Posted in Blog on 13-03-2026

Phase 4 and real-world evidence: not a spectrum, a strategic choice

Phase 4 is a post-approval interventional trial that fulfills regulatory commitments. Real-world evidence spans PASS, PAES, HEOR, natural history studies, and more — each built to answer a different question for a different stakeholder. This piece maps the full range of post-approval study types, where Phase 4 and RWE genuinely converge, and how to treat both as part of a coordinated evidence strategy.


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Posted in Blog on 23-09-2025

On-site ePRO in Action: A Recap of Castor’s Product Spotlight

Castor’s on-site ePRO adds in-clinic PRO capture to the ePRO/CDMS workflow you already use. Staff use a site device or share a QR code for BYOD. Progress saves automatically during completion, and participants can finish remotely. It reduces missed baseline at FPI. It supports decentralized and hybrid designs. It improves audit readiness and compliance tracking. No separate site app or provisioned hardware. This article recaps the webinar, shows the clinic flow, and answers common questions.


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Posted in Blog on 26-08-2025

EQ-5D in European Trials: When Generic QoL Measures Actually Matter

Analysis of 735 FDA drug approvals reveals 0% EQ-5D labeling inclusion, while European HTA bodies demonstrate 18% technology appraisal acceptance. Companies repositioning EQ-5D from FDA regulatory strategy to European HTA advantage secure faster reimbursement approvals. German HTA bodies show highest global acceptance rates, NICE maintains established preference despite 5L controversies, and French HAS recognizes EQ-5D within economic evaluation frameworks. Strategic implementation focuses on health economic modeling rather than clinical outcome measurement, with HTA-optimized deployment (12-16 weeks) providing superior ROI versus regulatory claim attempts. Success requires country-specific value sets and preference weights.


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