The Case for Data Driven Clinical Trial Recruitment

Written by Hart, Inc. | October 2026

Clinical trial teams know what they need: enough eligible patients, enrolled on time. What they often lack is a clear view of where those patients are. Research has shown that at least 10% of planned trials never enroll a single patient, and at least 40% miss enrollment targets.

These shortfalls are why data-driven clinical trial recruitment has become a planning necessity.

Data-driven clinical trial recruitment means that site selection, patient screening and outreach are based on analysis of patient data rather than on intuition and memory of the investigators. The research team gathers patient data from electronic health records (EHRs), laboratory results, medications and visit history, then compares the data to inclusion/exclusion criteria for the planned trial.

While conventional teams select sites first and look for patients later, those taking a patient data-driven approach find the patients first.

Why Traditional Clinical Trial Recruitment Fails So Often

There are two main reasons why traditional clinical trial recruitment methods fail repeatedly: Fragmented data and manual chart review. Data is fragmented because clinical, laboratory and imaging records are stored in different databases and in different formats, and potentially eligible patients frequently fall through the cracks.

With manual chart review, a patient list is built by manually reviewing patient files one at a time, a laborious process. It not only can take months to complete, the nature of a one-time chart pull means that some information can quickly become obsolete.

Area	Traditional approach	Data-driven approach
Data freshness	One-time extracts	Continuous synchronization with live EHR data
Source coverage	Single EHR vendor	Multiple EHRs, labs, imaging, registries
Patient matching	Manual chart review	Automated, criteria-based matching
Feasibility checks	Weeks to months	Near real-time cohort and site counts

Core Parts of a Data Driven Clinical Trial Recruitment Strategy

Unified patient record — Linkage across multiple EHRs, labs, and registries allows visibility of the patient’s complete journey rather than just one visit.
Criteria-based matching — The matching engine evaluates demographic, diagnosis, medication, lab, and procedure data against trial criteria.
Feasibility analysis prior to study activation — Counting eligible patients within the network prior to study initiation helps sponsors choose the most appropriate site to recruit enough patients. It also helps detect weaknesses prior to finalizing the protocol.
Continual refreshing and privacy safeguards — Real-time synchronization provides the most up-to-date lists. Patient de-identification and audit trails facilitate compliance with HIPAA and IRB regulations.

Recruitment Metrics Worth Tracking

Metric	What it tells you	Reference point
Sites enrolling zero patients	Whether site selection matches real patient volume	At least 10% of sites in a typical trial
Screen-to-enrollment ratio	Accuracy of matching	Lower screening failure saves coordinator time
Enrolled vs. eligible demographics	Whether recruitment reflects the real population	Gaps point to outreach problems
Dropout rate	Subject retention	19.1% in late-phase studies in 2019

A 2020 study from the Tufts Center for the Study of Drug Development found that enrollment timelines matched or beat plans in 77% of studies, though late-phase dropout rose from 15.3% in 2012 to 19.1% in 2019.

What to Look for in Clinical Trial Recruitment Systems

Ask any vendor four questions:

Does your system read live EHR data or a stale copy?
Does it work across more than one EHR vendor?
Can it show why a patient matched?
Is every data access logged?

For Hart's HealthMatch™, the answer is yes to all of those questions. HealthMatch™connects to more than 150 EHR systems and can reduce manual chart review time by up to 80%. You can test claims like that in your own pilot.

Every patient is one person, and we believe their data should be too. Hart provides enterprise technology that turns legacy applications into a single source of truth. That’s the Power of One.

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