No Effect of Levothyroxine on Hemoglobin in Older Adults With Subclinical Hypothyroidism: Pooled Results From 2 Randomized Controlled Trials
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No Effect of Levothyroxine on Hemoglobin in Older Adults With Subclinical Hypothyroidism : Pooled Results From 2 Randomized Controlled Trials. / Du Puy, Robert S.; Poortvliet, Rosalinde K. E.; Mooijaart, Simon P.; Stott, David J.; Quinn, Terry; Sattar, Naveed; Westendorp, Rudi G. J.; Kearney, Patricia M.; McCarthy, Vera J. C.; Byrne, Stephen; Rodondi, Nicolas; Baretella, Oliver; Collet, Tinh-Hai; van Heemst, Diana; Dekkers, Olaf M.; Jukema, J. Wouter; Smit, Johannes W. A.; Gussekloo, Jacobijn; den Elzen, Wendy P. J.
I: Journal of Clinical Endocrinology & Metabolism, Bind 107, 2022, s. e2339–e2347.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - No Effect of Levothyroxine on Hemoglobin in Older Adults With Subclinical Hypothyroidism
T2 - Pooled Results From 2 Randomized Controlled Trials
AU - Du Puy, Robert S.
AU - Poortvliet, Rosalinde K. E.
AU - Mooijaart, Simon P.
AU - Stott, David J.
AU - Quinn, Terry
AU - Sattar, Naveed
AU - Westendorp, Rudi G. J.
AU - Kearney, Patricia M.
AU - McCarthy, Vera J. C.
AU - Byrne, Stephen
AU - Rodondi, Nicolas
AU - Baretella, Oliver
AU - Collet, Tinh-Hai
AU - van Heemst, Diana
AU - Dekkers, Olaf M.
AU - Jukema, J. Wouter
AU - Smit, Johannes W. A.
AU - Gussekloo, Jacobijn
AU - den Elzen, Wendy P. J.
PY - 2022
Y1 - 2022
N2 - Context Subclinical thyroid dysfunction and anemia are common disorders, and both have increasing prevalence with advancing age. Objective The aim of this study was to assess whether levothyroxine treatment leads to a rise in hemoglobin levels in older persons with subclinical hypothyroidism. Methods This preplanned combined analysis of 2 randomized controlled trials included community-dwelling persons aged 65 years and older with subclinical hypothyroidism who were randomly assigned to levothyroxine or placebo treatment. The levothyroxine dose was periodically titrated aiming at thyroid stimulating hormone (TSH) level within the reference range, with mock titrations in the placebo group. The main outcome measure was the change in hemoglobin level after 12 months. Results Analyses included 669 participants (placebo n = 337, levothyroxine n = 332) with a median age of 75 years (range, 65-97) and mean baseline hemoglobin of 13.8 +/- 1.3 g/dL. Although levothyroxine treatment resulted in a reduction in TSH from baseline after 12 months of follow-up compared with placebo, the change in hemoglobin level was not different between the levothyroxine and the placebo groups (-0.03 g/dL [95% CI, -0.16 to 0.11]). Similar results were found in stratified analyses including sex, age, or TSH levels. No difference in change of hemoglobin levels after 12 months was identified in 69 participants with anemia at baseline (-0.33 g/dL [95% CI, -0.87 to 0.21]). Conclusion In persons aged 65 years and older with subclinical hypothyroidism, treatment with levothyroxine does not lead to a rise in hemoglobin levels, regardless of the presence of anemia.
AB - Context Subclinical thyroid dysfunction and anemia are common disorders, and both have increasing prevalence with advancing age. Objective The aim of this study was to assess whether levothyroxine treatment leads to a rise in hemoglobin levels in older persons with subclinical hypothyroidism. Methods This preplanned combined analysis of 2 randomized controlled trials included community-dwelling persons aged 65 years and older with subclinical hypothyroidism who were randomly assigned to levothyroxine or placebo treatment. The levothyroxine dose was periodically titrated aiming at thyroid stimulating hormone (TSH) level within the reference range, with mock titrations in the placebo group. The main outcome measure was the change in hemoglobin level after 12 months. Results Analyses included 669 participants (placebo n = 337, levothyroxine n = 332) with a median age of 75 years (range, 65-97) and mean baseline hemoglobin of 13.8 +/- 1.3 g/dL. Although levothyroxine treatment resulted in a reduction in TSH from baseline after 12 months of follow-up compared with placebo, the change in hemoglobin level was not different between the levothyroxine and the placebo groups (-0.03 g/dL [95% CI, -0.16 to 0.11]). Similar results were found in stratified analyses including sex, age, or TSH levels. No difference in change of hemoglobin levels after 12 months was identified in 69 participants with anemia at baseline (-0.33 g/dL [95% CI, -0.87 to 0.21]). Conclusion In persons aged 65 years and older with subclinical hypothyroidism, treatment with levothyroxine does not lead to a rise in hemoglobin levels, regardless of the presence of anemia.
KW - thyroid
KW - anemia
KW - RCT
KW - subclinical hypothyroidism
KW - older adults
KW - THYROID-DYSFUNCTION
KW - ANEMIA
KW - ERYTHROPOIESIS
KW - HORMONES
KW - RISK
U2 - 10.1210/clinem/dgac106
DO - 10.1210/clinem/dgac106
M3 - Journal article
C2 - 35218666
VL - 107
SP - e2339–e2347
JO - Journal of Clinical Endocrinology and Metabolism
JF - Journal of Clinical Endocrinology and Metabolism
SN - 0021-972X
ER -
ID: 301626802