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Subclinical hypothyroidism (SCH), cardiovascular risk and quality of life
ISRCTN ISRCTN35570362
ClinicalTrials.gov identifier
Public title Subclinical hypothyroidism (SCH), cardiovascular risk and quality of life
Scientific title
Acronym N/A
Serial number at source 199/MED
Study hypothesis The cardiovascular risk in people with SCH, health status and quality of life can be improved by treatment with L-thyroxine.
Lay summary
Ethics approval Not provided at time of registration
Study design Double blind randomised controlled crossover study
Countries of recruitment United Kingdom
Disease/condition/study domain Subclinical hypothyroidism
Participants - inclusion criteria 1. Subjects from Primary Care (general practices)
2. Aged 18 to 80 years of age
3. Who have at least two abnormal thyroid function tests
Participants - exclusion criteria 1. Thyroid disease and its treatment
2. Medications that could cause thyroid hormone dysfunction
3. Diabetes mellitus
4. Renal failure (serum creatinine greater than 120 µmol/l)
5. Vascular disease
6. Psychiatric conditions or its treatment
7. Current or previous pregnancy in the last two years
Anticipated start date 01/02/2003
Anticipated end date 10/01/2005
Status of trial Completed
Patient information material
Target number of participants 100
Interventions Double blind randomised controlled crossover study using thyroxine (100 mcg/day) versus placebo.
Primary outcome measure(s) Improvement in brachial artery Flow Mediated Dilatation (FMD) as a marker of vascular endothelial function and Total Cholesterol (TC) levels, after 12 weeks of L-thyroxine treatment.
Secondary outcome measure(s) Changes in:
1. Health status
2. Quality of life
3. Weight as assessed by body mass index
4. Waist circumference and waist hip ratio
5. Blood pressure
6. Triglyceride
7. High Density Lipoprotein (HDL) cholesterol
8. Low Density Lipoprotein (LDL) cholesterol
9. Apolipoprotein A1 and apolipoprotein B
10. Serum markers of endothelial function (e-selectin, soluble adhesion molecule 1, tissue plasminogen activator and plasminogen activator inhibitor 1) and markers of inflammation high sensitive C-reactive protein
Sources of funding 1. NHS Research and Development (UK)
2. Research Endocrine Fund (UK)
3. Gateshead Diabetes Charitable Fund (UK)
Trial website
Publications For information:
Health status in patients with sub-clinical hypothyroidism. Razvi S, Ingoe LE, McMillan CV, Weaver JU Eur J Endocrinol. 2005;152:713-7.
See http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=pubmed&dopt=Abstract&list_uids=15879356

For results:
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=retrieve&db=pubmed&list_uids=17299073
Contact name Dr  Jolanta  Weaver
  Address Queen Elizabeth Hospital
Sheriff Hill
  City/town Gateshead
  Zip/Postcode NE9 6SX
  Country United Kingdom
Sponsor Gateshead Health NHS Foundation Trust (UK)
  Address Queen Elizabeth Hospital
Sheriff Hill
Tyne and Wear
  City/town Gateshead
  Zip/Postcode NE9 6SX
  Country United Kingdom
  Sponsor website: http://www.gatesheadhealth.nhs.uk/
Date applied 19/09/2005
Last edited 09/05/2007
Date ISRCTN assigned 19/10/2005
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