Comparison of the Changes in Quality-of-Life of Cats with Hyperthyroidism Treated with Radioiodine or Antithyroid Drugs—A Preliminary Study

A previous cross-sectional study found impaired health-related quality of life (HRQoL) in hyperthyroid cats, but the longitudinal impact of treatment—especially differences between radioiodine (RAIT) and antithyroid drug (ATD) approaches—remains unclear. This study aimed to evaluate changes in HRQoL...

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Main Authors: Fabienne Blunschi, Sofie Muthmann, Natali Bauer, Katarina Hazuchova
Format: Article
Language:English
Published: MDPI AG 2025-06-01
Series:Veterinary Sciences
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Online Access:https://www.mdpi.com/2306-7381/12/6/572
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author Fabienne Blunschi
Sofie Muthmann
Natali Bauer
Katarina Hazuchova
author_facet Fabienne Blunschi
Sofie Muthmann
Natali Bauer
Katarina Hazuchova
author_sort Fabienne Blunschi
collection DOAJ
description A previous cross-sectional study found impaired health-related quality of life (HRQoL) in hyperthyroid cats, but the longitudinal impact of treatment—especially differences between radioiodine (RAIT) and antithyroid drug (ATD) approaches—remains unclear. This study aimed to evaluate changes in HRQoL in recently diagnosed (<6 months) hyperthyroid cats that underwent RAIT or received ATD. HRQoL was assessed using the validated HyperthyroidismQoL-cat questionnaire at baseline and after 1, 3, and 6 months, alongside thyroid status (eu-/hypo-/hyperthyroid) evaluation. Mixed-effects model analysed the influence of treatment type, timepoint, and thyroid status on log(HRQoL). HRQoL differences between groups at baseline and comparison to a non-hyperthyroid control group (n = 322) from a previous study at month 6 were examined using Mann–Whitney U tests. Data are presented as median (range), with significance set at <i>p</i> < 0.05. Thirty-eight client-owned hyperthyroid cats (15 ATD, 23 RAIT) were included. HRQoL scores at baseline did not differ between groups (RAIT: 103.5 [27–211], ATD: 73 [22–260], <i>p</i> = 0.22). HRQoL significantly improved over time (<i>p</i> < 0.001) but was not affected by treatment type (<i>p</i> = 0.20) or thyroid status (<i>p</i> = 0.40). Despite improvement, HRQoL remained lower than in non-hyperthyroid controls (hyperthyroid: 42.5 [3–161.5], non-hyperthyroid: 27 [0–249], <i>p</i> = 0.007). This study highlights the overall positive impact of treatment on HRQoL, but due to the lack of randomisation and heterogeneity of subjects and treatment, conclusion have to be considered preliminary.
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spelling doaj-art-8de161b7b4a6463ea9bcf7c4414f3fe02025-06-25T14:30:36ZengMDPI AGVeterinary Sciences2306-73812025-06-0112657210.3390/vetsci12060572Comparison of the Changes in Quality-of-Life of Cats with Hyperthyroidism Treated with Radioiodine or Antithyroid Drugs—A Preliminary StudyFabienne Blunschi0Sofie Muthmann1Natali Bauer2Katarina Hazuchova3Clinic for Small Animals (Internal Medicine, Clinical Pathology and Clinical Pathophysiology), Justus-Liebig-University,35392 Giessen, GermanyClinic for Small Animals (Internal Medicine, Clinical Pathology and Clinical Pathophysiology), Justus-Liebig-University,35392 Giessen, GermanyClinic for Small Animals (Internal Medicine, Clinical Pathology and Clinical Pathophysiology), Justus-Liebig-University,35392 Giessen, GermanyClinic for Small Animals (Internal Medicine, Clinical Pathology and Clinical Pathophysiology), Justus-Liebig-University,35392 Giessen, GermanyA previous cross-sectional study found impaired health-related quality of life (HRQoL) in hyperthyroid cats, but the longitudinal impact of treatment—especially differences between radioiodine (RAIT) and antithyroid drug (ATD) approaches—remains unclear. This study aimed to evaluate changes in HRQoL in recently diagnosed (<6 months) hyperthyroid cats that underwent RAIT or received ATD. HRQoL was assessed using the validated HyperthyroidismQoL-cat questionnaire at baseline and after 1, 3, and 6 months, alongside thyroid status (eu-/hypo-/hyperthyroid) evaluation. Mixed-effects model analysed the influence of treatment type, timepoint, and thyroid status on log(HRQoL). HRQoL differences between groups at baseline and comparison to a non-hyperthyroid control group (n = 322) from a previous study at month 6 were examined using Mann–Whitney U tests. Data are presented as median (range), with significance set at <i>p</i> < 0.05. Thirty-eight client-owned hyperthyroid cats (15 ATD, 23 RAIT) were included. HRQoL scores at baseline did not differ between groups (RAIT: 103.5 [27–211], ATD: 73 [22–260], <i>p</i> = 0.22). HRQoL significantly improved over time (<i>p</i> < 0.001) but was not affected by treatment type (<i>p</i> = 0.20) or thyroid status (<i>p</i> = 0.40). Despite improvement, HRQoL remained lower than in non-hyperthyroid controls (hyperthyroid: 42.5 [3–161.5], non-hyperthyroid: 27 [0–249], <i>p</i> = 0.007). This study highlights the overall positive impact of treatment on HRQoL, but due to the lack of randomisation and heterogeneity of subjects and treatment, conclusion have to be considered preliminary.https://www.mdpi.com/2306-7381/12/6/572felinequestionnairetreatmentwelfareendocrinology
spellingShingle Fabienne Blunschi
Sofie Muthmann
Natali Bauer
Katarina Hazuchova
Comparison of the Changes in Quality-of-Life of Cats with Hyperthyroidism Treated with Radioiodine or Antithyroid Drugs—A Preliminary Study
Veterinary Sciences
feline
questionnaire
treatment
welfare
endocrinology
title Comparison of the Changes in Quality-of-Life of Cats with Hyperthyroidism Treated with Radioiodine or Antithyroid Drugs—A Preliminary Study
title_full Comparison of the Changes in Quality-of-Life of Cats with Hyperthyroidism Treated with Radioiodine or Antithyroid Drugs—A Preliminary Study
title_fullStr Comparison of the Changes in Quality-of-Life of Cats with Hyperthyroidism Treated with Radioiodine or Antithyroid Drugs—A Preliminary Study
title_full_unstemmed Comparison of the Changes in Quality-of-Life of Cats with Hyperthyroidism Treated with Radioiodine or Antithyroid Drugs—A Preliminary Study
title_short Comparison of the Changes in Quality-of-Life of Cats with Hyperthyroidism Treated with Radioiodine or Antithyroid Drugs—A Preliminary Study
title_sort comparison of the changes in quality of life of cats with hyperthyroidism treated with radioiodine or antithyroid drugs a preliminary study
topic feline
questionnaire
treatment
welfare
endocrinology
url https://www.mdpi.com/2306-7381/12/6/572
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