Summary
In 386 men aged 40–49 years the number of platelets was related to differences in
smoking habits. “Platelet adhesiveness” (retention) was estimated by a glass bead
filter method in 376 of these men. The estimation of “adhesiveness” was performed
in native blood without anticoagulants at least 12 hr after the last cigarette smoked.
A small but statistically highly significant increase in platelet count, in number
of “adhesive platelets” and percentage of “adhesive platelets” was found in smokers
as compared with non-smokers, the highest values being found in the heaviest smokers
and vice versa. Such smoking-related changes in platelet count and reactiveness might
unfavourably influence the tendency towards coronary thrombosis, and might in part
explain the deleterious effects of smoking on coronary heart disease morbidity and
mortality.