• Michael E Johansen, Julie P Marcinek, and Jonathan Doo Young Yun.
• From the Grant Family Medicine, OhioHealth, Columbus, OH (MEJ, JPM); Heritage College of Osteopathic Medicine, Ohio University, Columbus, OH (MEJ); Cecil G. Sheps Center for Health Services Research, University of North Carolina at Chapel Hill, Chapel Hill, NC (JY); Department of Family Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC (JY). mikejoha3@gmail.com.
• J Am Board Fam Med. 2020 Mar 1; 33 (2): 284-288.

BackgroundThyroid disorders are among the most commonly treated conditions by the United States health care system. The number of patients reporting thyroid hormone use has increased in recent years, but it is unknown if there have been differential increases in the number of treated individuals within different demographic groups. Previous research has also not evaluated how expenditures for different thyroid hormone medications have changed in recent years.MethodsUsing data from the 1997 through 2016 Medical Expenditure Panel Survey, we calculated the proportion of adults reporting thyroid hormone prescriptions by 3 demographic variables (age, sex, and race) and determined expenditures from thyroid hormone prescriptions by medication type (overall, generic, Synthroid or Cytomel, and other brand).ResultsBetween 1997 and 2016, the proportion of adults who reported thyroid hormone use increased from 4.1% (95% CI, 3.7-4.4) to 8.0% (95% CI, 7.5-8.5). Most of the growth in thyroid hormone use occurred among adults aged >65, and use was also more common among females and non-Hispanic whites. Expenditures from thyroid hormones increased from $1.1 billion (95% CI, 0.9-1.3) in 1997 to $3.2 billion dollars (95% CI, 2.9-3.6) in 2016. Generic thyroid hormone prescriptions comprised 18.1% of all thyroid hormone prescriptions in 2004 (95% CI, 15.8-20.4) and 80.8% of all thyroid hormone prescriptions (95% CI, 78.4-83.2) in 2016.ConclusionsThyroid hormone use nearly doubled over the last 20 years, and increased use was associated with being older, female, and non-Hispanic white. During the same time period, thyroid hormone expenditures almost tripled.© Copyright 2020 by the American Board of Family Medicine.

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