To analyze whether baseline psychosocial
variables can be used to predict weight change up to a 12 - month follow - up examination in children and adolescents who attend a «best -
practice» routine - care lifestyle intervention, we conducted a longitudinal analysis with 3
assessment waves: at baseline (T0: within 3 weeks before the start of the intervention) body weight and height of participants and family members and the psychosocial family characteristics were assessed; at the conclusion of the program (T1: 1 year after T0) and 1 year after conclusion (T2: 2 years after T0), body weights and heights of participants were reassessed.