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In this prospective, population-based study, investigators evaluated the association between cigarette smoking and erectile dysfunction (ED) among 1329 men (age range, 40-79) with regular sexual partners; the study excluded men with conditions that could impede normal urinary function (e.g., history of prostate cancer, prostatectomy). Every 2 years, researchers visited participants in their homes and collected information on demographics, urinary tract symptoms, and cigarette smoking; during the fourth visit, self-administered questionnaires were used to assess erectile function.
Overall, 63% of the men had smoked at some time in their lives. Regardless of smoking status, 15% had ED. Among men in their forties, current smokers were almost th…