I read this statistic in an article about Caroline Flack earlier today and thought there must be some caveat, but it's seemingly true.
Women now commit almost a third of domestic assaults and charities estimate the true figure to be much higher due to the stigma men face in coming forward - this is backed up by other studies which show that the number of assaults against men always comes out higher when interviewing women rather than men (i.e. more women apparently admit to having assaulted their partner than men admit to having been assaulted).
I'm a bit shocked by this and surprised it's not been mentioned on here.