A study published by Eur J Pediatr in 2013 entitled “Body weight and the medial longitudinal foot arch: high-arched foot, a hidden problem?”, set out to determine the prevalence of hollow (high-arched) and flat foot among primary school children in Cracow, Poland. The study further set out to evaluate the relationship between the type of medial longitudinal arch and degree of fatness. The study took into account data gathered on a sample of 1,115 children between the ages of 3 and 13.
With a fairly even divide of male and female subjects (564 boys and 551 girls), the study found that regardless of gender or age, high-arched foot was found in the majority of subjects. There was a distinct increase in the number of subjects with high-arched foot between 7 and 8 year olds. This condition was also more common in underweight children.
In obese children, the study found high-arched foot was more common in boys than girls. Further, the study found that flat foot was also more common in obese boys than girls.
As a result of the culled data and analysis thereof, the study concluded that flat foot is least frequent in children between the ages of 3 and 13 years old. High arched foot, by contrast, is the most common foot defect among children within the same age parameters regardless of gender.