Weight status
T1–T3
Children’s weight status was measured at T1–T3 using parent-reports and objective anthropometric measurements of height and weight (dressed but without jacket/shoes). Body weight was assessed with the personal floor scale Kern MPB 300K100, and the Stadiometer seca 217 measured the participants’ body height. To ensure privacy, measurement and weighing were performed individually and, if necessary, behind a folding screen. At T4, this standardized protocol is implemented during the on-site session. Self-reported weight is additionally collected with one self-constructed item in the online survey.