International Guillain-Barré Syndrome Outcome Study (IGOS)
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|ClinicalTrials.gov Identifier: NCT01582763|
Recruitment Status : Active, not recruiting
First Posted : April 23, 2012
Last Update Posted : February 22, 2023
International GBS Outcome Study (IGOS) is a study conducted by the members of the Inflammatory Neuropathy Consortium (INC) and Peripheral Nerve Society (PNS) on disease course and outcome in Guillain-Barré syndrome (GBS).
The IGOS aims to identify clinical and biological determinants and predictors of disease course and outcome in individual patients with Guillain-Barré syndrome, as early as possible after onset of disease.
|Condition or disease|
|Guillain-Barré Syndrome Miller Fisher Syndrome|
GBS is a post-infectious immune-mediated polyradiculoneuropathy with a highly diverse clinical course and outcome despite partially effective forms of treatment(immunoglobulins and plasma exchange). Outcome in patients with GBS has not improved in the last two decades. At present about 10 to 20% of patients remain severely disabled and about 5% die. One explanation for this stagnation is the highly variable clinical course of GBS and the lack of knowledge about the factors that determine the clinical course in individual patients with GBS. GBS may consist of distinct pathogenic subgroups, in which disease onset and progression is influenced by different types of preceding infections, anti-neural antibodies and genetic polymorphisms. Optimal treatment of individual patients may depend on the pathogenesis and clinical severity. Patients with severe forms of GBS may possibly need more intensive treatment to recover. Patients with a milder course that fully recover after standard therapy could suffer from possibly more side effects of more aggressive forms of treatment. This could only be possible if there are prognostic models that accurately predict the clinical course in individual patients. Ideally such models should be based on clinical and biological predictors that are strongly associated with disease course and known as early as possible in the acute phase of illness, when treatment with immunomodulatory therapy is most effective. Prognostic models could help to guide selective trials in specific GBS subtypes. Because of this it will be possible to treat GBS with more effective and more individual therapy.
This study aims to identify clinical and biological determinants and predictors of disease course and outcome in individual patients with Guillain-Barré syndrome, as early as possible after onset of disease. This information will be used to understand the diversity in clinical presentation and response to treatment of GBS. This information will also be used to develop new prognostic models to predict the clinical course and outcome accurately in individual patients with GBS.
To address these research questions it is required to conduct a prospective study with standardized collection of clinical data and biomaterials from a large group of well-defined GBS patients during a long follow-up period. Such an extensive study in a relatively rare disease as GBS can be addressed only by intensive international collaboration.
|Study Type :||Observational|
|Actual Enrollment :||2000 participants|
|Official Title:||International GBS Outcome Study (IGOS): A Prospective INC Study on Clinical and Biological Predictors of Disease Course and Outcome in Guillain-Barré Syndrome (GBS).|
|Actual Study Start Date :||May 1, 2012|
|Estimated Primary Completion Date :||September 1, 2024|
|Estimated Study Completion Date :||September 2024|
Guillain-Barré syndrome >1000, follow-up 1-3 years
Normal controls (NC)
Infectious controls (IC)
Other neurological diseases (OND)
- Guillain Barré Syndrome (GBS) disability score [ Time Frame: 1 year ]7 scores for disability, ranging from a healthy state to dead; 0 = healthy state to 6 = dead
- MRC sum score [ Time Frame: 1 year ]the sum of MRC scores of six muscle groups, including shoulder abductors, elbow flexors, wrist extensors, hip flexors, knee extensors, and foot dorsiflexors on both sides, ranging from 60 (normal) to 0 (quadriplegic). 0 = no visible contraction to 5 = normal strength, score per muscle group
- Overall Neuropathy Limitations Scale (ONLS) [ Time Frame: 1 year ]Questions regarding affection of ability in both arms and legs, with a score from 0 = normal to 5 = disability in both arms preventing all purposeful movements and a score from 0 = walking/climbing stairs/running not affected to 7 = restricted to wheelchair or bed most of the day, unable to make any purposeful movements of the legs
- Fatigue Severity Scale (FSS) [ Time Frame: 1 year ]the FSS is a simple and reliable instrument to assess and quantify fatigue for clinical and research purposes.
- EurQol EQ-5D Health Questionnaire [ Time Frame: 1 year ]EQ-5D® is a standardized instrument for use as a measure of health outcome with a scale from 0 = the worst health you can imagine to 100 = the best health you can imagine
- Rasch-built Overall Disability Scale (R-ODS) [ Time Frame: one year ]The R-ODS is a linearly weighted scale that specifically captures activity and social participation limitations in patients with GBS, CIDP, and MGUSP. Compared to the Overall Disability Sum Score, the R-ODS represents a wider range of item difficulties, thereby better targeting patients with different ability levels. If responsive, the R-ODS will be valuable for future clinical trials and follow-up studies in these conditions. Score from 0 = not possible to perform any activity to 48 = easy to perform any activity
Biospecimen Retention: Samples With DNA
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01582763
|Principal Investigator:||Bart Jacobs, Dr.||Erasmus Medical Center|