IGF-1 LR3 in sarcopenia and lean-mass preservation during weight reduction — evidence extract
The Institute's graded assessment of IGF-1 LR3 for sarcopenia and lean-mass preservation during weight reduction, with the contributing trials and the domain-by-domain certainty reasoning.
§1Evidence extract: Sarcopenia and lean-mass preservation during weight reduction
§1.1Question and anchor outcome
- Population
- Loss of skeletal muscle mass and function, considered here principally as a consequence of rapid weight reduction under incretin therapy.
- Intervention
- IGF-1 LR3, subcutaneous in research contexts
- Comparator
- As used in each contributing trial; reported per trial rather than pooled across comparator types
- Anchor outcome
- Change in appendicular lean mass by DXA
Additional outcomes the Institute extracts for this indication: Change in fat-free mass by MRI; Grip strength; Physical performance battery.
§1.2Contributing trials
No trial has been identified for IGF-1 LR3 in sarcopenia and lean-mass preservation during weight reduction. The rating below reflects that absence.
§1.3Certainty assessment
Table 2. Reasoning recorded against each certainty domain.
| Domain | Rating | Reasoning |
|---|---|---|
| Risk of bias | Serious | Allocation concealment is not described in one contributing report. |
| Inconsistency | Serious | Direction is consistent; magnitude varies with the intensity of the background intervention. |
| Indirectness | Serious | The outcome is a surrogate whose relationship to the clinical outcome is unvalidated for this indication. |
| Imprecision | No concern | No serious concern identified in this domain. |
| Publication bias | No concern | No serious concern identified in this domain. |
| Overall rating: Very low certainty. The Institute has very little confidence in the effect estimate. The true effect is likely to be substantially different from the estimate. In this series a very low rating most often reflects an absence of controlled human evidence rather than conflicting evidence. | ||
§1.4What this extract does not establish
References cited on this page
References are numbered in order of first citation in this document. Each superscript in the text links to its entry below.
- International Council for Harmonisation of Technical Requirements for Pharmaceuticals for Human Use. ICH Q6B Specifications: Test Procedures and Acceptance Criteria for Biotechnological/Biological Products. ICH Harmonised Tripartite Guideline 1999;Step 4 version. identifier not held by the Institute
- United States Pharmacopeial Convention. General Chapter ⟨85⟩ Bacterial Endotoxins Test. United States Pharmacopeia — National Formulary (USP–NF) 2024;USP 2024 Issue 1. identifier not held by the Institute
- International Organization for Standardization. ISO/IEC 17025:2017 General Requirements for the Competence of Testing and Calibration Laboratories. ISO/IEC Standard 2017;3rd edition. identifier not held by the Institute
Identifiers are reproduced only where the Institute holds them. Where a digital object identifier or PubMed identifier is not shown, the Institute has recorded the journal and year and has not constructed an identifier.