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CRIMSON: A multicentre, randomised, sham-controlled (and active controlled in the USA), double-masked, 72 week trial to study the safety, tolerability, pharmacokinetics, and efficacy of 3 dosing regimens of intravitreal BI 764524 in patients with moderate to severe non-proliferative diabetic retinopathy

Status
Recruiting
Phases
Phase 2
Study type
Interventional
Source
EU CTIS
Registry ID
CTIS2023-508891-12-00
Acronym
1436-0007
Enrollment
103
Registered
2024-10-08
Start date
2024-11-28
Completion date
Unknown
Last updated
2026-01-26

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Diabetic retinopathy

Brief summary

The primary endpoint is the occurrence of a ≥2 step improvement compared with baseline in DRSS level in the study eye at Week 52 as assessed by UWF-CFP images (within the 7-field grid).

Detailed description

The key secondary endpoint is the occurrence of VTCs, defined as PDR and/or anterior segment NV, or development of CI-DME, in the study eye between baseline and Week 52, Absolute change from baseline of BCVA [ETDRS letters] in the study eye at Week 52, Absolute change from baseline of central subfield thickness (CST) [μm], as assessed by spectral domain optical coherence tomography (SD-OCT), in the study eye at Week 52, Occurrence of a ≥2 step worsening of DRSS in the study eye between baseline and Week 52 as assessed by UWF-CFP images (within the 7-field grid), Occurrence of PDR and/or anterior segment NV in the study eye between baseline and Week 52, Occurrence of CI-DME in the study eye between baseline and Week 52, Occurrence of drug-related AEs between baseline and EOS, Occurrence of ocular AEs in the study eye between baseline and EOS, Occurrence of ocular AEs of special interest in the study eye between baseline and EOS

Interventions

Sponsors

Boehringer Ingelheim International GmbH
Lead SponsorINDUSTRY

Eligibility

Sex/Gender
All
Age
18 Years to No maximum

Design outcomes

Primary

MeasureTime frame
The primary endpoint is the occurrence of a ≥2 step improvement compared with baseline in DRSS level in the study eye at Week 52 as assessed by UWF-CFP images (within the 7-field grid).

Secondary

MeasureTime frame
The key secondary endpoint is the occurrence of VTCs, defined as PDR and/or anterior segment NV, or development of CI-DME, in the study eye between baseline and Week 52, Absolute change from baseline of BCVA [ETDRS letters] in the study eye at Week 52, Absolute change from baseline of central subfield thickness (CST) [μm], as assessed by spectral domain optical coherence tomography (SD-OCT), in the study eye at Week 52, Occurrence of a ≥2 step worsening of DRSS in the study eye between baseline and Week 52 as assessed by UWF-CFP images (within the 7-field grid), Occurrence of PDR and/or anterior segment NV in the study eye between baseline and Week 52, Occurrence of CI-DME in the study eye between baseline and Week 52, Occurrence of drug-related AEs between baseline and EOS, Occurrence of ocular AEs in the study eye between baseline and EOS, Occurrence of ocular AEs of special interest in the study eye between baseline and EOS

Countries

Germany, Hungary, Italy, Poland, Spain

Outcome results

None listed

Source: EU CTIS · Data processed: Feb 4, 2026