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. 2001 May;77(907):323–325. doi: 10.1136/pmj.77.907.323

Importance of family history in type 2 black South African diabetic patients

R Erasmus 1, E Blanco 1, A Okesina 1, J Arana 1, Z Gqweta 1, T Matsha 1
PMCID: PMC1742028  PMID: 11320276

Abstract

OBJECTIVE—To assess the family history of diabetes in type 2 black South African diabetics with emphasis on the parental phenotype.
DESIGN—Prospective case-control study in which family histories were obtained from patients.
SETTING—Diabetic clinic of a provincial teaching hospital in the Transkei region of South Africa.
SUBJECTS—A total of 1111 type 2 diabetics attending the diabetic clinic and 687 controls.
MAIN OUTCOME MEASURES—History of diabetes in parents, siblings, maternal and paternal grandparents, aunts, and uncles.
RESULTS—Altogether 27.3% of diabetic subjects had a family history of diabetes compared with 8.4% in the control group (p<0.01). Among the group with positive family history 82.6% reported only one diabetic family member, while 17.4% reported at least two relatives; 6.6% had a diabetic relative from both maternal and paternal sides, and 87.8% had first degree relative with diabetes. Among them there was a significant maternal aggregation with 64.7% of patients having a diabetic mother compared with 27% who had a diabetic father (p<0.01). No maternal effect was observed among the second and third degree relatives. Patients with positive family history had an earlier onset of diabetes than those without family history (p<0.01).
CONCLUSION—These data suggest that type 2 diabetes is heritable in black South African diabetics. It is also likely that maternal influences may play an important part.


Keywords: diabetes; family history

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Selected References

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