Connection Between Vitamin D Level and the Efficacy of Dexamethasone in Immune Thrombocytopenia

Study Overview
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Brief Summary
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The project was undertaking by Qilu Hospital of Shandong University in China. The objective is to find out if there is a connection between vitamin D level and the efficacy of dexamethasone for the treatment of adults with newly-diagnosed primary immune thrombocytopenia (ITP).

Detailed Description
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The investigators anticipate to undertaking a prospective, observational，non-randomized control trial of 60 ITP adult patients. Dexamethasone (given orally at a dose of 40 mg per day for 4 days, two-cycles with an interval of 10 days) will be used in the target patients. Vitamin D level will be detected before the utilization of treatment measures. Depend on the vitamin D level, the patients will be divided into 2 groups(higher vitamin D level group and lower vitamin D level group).Platelet count, bleeding and other symptoms were evaluated before and after treatment.

Official Title
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A Prospective Observational Study: Connection Between Vitamin D Level and the Efficacy of Dexamethasone in Immune Thrombocytopenia

Conditions
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Immune Thrombocytopenia

Intervention / Treatment
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* Drug: Dexamethasone


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Corresponding to the diagnostic criteria for immune thrombocytopenia Newly diagnosed ITP patients To show a platelet count <30 * 10^9/L, and with bleeding manifestations Willing and able to sign written informed consent Exclusion Criteria: Received chemotherapy or anticoagulants or other drugs affecting the platelet counts within 3 months before the screening visit; Received second-line ITP-specific treatments (eg, cyclophosphamide, 6-mercaptopurine, vincristine, vinblastine, etc) within 3 months before the screening visit; Received high-dose steroids or IVIG in the 3 weeks prior to the start of the study; Current HIV infection; Severe medical condition (lung, hepatic or renal disorder) other than chronic ITP. Unstable or uncontrolled disease or condition related to or impacting cardiac function (e.g., unstable angina, congestive heart failure, uncontrolled hypertension or cardiac arrhythmia) Female patients who are nursing or pregnant, who may be pregnant, or who contemplate pregnancy during the study period; Have a known diagnosis of other autoimmune diseases, established in the medical history and laboratory findings with positive results for the determination of antinuclear antibodies, anti-cardiolipin antibodies, lupus anticoagulant or direct Coombs test; Patients who are deemed unsuitable for the study by the investigator.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 80 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Lower vitamin D level group<br>The vitamin D level is lower than 20 nmol/L. | Drug: Dexamethasone<br>* HD-DXM (orally at 40 mg daily for 4d )<br>|
| Higher vitamin D level group<br>The vitamin D level is higher than 20 nmol/L. | Drug: Dexamethasone<br>* HD-DXM (orally at 40 mg daily for 4d )<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Sustained response to ITP treatments | Percentage of patients maintaining PLT count over 30*10^9/L without bleeding | 3 months after treatment started |