RATER SERVICES

Drive conclusive research with improved COA data quality

IQVIA Rater Services (formerly Cronos Clinical Consulting Services) supports clinical trials by improving the consistency, accuracy, and objectivity of clinical outcome assessments (COAs). Through expert rater training, oversight, and independent assessments, we reduce variability, protect endpoints, and deliver reliable, regulatory-ready trial data.

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Solutions Research & Development Consulting Patient Centered Solutions Rater Services

Quality rater solutions

With over 17 years of expertise dedicated to improving data quality, we provide specialized clinical service solutions that seamlessly combine science, technology, and innovation to drive successful outcomes. By collaborating directly with sponsors, either as part of a full contract with IQVIA clinical research teams or through a third-party CRO, we deliver tailored solutions specifically designed for CNS indications.

These Rater Services ensure that neurological and psychiatric clinical trials overcome unique challenges – including bias, variability, and human error – resulting in accurate, reliable data that supports confident decision-making and accelerates your study’s success.

COMPREHENSIVE SOLUTIONS

Proven Rater Services to address your study needs

Our Rater Services are designed to address common sources of variability and risk throughout the study lifecycle, including:

Rater training and calibration
Ongoing rater oversight and intervention
Independent and centralized ratings
Eligibility confirmation
Remote and telehealth-enabled assessments
Participant and study partner engagement support
Scale sourcing, translation, modifications & CRF supply

IQVIA Rater Services are designed to support high quality, defensible COA data and align with evolving regulatory expectations across global clinical trials.

OUR CNS EXPERIENCE

Broad psychiatric and neurological expertise

Our Rater Services are backed by deep scientific and operational expertise across psychiatric and neurological indications, including:

Major Depressive Disorder (MDD)
Schizophrenia
Bipolar Disorder
Generalized Anxiety Disorder (GAD)
Post-traumatic Stress Disorder (PTSD)
Alzheimer’s Disease
Lewy Body, Frontotemporal & Vascular Dementia
Parkinson’s Disease
Tardive Dyskinesia
Tourette’s Syndrome
Attention Deficit Hyperactivity Disorder (ADHD)

RATERS TRAINED

8,600+

SITES

5,400+

Countries Supported

55+

Frequently Asked Questions – Rater Services

Answers to common questions about Rater Services for CNS trials

Rater Services include training, calibration, oversight, and independent assessments designed to improve the consistency, reliability, and accuracy of clinical outcome assessment (COA) data, particularly in psychiatric and CNS clinical trials.

CNS and psychiatric trials are especially vulnerable to variability, bias, and human error due to subjective assessments and complex endpoints. Rater Services help reduce these risks and support reliable, regulatory ready data.

Rater Services improve COA data quality by standardizing training, monitoring rater performance over time, intervening when risks emerge, and applying independent or centralized ratings when appropriate.

Rater oversight involves continuous monitoring of rater performance to identify drift, variability, or protocol deviations early. This allows teams to intervene proactively, before data quality or study integrity is compromised.

Independent ratings are assessments conducted by trained raters who are separate from the investigative site. These ratings help minimize bias, improve endpoint reliability, and support confident regulatory and clinical decision making.

Rater Services support eligibility assessment and/or confirmation by independently verifying key inclusion and exclusion criteria, helping reduce enrollment errors and protocol deviations early in the study.

Yes. IQVIA Rater Services can be delivered as part of a full IQVIA clinical trial partnership, integrated into studies managed by third party CROs, or can be contracted directly with sponsors.

Rater Services are particularly valuable in psychiatric and neurological indications such as major depressive disorder, schizophrenia, bipolar disorder, Parkinson’s disease, dementia, ADHD, and other CNS conditions due to the subjective nature/complexity of instruments in these indications.

Yes. Rater Services can support remote, hybrid, and decentralized trial models through telehealth enabled assessments and centralized rater solutions.

Rater Services are commonly used by clinical operations, clinical science, outcomes research, and data quality teams responsible for endpoint integrity and regulatory readiness.

Drive conclusive research with improved COA data quality​