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Effects of antithyroid drugs on radioiodine treatment: systematic review and meta-analysis of randomised controlled trials.

AbstractOBJECTIVE:
To determine the effect of adjunctive antithyroid drugs on the risk of treatment failure, hypothyroidism, and adverse events after radioiodine treatment.
DESIGN:
Meta-analysis.
DATA SOURCES:
Electronic databases (Cochrane central register of controlled trials, Medline, Embase) searched to August 2006 and contact with experts. Review methods Three reviewers independently assessed trial eligibility and quality. Pooled relative risks for treatment failure and hypothyroidism after radioiodine treatment with and without adjunctive antithyroid drugs were calculated with a random effects model.
RESULTS:
We identified 14 relevant randomised controlled trials with a total of 1306 participants. Adjunctive antithyroid medication was associated with an increased risk of treatment failure (relative risk 1.28, 95% confidence interval 1.07 to 1.52; P=0.006) and a reduced risk for hypothyroidism (0.68, 0.53 to 0.87; P=0.006) after radioiodine treatment. We found no difference in summary estimates for the different antithyroid drugs or for whether antithyroid drugs were given before or after radioiodine treatment.
CONCLUSIONS:
Antithyroid drugs potentially increase rates of failure and reduce rates of hypothyroidism if they are given in the week before or after radioiodine treatment, respectively.
AuthorsMartin A Walter, Matthias Briel, Mirjam Christ-Crain, Steen J Bonnema, John Connell, David S Cooper, Heiner C Bucher, Jan Müller-Brand, Beat Müller
JournalBMJ (Clinical research ed.) (BMJ) Vol. 334 Issue 7592 Pg. 514 (Mar 10 2007) ISSN: 1756-1833 [Electronic] England
PMID17309884 (Publication Type: Journal Article, Meta-Analysis, Research Support, Non-U.S. Gov't, Systematic Review, Technical Report)
Chemical References
  • Antithyroid Agents
  • Iodine Radioisotopes
Topics
  • Antithyroid Agents (therapeutic use)
  • Humans
  • Hyperthyroidism (drug therapy, radiotherapy)
  • Hypothyroidism (etiology, prevention & control)
  • Iodine Radioisotopes (therapeutic use)
  • Randomized Controlled Trials as Topic
  • Risk Factors
  • Treatment Failure

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