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Am J Epidemiol 2002; 156:174-179.
Copyright © 2002 by the Johns Hopkins Bloomberg School of Public Health

ORIGINAL CONTRIBUTIONS

Increased Fibrinogen Levels among South Asians versus Whites in the United Kingdom Are Not Explained by Common Polymorphisms

Kirti Kain, Jonathan M. Blaxill, Andrew J. Catto, Peter J. Grant and Angela M. Carter

From the Unit of Molecular Vascular Medicine, Leeds General Infirmary, Leeds LS1 3EX, United Kingdom.

Determinants of fibrinogen level among South Asians are not established. In 1997–1999, plasma fibrinogen levels and prevalences of the fibrinogen polymorphisms A{alpha} Thr312Ala, ß-445G/A, and Bß Arg448Lys and correlates were compared among 100 apparently healthy United Kingdom South Asians and 100 age- and sex-matched Whites. Mean fibrinogen levels were higher in South Asians (3.33 g/liter, 95% confidence interval (CI): 3.16, 3.51) than in Whites (2.84 g/liter, 95% CI: 2.72, 2.96) (p < 0.0001), but genotype distributions were similar. Bß Arg448Lys was related to fibrinogen in South Asians (RR (n = 67): 3.22 g/liter, 95% CI: 3.03, 3.43; RK (n = 26): 3.72 g/liter, 95% CI: 3.65, 4.11; KK (n = 7): 3.07 g/liter, 95% CI: 2.53, 3.72) (p = 0.04) and Whites (p = 0.06). ß-455G/A was related to fibrinogen in Whites (GG (n = 56): 2.68 g/liter, 95% CI: 2.56, 2.86; GA (n = 37): 2.97 g/liter, 95% CI: 2.79, 3.17; AA (n = 5): 3.22 g/liter, 95% CI: 2.85, 3.65) (p = 0.02) and South Asians (p = 0.07). After adjustment for age, gender, body mass index, hypertension, cholesterol, triglycerides, smoking, A{alpha} Thr312Ala, and ß-455G/A, fibrinogen levels remained significantly higher in South Asians (3.56 g/liter, 95% CI: 3.35, 3.77) than in Whites (3.03 g/liter, 95% CI: 2.85, 3.22) (p < 0.0001). These findings suggest that increased fibrinogen levels among South Asians versus Whites are not due to differences in the prevalence of genetic polymorphisms that encode for fibrinogen. Am J Epidemiol 2002;156:174–9.

ethnic groups; fibrinogen; genotype; polymorphism (genetics)

Abbreviations: Abbreviations: PCR, polymerase chain reaction; RFLP, restriction fragment length polymorphism.


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Home page
 Am J EpidemiolHome page
C. Fischbacher and R. Bhopal
RE: "INCREASED FIBRINOGEN LEVELS AMONG SOUTH ASIANS VERSUS WHITES IN THE UNITED KINGDOM ARE NOT EXPLAINED BY COMMON POLYMORPHISMS"
Am. J. Epidemiol., April 1, 2003; 157(7): 664 - 665.
[Full Text] [PDF]

Home page
 Am J EpidemiolHome page
K. Kain, J. M. Blaxill, A. J. Catto, P. J. Grant, and A. M. Carter
THE AUTHORS REPLY
Am. J. Epidemiol., April 1, 2003; 157(7): 665 - 665.
[Full Text] [PDF]


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