10 or more sex partners linked to increased risk of cancer

More sex = more cancer?

A new study has found that having 10 or more sexual partners in a lifetime appears to be linked to a higher incidence of being diagnosed with cancer.

Carried out by researchers from Canada, Vienna, Italy, the U.K., and Turkey, the new study looked at data gathered from the English Longitudinal Study of Aging, which followed a sample of 2,537 men and 3,185 women age 50.

Participants were asked how many sexual partners they had had during their lifetime, with the answers categorized as 0-1; 2-4; 5-9; and 10 or more. The participants were also asked to rate their own health, including any long-term conditions, and provide information on their age, ethnicity, marital status, household income, smoking status, physical activity levels, and any depressive symptoms.

The findings, published online in the journal BMJ Sexual & Reproductive Health, showed there was a statistically significant association between the number of lifetime sexual partners and a cancer diagnosis among both men and women.

More specifically, men who reported 2-4 lifetime sexual partners were 57 per cent more likely to have been diagnosed with cancer than those who reported 0-1, while those who reported 10 or more partners were 69 per cent more likely to have received a cancer diagnosis.

For women, those who reported having 10 or more partners were 91 per cent more likely to have been diagnosed with cancer compared with women who reported 0-1 sexual partners.

The results also showed that for women, having a higher number of sexual partners was also linked to a higher chance of having a long-term health condition, with women who reported 5-9 or 10+ lifetime sexual partners 64 percent more likely to have a chronic condition which impacted their daily routine than those who said they had had 0-1 partners. However, the same association was not found among the men.

For both sexes, a higher number of sexual partners was also found to be associated with younger age, single status, being in the highest or lowest brackets of household wealth, smoking, frequent drinking, and doing more vigorous physical activity.

The researchers point out that as the study is observational, they cannot establish a cause and effect relationship. However, they add that the findings are in line with previous studies which have suggested that sexually transmitted infections could be involved in the development of several types of cancer and hepatitis.

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