Of these accidents, 64 % occur on school grounds
(including playgrounds in school grounds), and 36
% on other playgrounds. In both groups, more boys
than girls injure themselves. Most of the injuries occur
to children in the 7–9 age group. On playgrounds
outside school grounds, the injuries are concentrated
among children in the 3–5 age group, while on school
grounds it is children in the 10–12 age group who top
the statistics.