Valdés, SergioMaldonado-Araque, CristinaLago-Sampedro, AnaLillo-Muñoz, Juan AntonioGarcia-Fuentes, EduardoPerez-Valero, VidalGutiérrez-Repiso, CarolinaGarcia-Escobar, EvaGoday, AlbertUrrutia, InésPeláez, LauraCalle-Pascual, AlfonsoBordiú, ElenaCastaño, LuisCastell, ConxaDelgado, EliasMenéndez, EdelmiroFranch-Nadal, JosepGaztambide, SoniaGirbés, JoanOrtega, EmilioVendrell, JoanChacón, Matilde RJavier Chaves, FSoriguer, FedericoRojo-Martínez, Gemma2023-01-252023-01-252017-03-09http://hdl.handle.net/10668/10947To analyze the reference range of thyroid-stimulating hormone (TSH) in different BMI categories and its impact on the classification of hypothyroidism. The study included 3,928 individuals free of thyroid disease (without previous thyroid disease, no interfering medications, TSH The reference range (p2.5-97.5) for TSH was estimated as 0.6 to 4.8 µUI/mL in the underweight category (BMI Persons with morbid obesity might be inappropriately classified if the standard ranges of normality of TSH for the normal-weight population are applied to them.enAdolescentAdultAgedAged, 80 and overAutoantibodiesCross-Sectional StudiesFemaleHumansHypothyroidismMaleMiddle AgedObesity, MorbidObserver VariationOverweightPrevalenceReference ValuesSpainThinnessThyroid Function TestsThyrotropinThyroxineTriiodothyronineYoung Adultresearch article28276648open access10.1002/oby.217961930-739Xhttps://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/oby.21796