[1] Chan, A.O., Iu, Y.P., Shek, C.C. The reference interval of thyroid-stimulating hormone in Hong Kong Chinese. J Clin Pathol. 2011; 645: 433-436.
[2] Baskin, H.J., Cobin, R.H., Duick, D.S., Gharib, H., Guttler, R.B., Kaplan, M.M., et al. American Association of Clinical Endocrinologists medical guidelines for clinical practice for the evaluation and treatment of hyperthyroidism and hypothyroidism. Endocr Pract. 2002; 86: 457-469.
[3] Odhiambo, C., Oyaro, B., Odipo, R., Otieno, F., Alemnji, G., Williamson, J., et al. Evaluation of locally established reference intervals for hematology and biochemistry parameters in Western Kenya. PLoS One. 2015; 104: e0123140.
[4] Guan, H., Shan, Z., Teng, X., Li, Y., Teng, D., Jin, Y., et al. Influence of iodine on the reference interval of TSH and the optimal interval of TSH: results of a follow-up study in areas with different iodine intakes. Clin Endocrinol (Oxf). 2008; 691: 136-141.
[5] Sriphrapradang, C., Pavarangkoon, S., Jongjaroenprasert, W., Chailurkit, L.O., Ongphiphadhanakul, B., Aekplakorn, W. Reference ranges of serum TSH, FT4 and thyroid autoantibodies in the Thai population: the national health examination survey. Clin Endocrinol (Oxf). 2014; 805: 751-756.
[6] Raman Kumar Marwahaa, Nikhil Tandonc, Mohd Ashraf Ganiee, Neena Mehanc, d., Aparna Sastrya, M.K. Gargb, et al. Reference range of thyroid function (FT3, FT4 and TSH) among Indian adults. Clinical Biochemistry. 2013; 46: 341-345.
[7] Chenyan Li, Haixia Guan, Xiaochun Teng, Yaxin Lai, Yanyan Chen, Jiashu Yu, et al. An epidemiological study of the serum thyrotropin reference range and factors that influence serum thyrotropin levels in iodine sufficient areas of China. Endocrine Journal. 2011; 5811: 995-1002.
[8] Park, S.Y., Kim, H.I., Oh, H.K., Kim, T.H., Jang, H.W., Chung, J.H., et al. Age- and gender-specific reference intervals of TSH and free T4 in an iodine-replete area: Data from Korean National Health and Nutrition Examination Survey IV (2013-2015). PLoS One. 2018; 132: e0190738.
[9] Chaker, L., Korevaar, T.I., Medici, M., Uitterlinden, A.G., Hofman, A., Dehghan, A., et al. Thyroid Function Characteristics and Determinants: The Rotterdam Study. Thyroid. 2016; 269: 1195-1204.
[10] Sun, X., Shan, Z., Teng, W. Effects of increased iodine intake on thyroid disorders. Endocrinol Metab (Seoul). 2014; 293: 240-247.
[11] Kratzsch J, Fiedler GM, Leichtle A, al., e. New reference intervals for thyrotropin and thyroid hormones based on National Academy of Clinical Biochemistry criteria and regular ultrasonography of the thyroid. Clin Chem. 2005; 51: 1480-1486.
[12] Stang, A. Critical evaluation of the Newcastle-Ottawa scale for the assessment of the quality of nonrandomized studies in meta-analyses. Eur J Epidemiol. 2010; 259: 603-605.
[13] Ownby, R.L., Crocco, E., Acevedo, A., John, V., Loewenstein, D. Depression and risk for Alzheimer disease: systematic review, meta-analysis, and metaregression analysis. Arch Gen Psychiatry. 2006; 635: 530-538.
[14] Véronique Raverot, Maxime Bonjour, Juliette Abeillon du Payrat, Pauline Perrin, Florence Roucher-Boulez, Helene Lasolle, et al. Age- and Sex-Specific TSH Upper-Limit Reference Intervals in the General French Population: There Is a Need to Adjust Our Actual Practices. Journal of Clinical Medicine. 2020; doi:10.3390/jcm9030792.
[15] C., N., Hadlow, M., K., Rothacker, Robert Wardrop, Suzanne J. Brown, et al. The relationship between TSH and free T4 in a large population is complex, non-linear and differs by age and gender. J Clin Endocrin Metab. 2013 doi:10.1210/jc.2012-4223.
[16] Wang, P., Gao, Y.J., Cheng, J., Kong, G.L., Wang, Y., Wu, X.Y., et al. Serum thyroid hormone reference intervals in the apparently healthy individuals of Zhengzhou area of China. Genetics and molecular research : GMR. 2014; 133: 7275-7281.
[17] Inal, T.C., Serteser, M., Coskun, A., Ozpinar, A., Unsal, I. Indirect reference intervals estimated from hospitalized population for thyrotropin and free thyroxine. Croat Med J. 2010; 512: 124-130.
[18] Faruk Kutluturk, Beytullah Yildirim, Banu Ozturk, Huseyin Ozyurt, Ulku Bekar, Semsettin Sahin, et al. The reference intervals of thyroid stimulating hormone in healthy individuals with normal levels of serum free thyroxine and without sonographic pathologies. Endocrine research. 2014; 39(2): 57-61.
[19] Jang, Y.Y., Kim, C.Y., Hwang, T.Y., Kim, K.D., Lee, C.H. [Reference interval of serum thyroid hormones in healthy Korean adults]. J Prev Med Public Health. 2008; 412: 128-134.
[20] Lo Sasso, B., Vidali, M., Scazzone, C., Agnello, L., Ciaccio, M. Reference interval by the indirect approach of serum thyrotropin (TSH) in a Mediterranean adult population and the association with age and gender. Clin Chem Lab Med. 2019; 5710: 1587-1594.
[21] R., I., Musa, ., N., Ali, A., S., Elseed, et al. Reference intervals of thyroid hormones in Khartoum, Sudan. BMC Research Notes. 2018; 11: 729.
[22] Yoshihara, A., Noh, J.Y., Ohye, H., Sato, S., Sekiya, K., Kosuga, Y., et al. Reference limits for serum thyrotropin in a Japanese population. Endocr J. 2011; 587: 585-588.
[23] Chen, J., Zhou, W., Pan, F., Cui, W., Li, M., Hu, Y. Age-related change in thyroid-stimulating hormone: a cross-sectional study in healthy euthyroid population. Endocr J. 2018; 6511: 1075-1082.
[24] Amouzegar, A., Delshad, H., Mehran, L., Tohidi, M., Khafaji, F., Azizi, F. Reference limit of thyrotropin (TSH) and free thyroxine (FT4) in thyroperoxidase positive and negative subjects: a population based study. J Endocrinol Invest. 2013; 3611: 950-954.
[25] GAO Hai-feng, GE Jun-li, Wei., Z. Investigation on Biology Reference Intervals for Five Parameters of Thyroid Gland Function in Baoji Area. Journal of Modern Laboratory Medicine. 2014; 6: 121-123 (in Chinese).
[26] Wang Hao, Guangchao, Z. Investigation on normal reference range of serum thyroid-related hormones in adults in Hangzhou area. Modern Practical Medicine. 2011; 3: 322-324 (in Chinese).
[27] Wang Xinling, Chen Xiang, Xu Ziqi, Guo Yanying. Research on TSH Reference Interval of Normal Population in Urumqi Area. Labeled Immunoassays and Clinical Medicine. 2015; 22(9): 839-841,878 (in Chinese).
[28] Qiu Ling, Wang Danehen, Xu Tao, Cheng Xinqi, Sun Qi. Influence of gender, age and season on thyroid hormone reference interval. National Medical Journal of China. 2018; 20: 1582-1587 (in Chinese).
[29] SONG Xin, LIU Xiang-yi, WEN Jiang-ping, WAN Xiao-hua, Yong-jun, G. An initial investigation of the serum thyroid hormone reference range in the apparently healthy individuals of Beijing and Shanghai area of China. Chinese Journal of Laboratory Medicine. 2012; 2: 156-159 (in Chinese).
[30] Baloch, Z., Carayon, P., Conte-Devolx, B., Demers, L.M., Feldt-Rasmussen, U., Henry, J.F., et al. Laboratory medicine practice guidelines. Laboratory support for the diagnosis and monitoring of thyroid disease. Thyroid. 2003; 131: 3-126.
[31] Boucai, L., Hollowell, J.G., Surks, M.I. An approach for development of age-, gender-, and ethnicity-specific thyrotropin reference limits. Thyroid. 2011; 211: 5-11.
[32] Boucai L , MI, S. Reference limits of serum TSH and free T4 are signifi cantly infl uenced by race and age in an urban outpatient medical practice . Clin Endocrinol (Oxf). 2009; 70: 788-793.
[33] Surks MI, L, B. Age- and race-based serum thyrotropin reference limits . J Clin Endocrinol Metab. 2010; 95: 496 – 502.
[34] Spencer CA, Hollowell JG, Kazarosyan M, B., Le Blanc, E. National Health and Nutrition Examination Survey III thyroid-stimulating hormone (TSH)-thyroperoxidase antibody relationships demonstrate that TSH upper reference limits may be skewed by occult thyroid dysfunction. J Clin Endocrinol Metab. 2007; 92: 4236-4240.
[35] Walker, J.A., Illions, E.H., Huddleston, J.F., Smallridge, R.C. Racial comparisons of thyroid function and autoimmunity during pregnancy and the postpartum period. Obstet Gynecol. 2005; 1066: 1365-1371.
[36] Hollowell, J.G., Staehling, N.W., Flanders, W.D., Hannon, W.H., Gunter, E.W., Spencer, C.A., et al. Serum TSH, T(4), and thyroid antibodies in the United States population (1988 to 1994): National Health and Nutrition Examination Survey (NHANES III). J Clin Endocrinol Metab. 2002; 872: 489-499.
[37] Surks, M.I., Hollowell, J.G. Age-specific distribution of serum thyrotropin and antithyroid antibodies in the US population: implications for the prevalence of subclinical hypothyroidism. J Clin Endocrinol Metab. 2007; 9212: 4575-4582.
[38] Boelaert, K. Thyroid dysfunction in the elderly. Nature reviews. Endocrinology. 2013; 94: 194-204.
[39] Szkudlinski, M.W., Fremont, V., Ronin, C., Weintraub, B.D. Thyroid-stimulating hormone and thyroid-stimulating hormone receptor structure-function relationships. Physiol Rev. 2002; 822: 473-502.
[40] Tanda, M.L., Piantanida, E., Lai, A., Lombardi, V., Dalle Mule, I., Liparulo, L., et al. Thyroid autoimmunity and environment. Horm Metab Res. 2009; 416: 436-442.
[41] Zhai, X., Zhang, L., Chen, L., Lian, X., Liu, C., Shi, B., et al. An Age-Specific Serum Thyrotropin Reference Range for the Diagnosis of Thyroid Diseases in Older Adults: A Cross-Sectional Survey in China. Thyroid. 2018; 2812: 1571-1579.
[42] Tozzoli, R., D'Aurizio, F., Metus, P., Steffan, A., Mazzon, C., Bagnasco, M. Reference intervals for thyrotropin in an area of Northern Italy: the Pordenone thyroid study (TRIPP). J Endocrinol Invest. 2018; 418: 985-994.
[43] Clerico, A., Trenti, T., Aloe, R., Dittadi, R., Rizzardi, S., Migliardi, M., et al. A multicenter study for the evaluation of the reference interval for TSH in Italy (ELAS TSH Italian Study). Clin Chem Lab Med. 2018; 572: 259-267.
[44] Volzke, H., Schmidt, C.O., John, U., Wallaschofski, H., Dorr, M., Nauck, M. Reference levels for serum thyroid function tests of diagnostic and prognostic significance. Horm Metab Res. 2010; 4211: 809-814.
[45] van de Ven AC, Netea-Maier RT, Smit JW, K.R., van der Stappen JW, CJ, P.-A. Thyrotropin versus age relation as an indicator of historical iodine intake. Thyroid. 2015; 201525: 629-634.
[46] Abdel-Dayem, M.M., Elgendy, M.S. Effects of chronic estradiol treatment on the thyroid gland structure and function of ovariectomized rats. BMC Res Notes. 2009; 2: 173.
[47] Kahapola-Arachchige KM, Hadlow N, W.R., LimEM, JP, W. Age-specific TSH reference ranges have minimal impact on the diagnosis of thyroid dysfunction. Clin Endocrinol (Oxf) 2012; 77: 773-779.
[48] V adiveloo T, Donnan PT, Murphy MJ, GP, L. Age- and gender-specific TSH reference intervals in people with no obvious thyroid disease in Tayside, Scotland: the Throid Epidemiology, Audit, and Research Study (TEARS). J Clin Endocrinol Metab. 2013; 98: 1147–1153.
[49] Bulow Pedersen, I., Knudsen, N., Jorgensen, T., Perrild, H., Ovesen, L., Laurberg, P. Large differences in incidences of overt hyper- and hypothyroidism associated with a small difference in iodine intake: a prospective comparative register-based population survey. J Clin Endocrinol Metab. 2002; 8710: 4462-4469.
[50] Kratzsch, J., Fiedler, G.M., Leichtle, A., Brugel, M., Buchbinder, S., Otto, L., et al. New reference intervals for thyrotropin and thyroid hormones based on National Academy of Clinical Biochemistry criteria and regular ultrasonography of the thyroid. Clin Chem. 2005; 518: 1480-1486.
[51] Knudsen, N., Bulow, I., Jorgensen, T., Laurberg, P., Ovesen, L., Perrild, H. Comparative study of thyroid function and types of thyroid dysfunction in two areas in Denmark with slightly different iodine status. Eur J Endocrinol. 2000; 1434: 485-491.
[52] Volzke, H., Alte, D., Kohlmann, T., Ludemann, J., Nauck, M., John, U., et al. Reference intervals of serum thyroid function tests in a previously iodine-deficient area. Thyroid. 2005; 153: 279-285.
[53] Schalin-Jäntti C, Tanner P , Välimäki MJ, E., H. Serum TSH reference interval in healthy Finnish adults using the Abbott Architect 2000i Analyzer. Scand J Clin Lab Invest. 2011; 71: 344-349.
[54] Y ang, F., T eng, W., Shan, Z., Guan, H., Li, Y., Jin, Y., et al. Epidemiological survey on the relationship between different iodine intakes and prevalence of hyperthyroidism. European Journal of Endocrinology. 2002; 146613–618:
[55] Cai J, Fang Y, Jing D, Xu S, Ming J, Gao B. Reference intervals of thyroid hormones in a previously iodine-deficient but presently more than adequate area of Western China: a population-based survey. Endocr J. 2016; 63: 381-388.
[56] Zimmermann, M.B., Andersson, M. Update on iodine status worldwide. Current opinion in endocrinology, diabetes, and obesity. 2012; 195: 382-387.
[57] Vadiveloo, T., Donnan, P.T., Murphy, M.J., Leese, G.P. Age- and gender-specific TSH reference intervals in people with no obvious thyroid disease in Tayside, Scotland: the Thyroid Epidemiology, Audit, and Research Study (TEARS). J Clin Endocrinol Metab. 2013; 983: 1147-1153.
[58] Boucai L, MI, S. Reference limits of serum TSH and free T4 are significantly influenced by race and age in an urban outpatient medical practice. Clin Endocrinol (Oxf) 2009; 70: 788-793.
[59] Surks, M.I., Boucai, L. Age- and race-based serum thyrotropin reference limits. J Clin Endocrinol Metab. 2010; 952: 496-502.
[60] Peeters, R.P., van Toor, H., Klootwijk, W., de Rijke, Y.B., Kuiper, G.G., Uitterlinden, A.G., et al. Polymorphisms in thyroid hormone pathway genes are associated with plasma TSH and iodothyronine levels in healthy subjects. J Clin Endocrinol Metab. 2003; 886: 2880-2888.