Smoking and cough frequency.
The number of coughs occurring in small groups of subjects was noted by observers who also noted the time of lighting a cigarette by each member of the group. Those who smoked during the periods of observation coughed twice as often as those who did not; men coughed twice as often as did women.
D000704:Analysis of Variance; D003371:Cough / Q000453:epidemiology*; D005260:Female; D006801:Humans; D008297:Male; D012737:Sex Factors; D012907:Smoking / Q000150:complications*; D014481:United States