SynthesisEndocrine2025
Effects of timing and scheduling in levothyroxine adherence to hypothyroidism control: Meta-analysis with trial sequential analysis of Randomized Clinical Trials.
Synthesis in Endocrine, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Authors and funding
7 authors.
Funding
Abstract
purposeTreatment adherence for chronic conditions is a common clinical challenge. This systematic review aimed to assess the impact of scheduling and timing on levothyroxine adherence in patients with hypothyroidism.
methodsWe searched multiple databases (PubMed, EMBASE, SCOPUS, Web Of Science, and CINAHL) using relevant terms related to hypothyroidism and medication adherence. Two independent reviewers conducted study selection, evaluation, and data extraction. The primary outcome was thyrotropin (TSH) levels, analyzed using inverse-variance meta-analysis. Trial sequential analysis (TSA) was conducted to assess the statistical reliability of the meta-analyses results.
resultsOf the 706 articles initially found, 11 met the inclusion criteria: eight assessed evening administration and three evaluated weekly administration of levothyroxine. Comparison between evening and morning administration showed no significant difference in changes of TSH levels (dTSH 0.18; 95% confidence interval [95%CI] -0.29-0.65, P = 0.46). However, considering weekly administration of levothyroxine, TSH levels were higher in the experimental group (dTSH 1.14; 95%CI 0.80-1.14, P < 0.01), although the mean final TSH remained within the reference range in both groups. TSA indicated that the required information size was achieved for scheduling interventions.
conclusionBoth daily timing and weekly administration of levothyroxine were effective in maintaining TSH levels within reference values. Individualized dosing regimens may be considered based on patient convenience and preference.
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