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Abdominal visceral and subcutaneous adipose tissue and associations with cardiometabolic risk in Inuit, Africans and Europeans: a cross-sectional study.

Authors
  • Rønn, Pernille Falberg1, 2
  • Andersen, Gregers Stig3
  • Lauritzen, Torsten4
  • Christensen, Dirk Lund5
  • Aadahl, Mette6, 7
  • Carstensen, Bendix3
  • Grarup, Niels8
  • Jørgensen, Marit Eika3, 9, 10
  • 1 Clinical Epidemiology, Steno Diabetes Center Copenhagen, Gentofte, Denmark [email protected] , (Denmark)
  • 2 Department of Public Health, Centre for Arctic Health, Aarhus University, Aarhus, Denmark. , (Denmark)
  • 3 Clinical Epidemiology, Steno Diabetes Center Copenhagen, Gentofte, Denmark. , (Denmark)
  • 4 Department of Public Health, General Practice, Aarhus University, Aarhus, Denmark. , (Denmark)
  • 5 Department of Public Health, Global Health Section, University of Copenhagen, Copenhagen, Denmark. , (Denmark)
  • 6 Center for Clinical Research and Prevention, Frederiksberg and Bispebjerg Hospital, Frederiksberg, Denmark. , (Denmark)
  • 7 Department of Public Health, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark. , (Denmark)
  • 8 Novo Nordisk Foundation, Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Kobenhavn, Denmark. , (Denmark)
  • 9 National Institute of Public Health, University of Southern Denmark, Copenhagen, Denmark. , (Denmark)
  • 10 Greenland University, Nuuk, Greenland. , (Greenland)
Type
Published Article
Journal
BMJ Open
Publisher
BMJ
Publication Date
Sep 14, 2020
Volume
10
Issue
9
Identifiers
DOI: 10.1136/bmjopen-2020-038071
PMID: 32928857
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Abdominal fat has been identified as a risk marker of cardiometabolic disease independent of overall adiposity. However, it is not clear whether there are ethnic disparities in this risk. We investigated the associations of visceral adipose tissue (VAT) and abdominal subcutaneous adipose tissue (SAT) with cardiometabolic risk factors in three ethnic diverse populations of Inuit, Africans and Europeans. Cross-sectional pooled study. Greenland, Kenya and Denmark. A total of 5113 participants (2933 Inuit, 1397 Africans and 783 Europeans) from three studies in Greenland, Kenya and Denmark were included. Measurements included abdominal fat distribution assessed by ultrasound, oral glucose tolerance test, hepatic insulin resistance, blood pressure and lipids. The associations were analysed using multiple linear regressions. Across ethnic group and gender, an increase in VAT of 1 SD was associated with higher levels of hepatic insulin resistance (ranging from 14% to 28%), triglycerides (8% to 16%) and lower high-density lipoprotein cholesterol (HDL-C, -1.0 to -0.05 mmol/L) independent of body mass index. VAT showed positive associations with most of the other cardiometabolic risk factors in Inuit and Europeans, but not in Africans. In contrast, SAT was mainly associated with the outcomes in Inuit and Africans. Of notice was that higher SAT was associated with higher HDL-C in African men (0.11 mmol/L, 95% CI: 0.03 to 0.18) and with lower HDL-C in Inuit (-0.07 mmol/L, 95% CI: -0.12 to -0.02), but not in European men (-0.02 mmol/L, 95% CI: -0.09 to 0.05). Generally weaker associations were observed for women. Furthermore, the absolute levels of several of the cardiometabolic outcomes differed between the ethnic groups. VAT and SAT were associated with several of the cardiometabolic risk factors beyond overall adiposity. Some of these associations were specific to ethnicity, suggesting that ethnicity plays a role in the pathway from abdominal fat to selected cardiometabolic risk factors. © Author(s) (or their employer(s)) 2020. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

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