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Low thyroid function is not associated with an accelerated deterioration in renal function.

TitleLow thyroid function is not associated with an accelerated deterioration in renal function.
Publication TypeJournal Article
Year of Publication2018
AuthorsMeuwese, CL, van Diepen, M, Cappola, AR, Sarnak, MJ, Shlipak, MG, Bauer, DC, Fried, LP, Iacoviello, M, Vaes, B, Degryse, J, Khaw, K-T, Luben, RN, Asvold, BO, Bjøro, T, Vatten, LJ, de Craen, AJM, Trompet, S, Iervasi, G, Molinaro, S, Ceresini, G, Ferrucci, L, Dullaart, RPF, Bakker, SJL, J Jukema, W, Kearney, PM, Stott, DJ, Peeters, RP, Franco, OH, Völzke, H, Walsh, JP, Bremner, A, Sgarbi, JA, Maciel, RMB, Imaizumi, M, Ohishi, W, Dekker, FW, Rodondi, N, Gussekloo, J, Elzen, WPJ den
Corporate/Institutional AuthorsThyroid Studies Collaboration,
JournalNephrol Dial Transplant
Date Published2018 Apr 18
ISSN1460-2385
Abstract<p><b>Background: </b>Chronic kidney disease (CKD) is frequently accompanied by thyroid hormone dysfunction. It is currently unclear whether these alterations are the cause or consequence of CKD. This study aimed at studying the effect of thyroid hormone alterations on renal function in cross-sectional and longitudinal analyses in individuals from all adult age groups.</p><p><b>Methods: </b>Individual participant data (IPD) from 16 independent cohorts having measured thyroid stimulating hormone, free thyroxine levels and creatinine levels were included. Thyroid hormone status was defined using clinical cut-off values. Estimated glomerular filtration rates (eGFR) were calculated by means of the four-variable Modification of Diet in Renal Disease (MDRD) formula. For this IPD meta-analysis, eGFR at baseline and eGFR change during follow-up were computed by fitting linear regression models and linear mixed models in each cohort separately. Effect estimates were pooled using random effects models.</p><p><b>Results: </b>A total of 72 856 individuals from 16 different cohorts were included. At baseline, individuals with overt hypothyroidism (n = 704) and subclinical hypothyroidism (n = 3356) had a average (95% confidence interval) -4.07 (-6.37 to -1.78) and -2.40 (-3.78 to -1.02) mL/min/1.73 m2 lower eGFR as compared with euthyroid subjects (n = 66 542). In (subclinical) hyperthyroid subjects (n = 2254), average eGFR was 3.01 (1.50-4.52) mL/min/1.73 m2 higher. During 329 713 patient years of follow-up, eGFR did not decline more rapidly in individuals with low thyroid function compared with individuals with normal thyroid function.</p><p><b>Conclusions: </b>Low thyroid function is not associated with a deterioration of renal function. The cross-sectional association may be explained by renal dysfunction causing thyroid hormone alterations.</p>
DOI10.1093/ndt/gfy071
Alternate JournalNephrol. Dial. Transplant.
PubMed ID29684213
ePub date: 
18/04