PT - JOURNAL ARTICLE AU - Rolake Kuye AU - Catherine Riggs AU - Jordan King AU - Rachel Heilmann AU - Deanna Kurz AU - Jessica Milchak TI - Thyroid Stimulating Hormone Stability in Patients Prescribed Synthetic or Desiccated Thyroid Products: A Retrospective Study AID - 10.1370/afm.2545 DP - 2020 Sep 01 TA - The Annals of Family Medicine PG - 452--454 VI - 18 IP - 5 4099 - http://www.annfammed.org/content/18/5/452.short 4100 - http://www.annfammed.org/content/18/5/452.full SO - Ann Fam Med2020 Sep 01; 18 AB - The purpose of this retrospective matched-cohort study was to evaluate the stability of thyroid stimulating hormone (TSH) in patients using synthetic compared with desiccated thyroid products. Patients using a thyroid product for the treatment of hypothyroidism were matched 1:1 on age, sex, race/ethnicity, and had a follow-up period of 3 years after the index date. The primary outcome was percent of in-range TSH values. Over 3 years, TSH values in both groups were in-range 79% of the time (P = 0.905). Our results showed no difference in longitudinal TSH stability between desiccated thyroid products and synthetic levothyroxine.