"After controlling for potential confounders, higher monthly ejaculation frequency was associated with a statistically significant decreased risk of total prostate cancer compared to the reference group at every time period."
At recruitment in 1992, 31,925 men from Health Professionals Follow-up Study were questioned on their average monthly ejaculation frequency during the ages of 20-29 and 40-49, and in the previous year (1991) from which a lifetime average was computed. During 437,490 person-years of follow-up, 3,839 of these men were diagnosed with incident prostate cancer, including 384 lethal cases. Cox proportional hazards models were used to compute the risk of prostate cancer associated with average monthly ejaculation frequency compared to a referent group reporting 4-7 ejaculations/month.
Ejaculation frequency and risk of prostate cancer: updated results from the Health Professionals Follow-up Study [Rider, Jennifer (Boston, MA); Rider, Jennifer; Wilson, Kathryn; Wilson, Kathryn; Kelly, Rachel; Kelly, Rachel; Ebot, Erika; Ebot, Erika; Giovannucci, Edward; Giovannucci, Edward; Mucci, Lorelei; Mucci, Lorelei/American Urological Association]
(Image: Grapefruit Skin,
Sam MacCutchan, CC-BY-SA)