Early Levothyroxine Post Radioactive Iodine
Prevention of Overt Hypothyroidism Following Radioactive Iodine Therapy for Graves' Disease
Studieoversigt
Status
Status
Betingelser
Betingelser
Intervention / Behandling
Intervention / Behandling
Undersøgelsestype
Undersøgelsestype
Tilmelding (Faktiske)
Tilmelding
Fase
Fase
- Fase 2
- Fase 3
Kontakter og lokationer
Studiesteder
-
-
Minnesota
-
Rochester, Minnesota, Forenede Stater, 55905
- Mayo Clinic in Rochester
-
-
Deltagelseskriterier
Berettigelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
Tager imod sunde frivillige
Køn, der er berettiget til at studere
Beskrivelse
Inclusion criteria:
-all adult patients (ages 18-70 years) with Graves' Disease (GD) who will receive radioactive iodine (RAI) ablation of the thyroid gland for treatment of GD
Exclusion criteria:
- clinically manifest Graves' ophthalmopathy (GO)
- recent (<1 yr.) history of arrhythmias or any history of ventricular arrhythmias
- preexistent cardiomyopathy
- malnutrition
- psychiatric history that could get worse if patient remains persistently hyperthyroid
- unlikely to return for the planned follow-up visits
- unlikely to comply with the blood drawing schedule
- unlikely to complete the hypothyroid-Health Related Quality of Life (HDQL) and Thyroid Specific (TSQ) questionnaires
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Forebyggelse
- Tildeling: Randomiseret
- Interventionel model: Parallel tildeling
- Maskning: Firedobbelt
Antal våben
Våben og indgreb
Deltagergruppe / ArmDeltagergruppe / Arm |
Intervention / BehandlingIntervention / Behandling |
|---|---|
|
Eksperimentel: Levothyroxine
In the intervention arm patients will start levothyroxine therapy at 4 weeks after RAI therapy.
The initial dose of levothyroxine will be 25 mcg/day.
It will be increased to 50 mcg/day 2 weeks later and then adjusted at 8 weeks post RAI based on a full face-to-face clinical and biochemical evaluation.
|
Early initiation of levothyroxine after radioactive iodine (to start at 4 weeks).
Andre navne:
|
|
Placebo komparator: Placebo
In the control arm patients will receive placebo capsules and be evaluated for levothyroxine therapy during a full face-to-face evaluation at 8 weeks.
|
Placebo to start at 4 weeks after RAI
|
Hvad måler undersøgelsen?
Primære resultatmål
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
Number of Participants With Overt Hypothyroidism
Tidsramme: 8 weeks
|
Incidence of overt hypothyroidism at 8 weeks post radioactive iodine treatment (RAI).
Overt hypothyroidism was defined as thyroid stimulating hormone (TSH) test result > 3.0 milliunits per liter (mIU/L) or thyroid hormone free T4 (fT4) < 0.8 nanograms per deciliter (ng/dL).
Free T4 is the portion of total T4 thyroid hormone that is available to your tissues in your bloodstream.
|
8 weeks
|
Sekundære resultatmål
Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
Change in Hypothyroid-Health Related Quality of Life
Tidsramme: 4 weeks, 8 weeks
|
The mean change in Quality of life scores was measured by the Hypothyroid-Health Related Quality of Life (HRQL) questionnaire.
This questionnaire consists of 27 questions specifying the severity of the discomfort or symptoms of hypothyroidism using a 5 point scale for each question with "not at all"=1 to "all the time"=5.
Higher scores are associated with a lower quality of life.
The change between weeks 4 and 8 were assessed using a hierarchical linear model.
The primary parameter of interest from the model was the treatment by time interaction term.
Time was a collection of indicator values representing each assessment point.
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4 weeks, 8 weeks
|
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Change in Thyroid Specific Quality of Life
Tidsramme: 4 weeks, 8 weeks
|
The mean change in quality of life scores was measured by the Thyroid Specific Questionnaire (TSQ).
This questionnaire consists of 12 questions ranked on a four-point scale for each question where 0 is 'better than usual' and 3 is 'much less than usual'.
A higher score indicates higher levels of dissatisfaction and a lower quality of life.
The change between weeks 4 and 8 were assessed using a hierarchical linear model.
The primary parameter of interest from the model was the treatment by time interaction term.
Time was a collection of indicator values representing each assessment point.
|
4 weeks, 8 weeks
|
Samarbejdspartnere og efterforskere
Sponsor
Sponsor
Efterforskere
Efterforskere
- Ledende efterforsker: Marius Stan, MD, Mayo Clinic
Publikationer og nyttige links
Hjælpsomme links
Datoer for undersøgelser
Studer store datoer
Studiestart (Faktiske)
Studiestart
Primær færdiggørelse (Faktiske)
Primær færdiggørelse
Studieafslutning (Faktiske)
Studieafslutning
Datoer for studieregistrering
Først indsendt
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først indsendt, der opfyldte QC-kriterier
Først opslået (Skøn)
Først opslået
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Faktiske)
Sidste opdatering sendt
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Nøgleord
Yderligere relevante MeSH-vilkår
Andre undersøgelses-id-numre
Andre undersøgelses-id-numre
- 13-002570
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