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Developing a Salivary Antibody Multiplex Immunoassay to Measure Human Exposure to Environmental Pathogens

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Published on: September 12, 2016

Sample size consideration for immunoassay screening cut-point determination.

Jianchun Zhang¹, Lanju Zhang, Harry Yang

¹a MedImmune LLC , Gaithersburg , Maryland , USA.

Journal of Biopharmaceutical Statistics

|April 5, 2014

Summary

This summary is machine-generated.

Determining the sample size for immunoassays is crucial for accurate cut point determination. This study introduces a systematic approach and helpful tables to guide scientists in sample size calculations for robust immunogenicity assays.

Keywords:

ANOVA Antidrug antibody Cut point Immunogenicity Sample size Variance component model

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Last Updated: May 1, 2026

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Area of Science:

Biopharmaceutical Development
Immunology
Assay Validation

Background:

Biopharmaceutical products are rapidly increasing, necessitating robust immunogenicity assessment.
Antidrug antibodies from biopharmaceuticals can cause adverse immune reactions.
Regulatory agencies require validated assays for immunogenicity testing.

Purpose of the Study:

To address the lack of clear guidelines for sample size determination in immunoassay validation.
To propose a systematic methodology for calculating the required sample size for immunoassays.
To provide practical tools, such as tables, for scientists to apply these methods.

Main Methods:

Reviewing current practices and limitations in immunoassay sample size determination.
Developing a systematic approach based on statistical principles for sample size calculation.
Generating tables to simplify the application of the proposed methodology.

Main Results:

A structured framework for determining sample size in immunoassays has been established.
The proposed method aims to ensure precise cut point determination.
The provided tables offer practical guidance for assay development scientists.

Conclusions:

A systematic approach to sample size determination is essential for reliable immunoassay validation.
Implementing this methodology will enhance the precision of cut point determination.
The study provides valuable resources for scientists working with immunogenicity assays.