Many previous studies have linked indoor tanning to melanoma, a potentially fatal form of skin cancer. Growing numbers of people younger than 40 -- especially women -- have developed basal cell skincancer in recent years. The findings, which appear in the Journal of the American Academy of Dermatology, suggest that indoor tanning may play a role in this increase. As many as 28 million people use indoor tanning beds each year, according to the Indoor Tanning Association.
Researchers analyzed data from the Yale Study of Skin Health in Young People. It included more than 750 people under 40. Of these, slightly more than 69% were women.
Overall, people who had used indoor tanning beds were 69% more likely to develop basal cell skin cancer before age 40 when compared to people who did not.
The risk was greatest among women, the study showed. Women who tanned were more than twice as likely to develop basal cell skin cancer as those who never tanned.
Exactly why the effects of indoor tanning seem to be worse in women is not known. Women may start tanning earlier and tan more frequently than men, the study authors write. About 43% of basal cell skin cancers occurring at an early age in women could be prevented if there were a ban on indoor tanning beds, they point out.
Other factors that increased risk in the presence of indoor tanning were:
History of more than one basal cell skin cancer
History of a sunburn particularly at the site of the cancer
Use of high-speed, high-intensity, or high-pressure tanning beds