- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT03115515
Safety and Efficacy of Empiric Levothyroxine (LT4) Dose Increase Versus Individualized LT4 Dose Increase in Hypothyroid Women During Pregnancy
Randomized, Prospective Trial Comparing the Safety and Efficacy of Empiric Levothyroxine (LT4) Dose Increase Versus Individualized LT4 Dose Increase in Hypothyroid Women During Pregnancy
Study Overview
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Contacts and Locations
Study Locations
-
-
District of Columbia
-
Washington, District of Columbia, United States, 20010
- MedStar Washington Hospital Center
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Female between ages of 18-45 who takes thyroid hormone replacement medicine AND pregnant or plan to become pregnant in the near future.
Exclusion Criteria:
- Males
- Younger than 18 or older than 45 years old
- More than 10 weeks pregnant at enrollment
- Iodine deficient
- Pregnant with more than one baby (i.e., twins, triplets, etc.)
- NOT taking thyroid hormone medicine before becoming pregnant
- Levels of thyroid hormone in blood have been too low or too high in the past 6 months
- Treated with radioactive iodine in the past year.
Study Plan
How is the study designed?
Design Details
- Primary Purpose: TREATMENT
- Allocation: RANDOMIZED
- Interventional Model: PARALLEL
- Masking: NONE
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
EXPERIMENTAL: Adjustment in number of doses of thyroid hormone per week
Patients in this group will increase pre-pregnancy thyroid hormone dose by 2 doses/week (extra dose on Wednesday and Saturday). Further dose adjustment are made every 2-4 weeks based on serum TSH, as shown below:
|
To compare two different methods of adjusting thyroid hormone replacement during pregnancy to maintain TSH within the normal reference range for pregnancy.
Other Names:
|
EXPERIMENTAL: Adjustment in micrograms per day of thyroid hormone
Patients in this group adjust thyroid hormone dose based on Visit 1 TSH and pre-pregnancy thyroid hormone dose. Further dose adjustments are made every 2-4 weeks based on serum TSH, as shown below:
|
To compare two different methods of adjusting thyroid hormone replacement during pregnancy to maintain TSH within the normal reference range for pregnancy.
Other Names:
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
% of TSH values within trimester-specific goal range per patient from study enrollment to delivery
Time Frame: TSH will be assessed every 2 weeks from enrollment to 28 weeks gestation and then every 4 weeks from 29 weeks to delivery
|
% of TSH values within trimester-specific goal range according to study group
|
TSH will be assessed every 2 weeks from enrollment to 28 weeks gestation and then every 4 weeks from 29 weeks to delivery
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Mean number of LT4 dose adjustment
Time Frame: Dose adjustments will be assessed every 2 weeks from enrollment to 28 weeks gestation and then every 4 weeks from 29 weeks to delivery
|
Mean number of LT4 dose adjustments needed per patient in each group
|
Dose adjustments will be assessed every 2 weeks from enrollment to 28 weeks gestation and then every 4 weeks from 29 weeks to delivery
|
Mean number of LT4 dose adjustments by hypothyroidism etiology
Time Frame: Dose adjustments will be assessed every 2 weeks from enrollment to 28 weeks gestation and then every 4 weeks from 29 weeks to delivery
|
Mean number of LT4 dose adjustments needed according to etiology of hypothyroidism in each group
|
Dose adjustments will be assessed every 2 weeks from enrollment to 28 weeks gestation and then every 4 weeks from 29 weeks to delivery
|
% of TSH values at goal according to anti-thyroid antibody status
Time Frame: TSH will be assessed every 2 weeks from enrollment to 28 weeks gestation and then every 4 weeks from 29 weeks to delivery
|
TSH values within trimester specific goal range according to anti-thyroid antibody status
|
TSH will be assessed every 2 weeks from enrollment to 28 weeks gestation and then every 4 weeks from 29 weeks to delivery
|
Collaborators and Investigators
Publications and helpful links
Study record dates
Study Major Dates
Study Start
Primary Completion (ACTUAL)
Study Completion (ACTUAL)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (ACTUAL)
Study Record Updates
Last Update Posted (ACTUAL)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- 2011-235
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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