treatment group: total people are 100, the absolute risk reduction is 10 %, the risk in the control group is 20 % and the risk in the treatment group is 10 %.
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Absolute risk reduction
10%
Calculated directly from the values you entered above.
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Absolute risk reduction by control group: people with the event
If control group: people with the event goes from 20 to 30, absolute risk reduction changes from 10 % to 20 % (+100%).
| Control group: people with the event | Absolute risk reduction |
|---|---|
| 10 | 0 % |
| 15 | 5 % |
| 20start | 10 % |
| 30 | 20 % |
| 40 | 30 % |
Absolute risk reduction by control group: total people
If control group: total people goes from 100 to 150, absolute risk reduction changes from 10 % to 3.33 % (−67%).
| Control group: total people | Absolute risk reduction |
|---|---|
| 50 | 30 % |
| 75 | 16.67 % |
| 100start | 10 % |
| 150 | 3.33 % |
| 200 | 0 % |
Absolute risk reduction by treatment group: people with the event
If treatment group: people with the event goes from 10 to 15, absolute risk reduction changes from 10 % to 5 % (−50%).
| Treatment group: people with the event | Absolute risk reduction |
|---|---|
| 5 | 15 % |
| 7.5 | 12.5 % |
| 10start | 10 % |
| 15 | 5 % |
| 20 | 0 % |
HEALTH & FITNESS GUIDE
A quick guide to Absolute Risk Reduction Calculator
Use it to get an accurate absolute risk reduction in seconds — free, with no sign-up.
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See your absolute risk reduction the moment you enter your numbers.
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How to Use the Absolute Risk Reduction Calculator
1
Enter Control group: people with the event
Provide your control group: people with the event.
2
Enter Control group: total people
Provide your control group: total people.
3
Enter Treatment group: people with the event
Provide your treatment group: people with the event.
4
View Your Results
Get your absolute risk reduction instantly, calculated on our server.
What is Absolute Risk Reduction Calculator?
This health & fitness tool works out your absolute risk reduction instantly, so you don't have to do the math by hand.
“One quick calculation, so you always know your absolute risk reduction before you decide.”
What Affects Your Absolute risk reduction
Your absolute risk reduction depends on the values below.
Control group: people with the event
Changing your control group: people with the event changes your absolute risk reduction.
Control group: total people
Changing your control group: total people changes your absolute risk reduction.
Treatment group: people with the event
Changing your treatment group: people with the event changes your absolute risk reduction.
Treatment group: total people
Changing your treatment group: total people changes your absolute risk reduction.
Example Result
Here's what you can expect from an absolute risk reduction calculator calculation:
- Control group: people with the event
- 20
- Control group: total people
- 100
- Treatment group: people with the event
- 10
- Treatment group: total people
- 100
- Absolute risk reduction
- 10 %
- Risk in the control group
- 20 %
- Risk in the treatment group
- 10 %
- Relative risk reduction
- 50 %
- Number needed to treat
- 10
Frequently Asked Questions
- How does control group: people with the event affect absolute risk reduction?
- If control group: people with the event goes from 20 to 30, absolute risk reduction changes from 10 % to 20 % (+100%).
- How does control group: total people affect absolute risk reduction?
- If control group: total people goes from 100 to 150, absolute risk reduction changes from 10 % to 3.33 % (−67%).
- How to calculate absolute risk reduction calculator?
- Fill in control group: people with the event, control group: total people and treatment group: people with the event in the Absolute Risk Reduction Calculator above and your absolute risk reduction is calculated instantly. Change any value to see how the result responds.
- What does an example absolute risk reduction calculator calculation look like?
- If control group: people with the event is 20, control group: total people are 100, treatment group: people with the event is 10 and treatment group: total people are 100, the absolute risk reduction is 10 %, the risk in the control group is 20 % and the risk in the treatment group is 10 %.
- What do I need to enter in the Absolute Risk Reduction Calculator?
- Control group: people with the event, Control group: total people (at least 1), Treatment group: people with the event and Treatment group: total people (at least 1). The absolute risk reduction updates as soon as you change a value, and it is shown in %.
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