Type of variable | Specific variables |
---|---|
Primary endpoint measures | Anthropometry: weight, height, body mass index, waist circumference, triceps skinfold thickness, percentage of body fat and fat-free mass by bioelectrical impedance analysis |
Academic achievement | |
Secondary endpoint measures | Attention deficit hyperactivity disorder risk: parents’ and teachers’ report using the Attention Deficit Hyperactivity Disorder Rating Scale-IV |
Motor skills: fine motor skills, throws and catches, and balance (static and dynamic), assessed by the Movement Assessment Battery for Children | |
Health-related quality of life: children’s (by interview) and parents’ (self-administered) report, using the Kiddy-Kindl Questionnaire | |
Sleep quality: parents’ report using the Children’s Sleep Habits Questionnaire, accelerometers, children’s sleep diary | |
Other endpoint measures | Physical activity: parents’ report by the Netherlands Physical Activity Questionnaire, accelerometers |
Potential confounding factors | Age |
Sex | |
Birthweight | |
Breastfeeding: breastfeeding, formula feeding or both (mixed feeding) | |
Food consumption: parents’ report, using the Children’s Eating Habits Questionnaire | |
Family socio-economic status: education, occupation and socio-economic status index | |
Area (urban or rural) | |
Origin (native or foreign) |