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. 2022 Apr 11;32(4):368–375. doi: 10.1089/thy.2021.0512

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© Budour Alkaf et al., 2022; Published by Mary Ann Liebert, Inc.

This Open Access article is distributed under the terms of the Creative Commons License [CC-BY] (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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FIG. 1. — Monthly changes in TF in patients with treated primary hypothyroidism throughout a full year. Line graphs demonstrating monthly changes in median (A) TSH, (B) fT4, and (C) fT3 levels of 18,448 TF tests performed in patients with treated primary hypothyroidism throughout 2017. The 12 months (January–December) are labeled in the x-axis. The error bars represent the IQRs. In 2017, the month of Ramadan started on the 26th of May and ended on the 24th of June. For each month (January–December), the number of TF tests (n) were indicated. BR, before Ramadan; fT3, free triiodothyronine; fT4, free thyroxine; IQRs, interquartile range; TF, thyroid function; TSH, thyrotropin.