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Limitations of fasting indices in the measurement of insulin sensitivity in Afro-Caribbean adults
BACKGROUND: Insulin sensitivity can be estimated using glucose disposal rate (M) measured during a hyperinsulinemic euglycemic clamp (HEC) or insulin sensitivity index (S(I)) derived from a frequently sampled intravenous glucose tolerance test (FSIVGTT). The commonly used homeostatic model assessmen...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
BioMed Central
2014
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3936907/ https://www.ncbi.nlm.nih.gov/pubmed/24555815 http://dx.doi.org/10.1186/1756-0500-7-98 |
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author | Thompson, Debbie S Boyne, Michael S Osmond, Clive Ferguson, Trevor S Tulloch-Reid, Marshall K Wilks, Rainford J Barnett, Alan T Forrester, Terrence E |
author_facet | Thompson, Debbie S Boyne, Michael S Osmond, Clive Ferguson, Trevor S Tulloch-Reid, Marshall K Wilks, Rainford J Barnett, Alan T Forrester, Terrence E |
author_sort | Thompson, Debbie S |
collection | PubMed |
description | BACKGROUND: Insulin sensitivity can be estimated using glucose disposal rate (M) measured during a hyperinsulinemic euglycemic clamp (HEC) or insulin sensitivity index (S(I)) derived from a frequently sampled intravenous glucose tolerance test (FSIVGTT). The commonly used homeostatic model assessment of insulin resistance (HOMA-IR) which utilizes fasting glucose and insulin has been validated against M across several populations (r = 0.5-0.8). This study sought to validate HOMA-IR against S(I) and M in an Afro-Caribbean population. FINDINGS: Sixty participants completed a 180-minute FSIVGTT and another 50 completed a 150-minute hyperinsulinemic euglycemic clamp. In both groups, HOMA-IR was calculated and anthropometry and body composition using dual energy x-ray absorptiometry (DEXA) were measured. FSIVGTT: The participants were 55% male, age 23.1 ± 0.05 years, BMI 24.8 ± 6.3 kg/m(2) and % body fat 25.0 ± 15.2 (mean ± SD). HEC: The participants were 44% male, age 27.3 ± 8.1 years, BMI 23.6 ± 5.0 kg/m(2) and % body fat 24.7 ± 14.2 (mean ± SD). While HOMA-IR, S(I) and M correlated with waist, BMI and % body fat (P-values < 0.01) there were no significant correlations between HOMA-IR with either S(I) or M-value (P-values > 0.2). CONCLUSIONS: In young Afro-Caribbean adults, HOMA-IR compared poorly with other measures of insulin sensitivity. It remains important to determine whether similar findings occur in a more insulin resistant population. However, HOMA-IR correlated with clinical measures of insulin sensitivity (i.e. adiposity), so it may still be useful in epidemiological studies. |
format | Online Article Text |
id | pubmed-3936907 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2014 |
publisher | BioMed Central |
record_format | MEDLINE/PubMed |
spelling | pubmed-39369072014-03-06 Limitations of fasting indices in the measurement of insulin sensitivity in Afro-Caribbean adults Thompson, Debbie S Boyne, Michael S Osmond, Clive Ferguson, Trevor S Tulloch-Reid, Marshall K Wilks, Rainford J Barnett, Alan T Forrester, Terrence E BMC Res Notes Short Report BACKGROUND: Insulin sensitivity can be estimated using glucose disposal rate (M) measured during a hyperinsulinemic euglycemic clamp (HEC) or insulin sensitivity index (S(I)) derived from a frequently sampled intravenous glucose tolerance test (FSIVGTT). The commonly used homeostatic model assessment of insulin resistance (HOMA-IR) which utilizes fasting glucose and insulin has been validated against M across several populations (r = 0.5-0.8). This study sought to validate HOMA-IR against S(I) and M in an Afro-Caribbean population. FINDINGS: Sixty participants completed a 180-minute FSIVGTT and another 50 completed a 150-minute hyperinsulinemic euglycemic clamp. In both groups, HOMA-IR was calculated and anthropometry and body composition using dual energy x-ray absorptiometry (DEXA) were measured. FSIVGTT: The participants were 55% male, age 23.1 ± 0.05 years, BMI 24.8 ± 6.3 kg/m(2) and % body fat 25.0 ± 15.2 (mean ± SD). HEC: The participants were 44% male, age 27.3 ± 8.1 years, BMI 23.6 ± 5.0 kg/m(2) and % body fat 24.7 ± 14.2 (mean ± SD). While HOMA-IR, S(I) and M correlated with waist, BMI and % body fat (P-values < 0.01) there were no significant correlations between HOMA-IR with either S(I) or M-value (P-values > 0.2). CONCLUSIONS: In young Afro-Caribbean adults, HOMA-IR compared poorly with other measures of insulin sensitivity. It remains important to determine whether similar findings occur in a more insulin resistant population. However, HOMA-IR correlated with clinical measures of insulin sensitivity (i.e. adiposity), so it may still be useful in epidemiological studies. BioMed Central 2014-02-20 /pmc/articles/PMC3936907/ /pubmed/24555815 http://dx.doi.org/10.1186/1756-0500-7-98 Text en Copyright © 2014 Thompson et al.; licensee BioMed Central Ltd. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. |
spellingShingle | Short Report Thompson, Debbie S Boyne, Michael S Osmond, Clive Ferguson, Trevor S Tulloch-Reid, Marshall K Wilks, Rainford J Barnett, Alan T Forrester, Terrence E Limitations of fasting indices in the measurement of insulin sensitivity in Afro-Caribbean adults |
title | Limitations of fasting indices in the measurement of insulin sensitivity in Afro-Caribbean adults |
title_full | Limitations of fasting indices in the measurement of insulin sensitivity in Afro-Caribbean adults |
title_fullStr | Limitations of fasting indices in the measurement of insulin sensitivity in Afro-Caribbean adults |
title_full_unstemmed | Limitations of fasting indices in the measurement of insulin sensitivity in Afro-Caribbean adults |
title_short | Limitations of fasting indices in the measurement of insulin sensitivity in Afro-Caribbean adults |
title_sort | limitations of fasting indices in the measurement of insulin sensitivity in afro-caribbean adults |
topic | Short Report |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3936907/ https://www.ncbi.nlm.nih.gov/pubmed/24555815 http://dx.doi.org/10.1186/1756-0500-7-98 |
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