Summary
Samples of blood for estimation of beta-thromboglobulin (B. T. G.) in normal subjects
have been obtained both from blood donors at the end of their donation and from other
volunteers by standard venepuncture. The former was a satisfactory method in males
only.
By standard venepuncture females have on average lower values than males and in the
pre-menopausal age groups the difference is statistically significant.
Mean values vary little up to 59 years after which they rise slowly but steadily.
There is no significant difference in the mean B. T. G. values between the ABO blood
groups.
