August 24, 2026 Thesis Open Access

BY: Dr. Worku Wegayehu (MD)

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  <identifier identifierType="DOI">10.20372/nadre:25793</identifier>
  <creators>
    <creator>
      <creatorName>BY: Dr. Worku Wegayehu (MD)</creatorName>
    </creator>
  </creators>
  <titles>
    <title>PREDICTORS OF TIME TO BIOCHEMICAL EUTHYROIDISM IN TOXIC GOITER PATIENTS TREATED WITH ANTI-THYROID DRUGS: A FIVE-YEAR RETROSPECTIVE COHORT STUDY</title>
  </titles>
  <publisher>Zenodo</publisher>
  <publicationYear>2026</publicationYear>
  <dates>
    <date dateType="Issued">2026-08-24</date>
  </dates>
  <resourceType resourceTypeGeneral="Text">Thesis</resourceType>
  <alternateIdentifiers>
    <alternateIdentifier alternateIdentifierType="url">https://nadre.ethernet.edu.et/record/25793</alternateIdentifier>
  </alternateIdentifiers>
  <relatedIdentifiers>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsVersionOf">10.20372/nadre:25792</relatedIdentifier>
    <relatedIdentifier relatedIdentifierType="URL" relationType="IsPartOf">https://nadre.ethernet.edu.et/communities/20-25</relatedIdentifier>
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  <rightsList>
    <rights rightsURI="info:eu-repo/semantics/openAccess">Open Access</rights>
  </rightsList>
  <descriptions>
    <description descriptionType="Abstract">&lt;p&gt;&lt;strong&gt;ABSTRACT&lt;/strong&gt;&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;Introduction:&lt;/strong&gt; Toxic goiter is a common endocrine disorder requiring long-term anti-thyroid drug therapy, yet evidence on time to biochemical euthyroidism and its predictors is limited in resource-limited settings. This study aimed to determine time to biochemical euthyroidism and its predictors among patients with toxic goiter treated with anti-thyroid drugs at Wallaga University Comprehensive Specialized Hospital.&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;Methods&lt;/strong&gt;: A five-year retrospective cohort study was conducted using 120 patient records selected from 143 eligible cases between January 1, 2021 and December 31, 2025. Data were collected using a structured checklist via Epi-data version 3.1 and analyzed using SPSS version 27. The Kaplan&amp;ndash;Meier survival curve with log-rank test was used to compare differences in time to biochemical euthyroidism across categorical variables. Variables with a p-value &amp;lt;0.25 in bivariable analysis were entered into the multivariable Cox proportional hazards regression model. The proportional hazards assumption was assessed using Schoenfeld residuals and log-minus-log survival plots, and no significant violation was observed. Model fitness was evaluated using the Cox&amp;ndash;Snell residual goodness-of-fit test, which indicated that the final model adequately fitted the data. Statistical significance was declared at p &amp;lt; 0.05.&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;Results&lt;/strong&gt;: The response rate was 83.9%. The mean age of participants was 38.6 &amp;plusmn; 12.4 years. The median time to biochemical euthyroidism was 6 months, based on Kaplan&amp;ndash;Meier survival analysis. Rural residence (AHR = 0.68, 95% CI: 0.50, 0.92) and higher baseline FT4 levels (AHR = 0.94, 95% CI: 0.90, 0.98) were significantly associated with delayed time to euthyroidism.&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;Conclusion and recommendation&lt;/strong&gt;: Although a substantial proportion achieved euthyroidism early, variability in response resulted in a broader distribution of time to normalization. Rural residence and higher baseline FT4 levels were significant predictors of delayed response. Strengthening early diagnosis, improving follow-up systems, and enhancing rural healthcare access are essential to improve treatment outcomes.&lt;/p&gt;

&lt;p&gt;&amp;nbsp;&lt;/p&gt;

&lt;p&gt;&amp;nbsp;&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;Keywords:&lt;/strong&gt; Toxic goiter, biochemical euthyroidism, survival analysis, Ethiopia&lt;/p&gt;

&lt;p&gt;&amp;nbsp;&lt;/p&gt;

&lt;p&gt;&amp;nbsp;&lt;/p&gt;

&lt;p&gt;&amp;nbsp;&lt;/p&gt;</description>
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