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Colchicine Randomized Double-Blind Controlled Crossover Study in Behcet's Disease

Information source: Tehran University of Medical Sciences
ClinicalTrials.gov processed this data on August 20, 2015
Link to the current ClinicalTrials.gov record.

Condition(s) targeted: Behcet's Syndrome

Intervention: Colchicine (Drug); Placebo (Drug)

Phase: Phase 2

Status: Completed

Sponsored by: Tehran University of Medical Sciences

Official(s) and/or principal investigator(s):
Fereydoun Davatchi, Professor, Study Chair, Affiliation: Rheumatology Research Center, Tehran University for Medical Sciences
Bahar Sadeghi, MD, Principal Investigator, Affiliation: Rheumatology research Center, Tehran University for Medical Sciences
Arash Tehrani Banihashemi, MD, MPH, Principal Investigator, Affiliation: Rheumatology Research Center, Tehran University for Mrdical Sciences
Farhad Shahram, Professor, Principal Investigator, Affiliation: Rheumatology Research Center, Tehran University for Medical Sciences


Colchicine was first used in Behcet's Disease (BD), in 1977. There are controversial reports of the efficacy of Colchicine in BD. For some experts the unresponsiveness of some patients could be explained by genetic difference between the Silk Road BD and sporadic BD from other parts of the world. To test this hypothesis (the inefficacy of colchicine in the Silk Road BD), we designed a randomized double-blind controlled crossover study in Iran, which is in the middle of the Silk Road, and has the second highest prevalence of BD in the world.

Clinical Details

Official title: A Double Blind Cross Over Clinical Trial to Determine Colchicine Efficacy in Behcet`s Disease

Study design: Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Crossover Assignment, Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor), Primary Purpose: Treatment

Primary outcome: Iranian Behcet's Disease Dynamic Activity Measurement (IBDDAM)

Secondary outcome:

Oral Aphthosis

Genital Aphthosis


Erythem Nodusom

Joint Manifestations

Detailed description: Patients: They were selected as consecutive patients. The entry criteria was: age between 14 and 60 years, confirmed diagnosis of Behcet's Disease, absence of major organ involvement (eye, brain, lung, and cardio-vascular involvement), having at least one active symptom, and no treatment for at least one month. Patients were explained the study design and they gave a signed written consent. During the two phases of study, if a major organ involvement appeared, the patient was moved out of the study. All patients fulfilled the new International Criteria for Behcet's Disease. Method: patients were randomized at the study entry to take either colchicine or placebo. At 4 months, they were crossed over. Those who were taking colchicine went on placebo and those on placebo went on colchicine. Each patient tried therefore, both colchicine and placebo. The primary outcome was the effect of colchicine on the disease activity index, the IBDDAM (16-17). To calculate the overall IBDDAM of the baseline, the IBDDAM of the last 12 months (prior to the study) of each manifestation was calculated and added together. The overall disease activity index was then divided to the number of months (12 months) to have the mean activity index per month. IBDDAM was then measured every 2 months (in the middle and at the end, in each arm of the study). The total IBBDAM of the 4 months was then divided by 4 to have the mean activity index per month. The secondary outcome was to see how the individual symptoms responded to colchicine (IBDDAM of each manifestation). Statistical analysis: The analysis was done by the intention to treat method. As the difference between IBDDAM before and after treatment had normal distribution Student T test for paired samples were used to evaluate the outcome in the colchicine and the placebo group. As the Levene's test showed the homogeneity of variance, ANOVA (one way) was used to test the effect of treatment (colchicine and placebo) and gender on patients' outcome. The dependent variable was the difference between IBDDAM (before and after the treatment). The independent variables were the treatment, and the gender. SPSS 15 was used for all statistical calculations.


Minimum age: 14 Years. Maximum age: 60 Years. Gender(s): Both.


Inclusion Criteria:

- Patient's who fulfilled the International Criteria for Behcet's Disease.

Exclusion Criteria:

- major organ involvement

- Hypersensitivity reaction

Locations and Contacts

Rheumatology research Center, Tehran UMS, Tehran 14114, Iran, Islamic Republic of
Additional Information

Starting date: August 2002
Last updated: June 17, 2008

Page last updated: August 20, 2015

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