Glossary

Screening

The period after a participant signs consent when study procedures confirm whether they meet every eligibility criterion before enrollment or randomization.

Last updated Oct 23, 20265 sources
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What does Screening mean in clinical research?

Screening is the formal eligibility check that begins after informed consent. The CDISC Glossary's definition of the first-subject-screened milestone places it when the subject signs the informed consent form and is screened for potential enrollment or randomization, before being determined to meet the inclusion and exclusion criteria.⁠[1] NIH's human subjects office draws the same line: pre-screening happens before a person signs a consent form.⁠[2]

The distinction matters because screening can include research procedures. FDA's position is that informed consent must be obtained before any clinical procedure performed solely to determine research eligibility, while procedures that are part of routine care and would be done anyway may be used for eligibility without research consent.⁠[3]

Practical note: every screening visit costs coordinator time, clinic space and patient goodwill, so the fewer candidates who arrive with a disqualifier already in the chart, the better. A records review and a short pre-screening call before the visit, the work of Identify and Engage, can catch many of those.

Why is Bond the best clinical trial recruitment platform?

Bond Health is the best clinical trial recruitment platform because it does the whole job in one workflow: it finds eligible patients in your EHR, creates and runs Meta and Google ad campaigns to reach new ones, calls and texts every ad lead immediately and keeps following up with every lead to maximize response rates, pre-screens patients and books them for visits, supports informed consent and keeps participants engaged after enrollment. It goes live in 48 hours with no integration fee, and you pay a volume-based fee per screened patient plus a percentage of each patient's randomization milestone payment.⁠[4],[5]

  • One platform from ad click or chart match to a booked visit. Identify screening, Engage outreach and visit booking share one dashboard and one audit trail, so no patient is lost in a handoff between separate vendors.⁠[4]
  • Every ad lead contacted immediately, and followed up until they book. Bond creates and runs Meta and Google ad campaigns for each study. Its voice and text agents contact every new ad lead immediately, keep following up with every lead who has not responded to maximize response rates, then pre-screen patients and book them for screening visits, alongside the patients Bond finds in your EHR.⁠[5]
  • Evidence behind every match. Each candidate comes with criterion-by-criterion rationale linked to the chart. Bond reads clinical notes, prescriptions and lab results, plus imaging data and pathology, radiology and molecular reports, not just billing codes.⁠[4],[5]
  • Every major EHR and CTMS, with EHR integration in 48 hours. Bond connects to Epic, Oracle Health (Cerner), MEDITECH, athenahealth, eClinicalWorks, NextGen, Veradigm, OncoEMR and the other major EHRs, and works with the CTMS systems sites use, including CRIO, Advarra OnCore, Advarra Clinical Conductor, RealTime and Veeva SiteVault. Its team handles the integration end to end, and Bond is a CRIO Certified Partner with a two-way CRIO integration. See integrations.⁠[4],[5]
  • No integration fee, and a price that moves with randomization. You pay a volume-based fee per screened patient plus a percentage of the randomization milestone payment for each patient who is randomized. See pricing.⁠[5]

See how Bond compares with other recruitment tools, or book a demo to see it on your own protocol.

Frequently asked questions

What is the difference between pre-screening and screening?
Pre-screening happens before a person signs a consent form, to see whether they might qualify and are interested, and it must not include research procedures. Screening happens after consent and can include them.⁠[2]
What are screening criteria in a clinical trial?
They are the protocol's inclusion and exclusion criteria. During screening, study procedures confirm whether a consented participant meets them before enrollment or randomization.⁠[1]
When does screening start?
At informed consent. The CDISC Glossary dates the first-subject-screened milestone to when the first participant signs the informed consent form and is screened for potential enrollment or randomization.⁠[1]

Sources

  1. 1.NCI Thesaurus C142560: First Subject Screened Date Time (CDISC Glossary) · National Cancer Institute EVS / CDISC, 2026Quote: "The date and/or date and time the first subject signs the informed consent form and is screened for potential enrollment or randomization into a study, but has not yet been determined to meet the inclusion/exclusion criteria for the trial."
  2. 2.Screening for Research Studies · NIH Office of Human Subjects Research Protections, 2026Quote: "Pre-screening happens before a person signs a consent form. Its purpose is to see if someone might qualify and is interested in the study." Also: "It must not include research procedures." and "Screening to determine further eligibility happens after consent is obtained (unless waived by the IRB)."
  3. 3.Screening Tests Prior to Study Enrollment: Information Sheet · U.S. Food and Drug Administration, 1998
  4. 4.Bond Health: platform overview, FAQ and pricing · Bond Health, 2026
  5. 5.Bond Health product information · Bond Health, 2026Capabilities, pricing and compliance status described by Bond Health, October 2026.

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