Presents data on trends in nonfatal intimate partner violence among U.S. households from 1993 to 2011. Intimate partner violence includes rape, sexual assault, robbery, aggravated assault, and simple assault by a current or former spouse, boyfriend, or girlfriend. This report focuses on attributes of the victimization such as the type of crime, type of attack, whether the victim was threatened before the attack, use of a weapon by the offender, victim injury, and medical treatment received for injuries. The report also describes ways these attributes of the victimization may be used to measure seriousness or severity of the incident. Data are from the National Crime Victimization Survey (NCVS), which collects information on nonfatal crimes reported and not reported to the police. The NCVS is a self-report survey administered every six months to persons age 12 or older from a nationally representative sample of U.S. households.