Respiratory function measurements in a cohort of medical students: a ten-year follow-up.

Abstract
A cohort of medical students first seen in 1962 were examined for a 3rd time. The prevalence of symptoms of cough, phlegm and breathlessness among them remained low; smoking habits were light in comparison with those of the general population. Results of the 3 successive sets of measurements of lung function indicate that optimum values generally were reached in the early 20s, with little further change up to age 29. There was some evidence of reduced ventilatory capacity in subjects with histories of acute chest illnesses.