Journal
JOURNAL OF CLINICAL ENDOCRINOLOGY & METABOLISM
Volume 91, Issue 3, Pages 878-884Publisher
ENDOCRINE SOC
DOI: 10.1210/jc.2005-2064
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Funding
- NIDDK NIH HHS [T32DK62707] Funding Source: Medline
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Context: Thyroid carcinoma requires lifelong monitoring with serum thyroglobulin, radioactive iodine whole body scanning, and other imaging modalities. Levothyroxine (L-T-4) withdrawal for thyroglobulin measurement and whole body scanning increases these tests' sensitivities but causes hypothyroidism. Recombinant human TSH (rhTSH) enables testing without L-T-4 withdrawal. Objective: Our objective was to examine the impact of short-term hypothyroidism on the health-related quality of life (HRQOL) of patients after rhTSH vs. L-T-4 withdrawal. Design, Setting, and Patients: In this multicenter study, the SF-36 Health Survey was administered to 228 patients at three time points: on L-T-4, after rhTSH, and after L-T-4 withdrawal. Interventions: Interventions included administration of rhTSH on L-T-4 and withdrawal from thyroid hormone. Main Outcome Measures: Mean SF-36 scores were compared during the two interventions and with the U. S. general population and patients with heart failure, depression, and migraine headache. Results: Patients had SF-36 scores at or above the norm for the general U. S. population in six of eight domains at baseline on L-T4 and in seven of eight domains after rhTSH. Patients' scores declined significantly in all eight domains after L-T-4 withdrawal when compared with the other two periods (P<0.0001). Patients' HRQOL scores while on L-T-4 and after rhTSH were at or above those for patients with heart failure, depression, and migraine in all eight domains. After L-T-4 withdrawal, patients' HRQOL scores were significantly below congestive heart failure, depression, and migraine headache norms in six, three, and six of the eight domains, respectively. Conclusions: Short-term hypothyroidism after L-T-4 withdrawal is associated with a significant decline in quality of life that is abrogated by rhTSH use.
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