Independent · non-commercial · publishes on a quarterly cycle|Current cycle 2026 Q3
Compound Evidence InstituteEvidence synthesis · established 2023Graded assessments of compounds, trials, methods and supply
Document set current to 30 July 2026
Trial abstract

ATTAIN-1 — structured trial abstract

ATTAIN-1 — Orforglipron in obesity: randomised, double-blind, placebo-controlled

Document identifier
CEI-TR-0045
Series
Trial abstract
Version
1.1
Published
21 Jan 2025
Last reviewed
21 Feb 2026
Next review
21 Feb 2028
Identifier
10.71829/cei.trial.45
Certainty
Moderate
Cycle
2025 Q1
Phase
Phase 3
Status
Reported

§1Structured abstract

§1.1Objective

To evaluate Orforglipron in obesity and overweight in adults, against the comparator specified in §2, with the primary endpoint stated below.

§1.2Design

Design
Randomised, double-blind, placebo-controlled, parallel-group
Masking
Double-blind (participant, investigator and sponsor)
Phase
Phase 3
Randomised participants
not recorded by the Institute
Duration of the primary analysis period
72 weeks
Sponsor class
Manufacturer-sponsored
Registry identifier
not reproduced — see the note in §1.5

§1.3Primary endpoint

Percentage change in body weight from baseline to week 72

§1.4Principal result

The Institute holds a headline result indicating a weight effect intermediate between the injectable single agonists and placebo, and awaits the full publication before reproducing a point estimate.

The Institute does not reproduce an effect estimate from a press release. Where only a sponsor announcement exists, the monograph says so.

§1.5Provenance of this abstract

Table 1. Field-by-field provenance. The Institute records which fields are extracted from a source and which are its own reconstruction, so that a reader can tell the two apart without leaving the page.

FieldProvenanceNote
Design, phase, duration, primary endpointExtractedReproduced from the published report or the registry record.
Randomised participantsNot heldNot recorded by the Institute. The field is left empty rather than estimated.
Principal resultExtractedReproduced as published, with the confidence interval where the Institute holds it.
Centres, countries and baseline characteristicsReconstructedDerived by the Institute from the design class and the randomised total. Presented in §2 as an illustrative operational profile and marked as such. These figures are not published characteristics of this trial.
Certainty assessmentInstitute judgementThe Institute’s own domain-by-domain assessment, with reasoning recorded against each domain in §4.
Registry identifierNot heldThe Institute does not reproduce a registry identifier it has not verified and never constructs one. Documents are referenced by the Institute’s own identifier.
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