The study found that more than 400,000 women aged between 15 and 49 were raped during a 12-month period in 2006-2007, AFP reported.

A mass rape victim comforts her son in the town of Fizi, Congo, on Feb. 20. She was among nearly fifty women who were raped by Congolese soldiers on the night of Jan. 1. Her son suffered a head wound when soldiers threw him to the ground prior to the rape. A court later sentenced an army colonel to 20 years in prison, convicting him of crimes against humanity.
"Our results confirm that previous estimates of rape and sexual violence are severe underestimates of the true prevalence of sexual violence occurring," Amber Peterman, lead author of the study, told AFP.
The study reportedly did not gather data on sexual violence among boys and men, or in girls younger than 15 and older than 49.
"Even these new, much higher figures still represent a conservative estimate of the true prevalence of sexual violence because of chronic underreporting due to stigma, shame, perceived impunity, and exclusion of younger and older age groups as well as men," Peterman said.