Journal
DIABETOLOGIA
Volume 53, Issue 5, Pages 858-865Publisher
SPRINGER
DOI: 10.1007/s00125-010-1673-4
Keywords
Anthropometry; Diagnosis; Glucose intolerance; HbA(1c); Oral glucose tolerance test; Sex differences
Categories
Funding
- Danish Diabetes Association
- Danish Medical Research Council
- Danish Centre for Evaluation and Health Technology Assessment
- Novo Nordisk
- GlaxoSmithKline
- Copenhagen County
- Danish Heart Foundation
- Danish Pharmaceutical Association
- Augustinus Foundation
- Ib Henriksen Foundation
- Becket Foundation
- MRC [G0501184] Funding Source: UKRI
- Medical Research Council [G0501184] Funding Source: researchfish
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We aimed to examine whether sex differences in fasting plasma glucose (FPG), 2 h post-OGTT plasma glucose (2hPG) and HbA(1c) could be explained by differences in body size and/or body composition between men and women in a general non-diabetic Danish population. Moreover, we aimed to study to what degree the newly suggested high-risk HbA(1c) criteria overlapped with the current OGTT-based criteria of glucose intolerance. We used cross-sectional data from 6,006 non-diabetic men and women. HbA(1c) and FPG levels were measured and a 75 g OGTT was performed in all individuals. Height, weight and waist and hip circumferences were measured and BMI was calculated. Data were analysed in age-adjusted linear regression models. Men had higher FPG and HbA(1c) levels than women, and women had higher 2hPG levels than men. Sex differences in 2hPG levels were explained by differences in height and FPG levels, but sex differences in FPG or HbA(1c) levels were not explained by anthropometric measures. Among individuals with HbA(1c) in the high-risk range (6.0-6.5%), 73% had normal glucose tolerance. Sex differences in 2hPG levels after an OGTT may to some extent be a consequence of giving the same amount of glucose to individuals with different body size. In contrast, sex differences in FPG and HbA(1c) levels are likely to have a true physiological basis. In clinical practice, the HbA(1c) assay may be more convenient than the OGTT, but it is important to note that different populations are identified by the two methods. ClinicalTrials.gov NCT00289237 Supported by grants from the Danish Diabetes Association, the Danish Medical Research Council, the Danish Centre for Evaluation and Health Technology Assessment, Novo Nordisk, GlaxoSmithKline, Copenhagen County, The Danish Heart Foundation, The Danish Pharmaceutical Association, the Augustinus Foundation, the Ib Henriksen Foundation, and the Becket Foundation.
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