In the United States, interviews with parents reveal that as many as two thirds of documented instances of physical abuse begin as acts of corporal punishment meant to correct a childs behavior, while a large-scale Canadian study found that three quarters of substantiated cases of physical abuse of children have occurred within the context of physical punishment. Other studies have shown that children and infants who are spanked by parents are several times more likely to be severely assaulted by their parents or suffer an injury requiring medical attention. Studies indicate that such abusive treatment often involves parents attributing conflict to their childs willfulness or rejection, as well as "coercive family dynamics and conditioned emotional responses". Factors involved in the escalation of ordinary physical punishment by parents into confirmed child abuse may be the punishing parents inability to control their anger or judge their own strength, and the parent being unaware of the childs physical vulnerabilities.Children resulting from unintended pregnancies are more likely to be abused or neglected. In addition, unintended pregnancies are more likely than intended pregnancies to be associated with abusive relationships, and there is an increased risk of physical violence during pregnancy. They also result in poorer maternal mental health, and lower mother-child relationship quality.There is some limited evidence that children with moderate or severe disabilities are more likely to be victims of abuse than non-disabled children.
: 6 In 2012, Child Protective Services (CPS) agencies estimated that about 9 out of 1000 children in the United States were victims of child maltreatment. Most (78%) were victims of neglect. Physical abuse, sexual abuse, and other types of maltreatment, were less common, making up 18%, 9%, and 11% of cases, respectively ("other types" included emotional abuse, parental substance use, and inadequate supervision). According to data reported by the Childrens Bureau of the US Department of Health and Human Services, more than 3.5 million allegations of child abuse were looked into by child protective services who in turn confirmed 674,000 of those cases in 2017. However, CPS reports may underestimate the true scope of child maltreatment. A non-CPS study estimated that one in four children experience some form of maltreatment in their lifetimes, according to the Centers for Disease Control and Prevention (CDC).In February 2017, the American Public Health Association published a Washington University study estimating 37% of American children experienced a child protective services investigation by age 18 (or 53% if African American).According to David Finkelhor who tracked Child Maltreatment Report (NCANDS) data from 1990 to 2010, sexual abuse had declined 62% from 1992 to 2009 and the long-term trend for physical abuse was also down by 56% since 1992. He stated: "It is unfortunate that information about the trends in child maltreatment are not better publicized and more widely known. The long-term decline in sexual and physical abuse may have important implications for public policy.