Fig. 5
From: Effects of alcohol use on sperm chromatin structure, a retrospective analysis
Shows the relationship between tobacco use and % motility of sperm (% motile sperm in a semen sample) in a cohort of 209 human male subjects presenting with their partners to an infertility clinic in the American Midwest. As can be seen, the mean and median motility are higher in non-smokers. There were 45 smokers and 164 non-smokers. This difference was significant when analyzed with a logistic regression model (p < 0.0001)