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Eligibility

Screening — What It Means in Clinical Trials

Plain English Definition

Screening is the process of checking whether you meet all the eligibility criteria for a trial. It usually involves medical tests, blood work, imaging scans, and a review of your health history. Screening can take a few days to several weeks, and not everyone who is screened will qualify.

Why It Matters

Screening is your first real step toward joining a trial. It is free, and even if you do not qualify, the tests may provide useful information about your health. Be prepared for multiple appointments.

Example

A listing might say: "Screening period: up to 28 days. Includes physical exam, ECG, blood tests, and CT scan." All of these tests determine if you can safely participate.

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