Sample Size | Research by Physiosimplified

Expert Sample Size Calculation for Your Research

Our expert statisticians ensure your research is adequately powered to detect meaningful clinical effects, providing rigor and ethical validity to your study.

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Fill out the details of your study below. Once submitted, our statisticians will review your protocol and provide a comprehensive sample size report.

Required Documents

Detailed study protocol or synopsis

Reference articles for effect size

Primary outcome definition

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Ethical Note

We do not manipulate data to achieve desired significance levels. All calculations are strictly based on provided inputs and standard statistical principles.

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What You Receive

Recommended N

Detailed breakdown of total sample size required, including per-group counts and adjustments for anticipated attrition.

Methodological Justification

Ready-to-use write-up for your IRB/Ethics committee or protocol, explaining the statistical formulas and assumptions used.

Reference Citations

Full bibliographic references for the software, effect sizes, and formulas employed in your specific calculation.

The Importance of Sample Size

Sample size is the cornerstone of statistical power. An undersized study might fail to detect a truly effective treatment, wasting resources and potentially harming patients by missing breakthroughs.

Conversely, an oversized study is ethically questionable as it exposes more participants than necessary to experimental risks. Correct calculation ensures: