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Clinical Trial Summary

Rationale: Abnormally low and high levels of insulin-like growth factor-I (IGF-I) are both associated with increased metabolic risk. Since (U-shaped) associations of IGF-I, within the normal range, have also been found with cardiovascular risk factors and disease in the general population, it would be interesting to investigate if this association can also be found in growth hormone deficient (GHD) adults treated with Growth Hormone (GH). This could be of interest for endocrinologists prescribing GH in clinical practice because strict dosing may become even more important. Next to that, scientific evidence for clinical practice is wanted.

Objective: Next to cardiovascular risk factors (main objectives: body composition and lipid profile; secondary objectives: remainder) we investigate the effect on glucose metabolism, physical performance, and neuropsychological functioning of different levels of IGF-I in GH treated GHD men and women.

Study design: Open-label randomized trial.

Study population: At least 32 subjects, both childhood as adult onset GHD men and women, receiving GH treatment for at least one year, with an age between 20 and 65 years.

Intervention: At entry subjects are already receiving GH treatment according to general clinical practice, and are expected to demonstrate an IGF-I concentration of 0 - 1 SD score (SDS) (normal dose). The group of men and group of women will be randomized to receive either a decrease of their regular dose of GH treatment (IGF-I target level of -2 - -1 SDS) (low dose), or an increase of their regular dose, (IGF-I target level of 1 - 2 SDS) (high dose) for at least 24 weeks.


Clinical Trial Description

n/a


Study Design

Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Treatment


Related Conditions & MeSH terms


NCT number NCT01877512
Study type Interventional
Source VU University Medical Center
Contact
Status Completed
Phase Phase 4
Start date May 2013
Completion date April 2014

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