AndersenS, PedersenK, BruunN, al. Narrow individual variations in serum T-4 and T-3 in normal subjects: A clue to the understanding of subclinical thyroid disease. J Clin Endocrinol Metab, 2002; 87(3):1068–1072; doi: 10.1210/jcem.87.3.8165
2.
FitzgeraldSP, BeanNG, FalhammarH, et al.Physiological linkage of thyroid and pituitary sensitivities. Endocrine, 2023; 79(1):143–151; doi: 10.1007/s12020-022-03184-8
3.
HoermannR, MidgleyJE, LarischR, et al.Relational stability of thyroid hormones in euthyroid subjects and patients with autoimmune thyroid disease. Eur Thyroid J, 2016; 5(3):171–179; doi: 10.1159/000447967
4.
EhrenkranzJ, BachPR, SnowGL, et al.Circadian and circannual rhythms in thyroid hormones: Determining the TSH and Free T4 reference intervals based upon time of day, age, and sex. Thyroid, 2015; 25(8):954–961; doi: 10.1089/thy.2014.0589
5.
RossDS. Treating hypothyroidism is not always easy: When to treat subclinical hypothyroidism, TSH goals in the elderly, and alternatives to levothyroxine monotherapy. J Intern Med, 2022:291(2):128–140; doi: 10.1111/joim.13410
6.
MammenJS, Unstable thyroid function in older adults is caused by alterations in both thyroid and pituitary physiology and is associated with increased mortality. Thyroid, 2017; 27(11):1370–1377; doi: 10.1089/thy.2017.0211
7.
CarléA, PedersenIB, KnudsenN, et al.Hypothyroid symptoms fail to predict thyroid insufficiency in old people: A population-based case-control study. Am J Med, 2016; 129:1082–1092.
8.
YamadaS, HoriguchiK, AkuzawaM, et al.The impact of age- and sex-specific reference ranges for serum thyrotropin and free thyroxine on the diagnosis of subclinical thyroid dysfunction: A multicenter study from Japan. Thyroid, 2023; 33(4):428–439; doi: 10.1089/thy.2022.0567
9.
TolozaFJK, El KawkgiOM, SpencerHJ, et al.Determinants for thyroid hormone replacement therapy in subclinical hypothyroidism: A multicenter electronic health records-based study. Thyroid, 2023; 26; doi: 10.1089/thy.2023.0062