Data belonging to study "The relationships between children’s motor competence, physical activity, perceived motor competence, physical fitness and weight status in relation to age"

This dataset belongs to our study " The relationships between children’s motor competence, physical activity, perceived motor competence, physical fitness and weight status in relation to age" (10.1371/journal.pone.0278438). 
This study was done to describe the relations between several factors related to motor skill competence, being physical activity, health related fitness, perceived motor competence and weight status. The published data are the final data used for our analyses. Data was collected in children between 4 and 13 years old. Motor skill competence is measured by the 4 Skills Test and the outcome is ' motor lead'  (motor age - calendar age). Perceived Motor Competence is measured with the Pictorial Scale of Perceived Competence (4-8 years old) / Self-Perception Profile for Children (8 - 13 years old). Physical activity is measured as sports participation in minutes per week by use of a questionnaire that is filled in by the parents (4-9 years old) or by children themselves (10-13 years old). Health related fitness is measured by the Eurofit test. A composite score (Fitness_totalscore) is calculated from 8 items (1. Standing long jump 2. Bent arm hang 3. Sit and reach 4. 10x5m shuttle run 5. Plate tapping 6. Sit-ups 7. Handgrip strength 8. Shuttle run test). In 6- and 7-year old children plate tapping and the shuttle run test were not performed.   
Missings were handled by use of a Full Information Maximum Likelihood, as described in our methods section.