Tools & calculators
Understand study results, compare a week of activity and record the questions a paper leaves open. Interactive tools with clear methods and original sources.
How large is the difference?
Turn event counts from one trial into absolute and relative effects. The example is fictional.
Count people, not repeated events. Use independent groups and the same outcome and time window; do not combine raw totals from multiple trials.
10 fewer events per 1,000 participants in the intervention group.
NNT refers to one additional outcome over the stated period, assuming a causal treatment comparison. It is rounded up.
These are point estimates, not an uncertainty analysis. Read the original confidence intervals and study limitations. The result does not establish effectiveness or choose a treatment.
Show formulas
Risk = participants with event ÷ group total. Difference = intervention risk − control risk. RR = intervention risk ÷ control risk. Relative change = RR − 1. NNT = 1 ÷ absolute risk difference.
Make activity visible.
Add a week of aerobic activity and strength work. Compare the totals with WHO adult guidance.
| Day | Moderate | Vigorous | Strength |
|---|---|---|---|
| Mon | |||
| Tue | |||
| Wed | |||
| Thu | |||
| Fri | |||
| Sat | |||
| Sun |
Count each aerobic minute once. A strength day involves all major muscle groups. For 65+, the last column means varied activity combining balance and strength.
Within the 150–300 minute reference range.
1 vigorous minute counts as 2 moderate minutes for this comparison. This is a planning convention, not equal effort for every person.
WHO guidance: 150–300 moderate or 75–150 vigorous aerobic minutes weekly, plus strength on at least two days. Some activity is better than none. This general comparison does not account for individual conditions or pregnancy.
What does the study actually show?
A reading checklist for randomized controlled trials. Record what is reported and what remains uncertain.
Completion is not a verdict on quality. A clearly reported method can still be biased, and missing information is not proof that a method was wrong.
Use full methods, results, protocol and disclosures where available. This educational checklist does not implement or replace the formal Cochrane RoB 2 assessment.
Your inputs stay in this page. No account, upload or health profile is required.
Compare costs. Explore a business.
Pack cost calculatorPrice per month from your quantities
What does the label cost per month?
Compare purchase costs using a quantity you already know. This calculator does not suggest what or how much to take.
Formula: pack price ÷ pack units × your daily units × 30. Excludes shipping and taxes. Price comparison is not a safety or efficacy comparison.
Clinic business simulator
Change revenue, churn and operating costs. Inspect a twelve-month cashflow scenario.
Discussion
Community discussions
Member contributions. Share sources, disclose commercial interests, and avoid personal medical or dosing advice.
See how we select sources, distinguish evidence and label automated summaries. Read our method.