The impact of low triiodothyronine levels on mortality is mediated by malnutrition and cardiac dysfunction in incident hemodialysis patients

Hyang Mo Koo, Chan Ho Kim, Fa Mee Doh, Mi Jung Lee, Eun Jin Kim, Jae Hyun Han, Ji Suk Han, Hyung Jung Oh, Seung Hyeok Han, Tae Hyun Yoo, Shin Wook Kang

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Objective: Little is known about the impact of low triiodothyronine (T3) levels on mortality in end-stage renal disease (ESRD) patients starting hemodialysis (HD) and whether this impact is mediated by malnutrition, inflammation, or cardiac dysfunction. Design and methods: A prospective cohort of 471 incident HD patients from 36 dialysis centers within the Clinical Research Center for ESRD in Koreawas selected for this study. Based on the median value of T3, patients were divided into 'higher' and 'lower' groups, and all-cause and cardiovascular (CV) mortality rates were compared. In addition, associations between T3 levels and various nutritional, inflammatory, and echocardiographic parameters were determined. Results: Compared with those in the 'higher' T3 group, albumin, cholesterol, and triglyceride levels, lean body mass estimated by creatinine kinetics (LBM-Cr), and normalized protein catabolic rate (nPCR) were significantly lower in patients with 'lower' T3 levels. The 'lower' T3 group also had a higher left ventricular mass index (LVMI) and a lower ejection fraction (EF). Furthermore, correlation analysis revealed significant associations between T3 levels and nutritional and echocardiographic parameters. All-cause and CV mortality rates were significantly higher in patients with 'lower' T3 levels than in the 'higher' T3 group (113.4 vs 18.2 events per 1000 patient-years, P!0.001, and 49.8 vs 9.1 events per 1000 patient-years, PZ0.001, respectively). The Kaplan-Meier analysis also showed significantly worse cumulative survival rates in the 'lower' T3 group (P!0.001). In the Cox regression analysis, low T3 was an independent predictor of all-cause mortality even after adjusting for traditional risk factors (hazard ratioZ3.76, PZ0.021). However, the significant impact of low T3 on all-cause mortality disappeared when LBM-Cr, nPCR, LVMI, or EF were incorporated into the models. Conclusion: Low T3 has an impact on all-cause mortality in incident HD patients, partly via malnutrition and cardiac dysfunction.

Original languageEnglish
Pages (from-to)409-419
Number of pages11
JournalEuropean Journal of Endocrinology
Volume169
Issue number4
DOIs
Publication statusPublished - 2013 Oct 1

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Triiodothyronine
Malnutrition
Renal Dialysis
Mortality
Chronic Kidney Failure
Kaplan-Meier Estimate
Dialysis
Albumins
Creatinine
Triglycerides
Proteins
Survival Rate
Cholesterol
Regression Analysis
Inflammation
Research

All Science Journal Classification (ASJC) codes

  • Endocrinology, Diabetes and Metabolism
  • Endocrinology

Cite this

Koo, Hyang Mo ; Kim, Chan Ho ; Doh, Fa Mee ; Lee, Mi Jung ; Kim, Eun Jin ; Han, Jae Hyun ; Han, Ji Suk ; Oh, Hyung Jung ; Han, Seung Hyeok ; Yoo, Tae Hyun ; Kang, Shin Wook. / The impact of low triiodothyronine levels on mortality is mediated by malnutrition and cardiac dysfunction in incident hemodialysis patients. In: European Journal of Endocrinology. 2013 ; Vol. 169, No. 4. pp. 409-419.
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title = "The impact of low triiodothyronine levels on mortality is mediated by malnutrition and cardiac dysfunction in incident hemodialysis patients",
abstract = "Objective: Little is known about the impact of low triiodothyronine (T3) levels on mortality in end-stage renal disease (ESRD) patients starting hemodialysis (HD) and whether this impact is mediated by malnutrition, inflammation, or cardiac dysfunction. Design and methods: A prospective cohort of 471 incident HD patients from 36 dialysis centers within the Clinical Research Center for ESRD in Koreawas selected for this study. Based on the median value of T3, patients were divided into 'higher' and 'lower' groups, and all-cause and cardiovascular (CV) mortality rates were compared. In addition, associations between T3 levels and various nutritional, inflammatory, and echocardiographic parameters were determined. Results: Compared with those in the 'higher' T3 group, albumin, cholesterol, and triglyceride levels, lean body mass estimated by creatinine kinetics (LBM-Cr), and normalized protein catabolic rate (nPCR) were significantly lower in patients with 'lower' T3 levels. The 'lower' T3 group also had a higher left ventricular mass index (LVMI) and a lower ejection fraction (EF). Furthermore, correlation analysis revealed significant associations between T3 levels and nutritional and echocardiographic parameters. All-cause and CV mortality rates were significantly higher in patients with 'lower' T3 levels than in the 'higher' T3 group (113.4 vs 18.2 events per 1000 patient-years, P!0.001, and 49.8 vs 9.1 events per 1000 patient-years, PZ0.001, respectively). The Kaplan-Meier analysis also showed significantly worse cumulative survival rates in the 'lower' T3 group (P!0.001). In the Cox regression analysis, low T3 was an independent predictor of all-cause mortality even after adjusting for traditional risk factors (hazard ratioZ3.76, PZ0.021). However, the significant impact of low T3 on all-cause mortality disappeared when LBM-Cr, nPCR, LVMI, or EF were incorporated into the models. Conclusion: Low T3 has an impact on all-cause mortality in incident HD patients, partly via malnutrition and cardiac dysfunction.",
author = "Koo, {Hyang Mo} and Kim, {Chan Ho} and Doh, {Fa Mee} and Lee, {Mi Jung} and Kim, {Eun Jin} and Han, {Jae Hyun} and Han, {Ji Suk} and Oh, {Hyung Jung} and Han, {Seung Hyeok} and Yoo, {Tae Hyun} and Kang, {Shin Wook}",
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The impact of low triiodothyronine levels on mortality is mediated by malnutrition and cardiac dysfunction in incident hemodialysis patients. / Koo, Hyang Mo; Kim, Chan Ho; Doh, Fa Mee; Lee, Mi Jung; Kim, Eun Jin; Han, Jae Hyun; Han, Ji Suk; Oh, Hyung Jung; Han, Seung Hyeok; Yoo, Tae Hyun; Kang, Shin Wook.

In: European Journal of Endocrinology, Vol. 169, No. 4, 01.10.2013, p. 409-419.

Research output: Contribution to journalArticle

TY - JOUR

T1 - The impact of low triiodothyronine levels on mortality is mediated by malnutrition and cardiac dysfunction in incident hemodialysis patients

AU - Koo, Hyang Mo

AU - Kim, Chan Ho

AU - Doh, Fa Mee

AU - Lee, Mi Jung

AU - Kim, Eun Jin

AU - Han, Jae Hyun

AU - Han, Ji Suk

AU - Oh, Hyung Jung

AU - Han, Seung Hyeok

AU - Yoo, Tae Hyun

AU - Kang, Shin Wook

PY - 2013/10/1

Y1 - 2013/10/1

N2 - Objective: Little is known about the impact of low triiodothyronine (T3) levels on mortality in end-stage renal disease (ESRD) patients starting hemodialysis (HD) and whether this impact is mediated by malnutrition, inflammation, or cardiac dysfunction. Design and methods: A prospective cohort of 471 incident HD patients from 36 dialysis centers within the Clinical Research Center for ESRD in Koreawas selected for this study. Based on the median value of T3, patients were divided into 'higher' and 'lower' groups, and all-cause and cardiovascular (CV) mortality rates were compared. In addition, associations between T3 levels and various nutritional, inflammatory, and echocardiographic parameters were determined. Results: Compared with those in the 'higher' T3 group, albumin, cholesterol, and triglyceride levels, lean body mass estimated by creatinine kinetics (LBM-Cr), and normalized protein catabolic rate (nPCR) were significantly lower in patients with 'lower' T3 levels. The 'lower' T3 group also had a higher left ventricular mass index (LVMI) and a lower ejection fraction (EF). Furthermore, correlation analysis revealed significant associations between T3 levels and nutritional and echocardiographic parameters. All-cause and CV mortality rates were significantly higher in patients with 'lower' T3 levels than in the 'higher' T3 group (113.4 vs 18.2 events per 1000 patient-years, P!0.001, and 49.8 vs 9.1 events per 1000 patient-years, PZ0.001, respectively). The Kaplan-Meier analysis also showed significantly worse cumulative survival rates in the 'lower' T3 group (P!0.001). In the Cox regression analysis, low T3 was an independent predictor of all-cause mortality even after adjusting for traditional risk factors (hazard ratioZ3.76, PZ0.021). However, the significant impact of low T3 on all-cause mortality disappeared when LBM-Cr, nPCR, LVMI, or EF were incorporated into the models. Conclusion: Low T3 has an impact on all-cause mortality in incident HD patients, partly via malnutrition and cardiac dysfunction.

AB - Objective: Little is known about the impact of low triiodothyronine (T3) levels on mortality in end-stage renal disease (ESRD) patients starting hemodialysis (HD) and whether this impact is mediated by malnutrition, inflammation, or cardiac dysfunction. Design and methods: A prospective cohort of 471 incident HD patients from 36 dialysis centers within the Clinical Research Center for ESRD in Koreawas selected for this study. Based on the median value of T3, patients were divided into 'higher' and 'lower' groups, and all-cause and cardiovascular (CV) mortality rates were compared. In addition, associations between T3 levels and various nutritional, inflammatory, and echocardiographic parameters were determined. Results: Compared with those in the 'higher' T3 group, albumin, cholesterol, and triglyceride levels, lean body mass estimated by creatinine kinetics (LBM-Cr), and normalized protein catabolic rate (nPCR) were significantly lower in patients with 'lower' T3 levels. The 'lower' T3 group also had a higher left ventricular mass index (LVMI) and a lower ejection fraction (EF). Furthermore, correlation analysis revealed significant associations between T3 levels and nutritional and echocardiographic parameters. All-cause and CV mortality rates were significantly higher in patients with 'lower' T3 levels than in the 'higher' T3 group (113.4 vs 18.2 events per 1000 patient-years, P!0.001, and 49.8 vs 9.1 events per 1000 patient-years, PZ0.001, respectively). The Kaplan-Meier analysis also showed significantly worse cumulative survival rates in the 'lower' T3 group (P!0.001). In the Cox regression analysis, low T3 was an independent predictor of all-cause mortality even after adjusting for traditional risk factors (hazard ratioZ3.76, PZ0.021). However, the significant impact of low T3 on all-cause mortality disappeared when LBM-Cr, nPCR, LVMI, or EF were incorporated into the models. Conclusion: Low T3 has an impact on all-cause mortality in incident HD patients, partly via malnutrition and cardiac dysfunction.

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