Factors affecting fasting serum C-peptide levels in Micronesians: comparison with a Caucasoid population

P. Garcia-Webb, P. Zimmet, A. Bonser, H. King, S. Bottomley

Research output: Contribution to journalArticleResearchpeer-review

10 Citations (Scopus)


Fasting serum C-peptide immunoreactivity was determined on Nauruans, a Micronesian population with a high prevalence of diabetes. In Micronesian subjects neither age nor gender had a significant effect on fasting serum C-peptide. In non-diabetic subjects, as has been shown previously for Caucasiod subjects, both obesity and fasting plasma glucose levels were determinants of fasting serum C-peptide. Obesity was the major determinant. Taken overall, mean fasting serum C-peptide increased then possibly fell in subjects grouped by increasing 2-h post-glucose plasma glucose levels. Mean fasting serum C-peptide in newly-diagnosed diabetic subjects was greater than that in non-diabetic subjects with a similar degree of obesity, supporting the concept that the transition to diabetes may be associated with an increase in insulin resistance. The data for non-diabetic subjects were compared with serum C-peptide measured in the same laboratory on samples from a Caucasoid population in Busselton, Western Australia. There was no difference in fasting serum C-peptide level between Micronesian and Caucasoid subjects approximately matched for obesity and fasting plasma glucose levels.

Original languageEnglish
Pages (from-to)23-26
Number of pages4
Issue number1
Publication statusPublished - Jul 1984
Externally publishedYes


  • C-peptide
  • Caucasoid
  • fasting
  • glucose
  • Micronesian
  • obesity
  • Type 2 diabetes

Cite this