In this survey there is an anomalty that only boys aged 4 to 8 use more nutritional supplements than girls of the same age in Canada.
Can someone please explain or interpret this oddity? It is never explained in the source.
I don't know about Canadian's behaviour nor do I know about nutrional supplements for kids.
I guess boys aged 4 to 8 grow not as tall or big as girls at the same age, then the worried moms feed more supplments to their boys. Or perhaps there is some bias in data collection?