According to the World Health Organization (WHO), estimates of the rates of child maltreatment vary widely by country, depending on how child maltreatment is defined, the type of maltreatment studied, the scope and quality of data gathered, and the scope and quality of surveys that ask for self-reports from victims, parents, and caregivers. Despite these limitations, international studies show that a quarter of all adults report experiencing physical abuse as children, and that 1 in 5 women and 1 in 13 men report experiencing childhood sexual abuse. Emotional abuse and neglect are also common childhood experiences.As of 2014, an estimated 41,000 children under 15 are victims of homicide each year. The WHO states that this number underestimates the true extent of child homicide; a significant proportion of child deaths caused by maltreatment are incorrectly attributed to unrelated factors such as falls, burns, and drowning. Also, girls are particularly vulnerable to sexual violence, exploitation and abuse in situations of armed conflict and refugee settings, whether by combatants, security forces, community members, aid workers, or others. United States
The National Research Council wrote in 1993 that "...the available evidence suggests that child abuse and neglect is an important, prevalent problem in the United States [...] Child abuse and neglect are particularly  important compared with other critical childhood problems because they are often directly associated with adverse physical and mental health consequences in children and families".
The differences in these cultural beliefs demonstrate the importance of examining all cross-cultural perspectives when studying the concept of child abuse. Some professionals argue that cultural norms that sanction physical punishment are one of the causes of child abuse, and have undertaken campaigns to redefine such norms.As of 2006, between 25,000 and 50,000 children in Kinshasa, Democratic Republic of the Congo, had been accused of witchcraft and abandoned. In Malawi it is common practice to accuse children of witchcraft and many children have been abandoned, abused and even killed as a result. In the Nigerian, Akwa Ibom State and Cross River State about 15,000 children were branded as witches.In April 2015, public broadcasting reported that the rate of child abuse in South Korea had increased to 13% compared with the previous year, and 75% of attackers were the childrens own parents. Possible link to animal abuse
There are studies providing evidence of a link between child abuse and cruelty to animals. A large national survey by the Norwegian Centre for Violence and Traumatic Stress Studies found a "substantial overlap between companion animal abuse and child abuse" and that cruelty to animals "most frequently co-occurred with psychological abuse and less severe forms of physical child abuse," which "resonates with conceptualizations of domestic abuse as an ongoing pattern of psychological abuse and coercive control." Disclosure and assessment
Suspicion for physical abuse is recommended when injuries occur in a child who is not yet able to walk independently.