"Most children and youths feel burdened, worry more, pay less attention to their health and complain more often about quarrels in the family. For every second child, the relationship with their friends has suffered due to the lack of physical contact," said Prof. Dr. Ulrike Ravens-Sieberer, head of the study and the "Child Public Health" research group at the UKE's Department of Child and Adolescent Psychiatry, Psychotherapy and Psychosomatics.