Serum insulin-like growth factor I in a random population sample of men and women: relation to age, sex, smoking habits, coffee consumption and physical activity, blood pressure and concentrations of plasma lipids, fibrinogen, parathyroid hormone and osteocalcin

Clin Endocrinol (Oxf). 1994 Sep;41(3):351-7. doi: 10.1111/j.1365-2265.1994.tb02556.x.


Objective: There is a clinical need for population based reference values for serum insulin-like growth factor I (IGF-I). We have therefore determined serum IGF-I concentrations in a random population sample from Sweden and have related the levels to age, sex, life style factors, blood pressure, body composition, blood lipids, plasma fibrinogen, parathyroid hormone (PTH) and osteocalcin.

Patients: Within the framework of the WHO MONICA Project in the city of Göteborg, Sweden, 197 men and 195 women aged 25-64 years were studied.

Results: Women aged 25-34 years had higher IGF-I concentration than men (mean 278 vs 227 micrograms/l) but in the interval 55-64 years values were lower in women than in men (158 vs 171 micrograms/l). IGF-I correlated positively with height and inversely with age, body mass index, systolic blood pressure and total cholesterol in both sexes. Negative relations between IGF-I and high density lipoprotein-cholesterol, as well as with amount of tobacco smoked, were found in men, and between IGF-I and diastolic blood pressure, triglycerides and PTH in women. When age was allowed for in multivariate analyses, most of these relations disappeared. However, among men IGF-I was positively associated with fibrinogen and negatively with age and smoking. IGF-I was negatively associated with age and coffee consumption in women.

Conclusion: The present data can be used as reference values for IGF-I (at least in Caucasians) for the diagnosis of growth hormone disturbances and as guidelines for growth hormone substitution.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Age Factors
  • Blood Pressure / physiology
  • Coffee / adverse effects
  • Exercise / physiology
  • Female
  • Fibrinogen / analysis
  • Humans
  • Insulin-Like Growth Factor I / analysis*
  • Lipids / blood
  • Male
  • Middle Aged
  • Osteocalcin / blood
  • Parathyroid Hormone / blood
  • Reference Values
  • Sex Factors
  • Smoking / adverse effects


  • Coffee
  • Lipids
  • Parathyroid Hormone
  • Osteocalcin
  • Insulin-Like Growth Factor I
  • Fibrinogen