Ethnic disparities in the association of impaired fasting glucose with the 10-year cumulative incidence of type 2 diabetes |
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Authors: | W.M. Admiraal F. Holleman M.B. Snijder R.J.G. Peters L.M. Brewster J.B.L. Hoekstra K. Stronks I.G.M. van Valkengoed |
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Affiliation: | 1. Department of Public Health, Academic Medical Center, Amsterdam, The Netherlands;2. Department of Internal Medicine, Academic Medical Center, Amsterdam, The Netherlands;3. Department of Cardiology, Academic Medical Center, Amsterdam, The Netherlands;4. Department of Vascular Medicine, Academic Medical Center, Amsterdam, The Netherlands |
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Abstract: | AimsEvidence of ethnic disparities in the conversion of prediabetes to type 2 diabetes is scarce. We studied the association of impaired fasting glucose (IFG) and fasting plasma glucose (FPG) with the 10-year cumulative incidence of type 2 diabetes in three ethnic groups.MethodsWe analyzed data for 90 South-Asian Surinamese, 190 African-Surinamese, and 176 ethnic Dutch that were collected in the periods 2001–2003 and 2011–2012. We excluded those with type 2 diabetes or missing FPG data. We defined baseline IFG as FPG of 5.7–6.9 mmol/L. We defined type 2 diabetes at follow-up as FPG ≥ 7.0 mmol/L, HbA1c ≥ 48 mmol/mol (6.5%), or self-reported type 2 diabetes.Results10-Year cumulative incidences of type 2 diabetes were: South-Asian Surinamese, 18.9%; African-Surinamese, 13.7%; ethnic Dutch, 4.5% (p < 0.05). The adjusted association of baseline IFG and FPG with the 10-year cumulative incidence of type 2 diabetes was stronger for South-Asian Surinamese than for African-Surinamese and ethnic Dutch. The IFG (compared to normoglycaemia) ORs were 11.1 [3.0–40.8] for South-Asian Surinamese, 5.1 [2.0–13.3] for African-Surinamese, and 2.2 [0.5–10.1] for ethnic Dutch.ConclusionsThe 10-year cumulative incidence of type 2 diabetes was higher and associations with baseline IFG and FPG were stronger among South-Asian Surinamese and African-Surinamese than among ethnic Dutch. Our findings confirm the high risk of type 2 diabetes in South-Asians and suggest more rapid conversion in populations of South-Asian origin and (to a lesser extent) African origin than European origin. |
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Keywords: | Ethnicity IFG Type 2 diabetes incidence |
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