Table 2.

Etiology of femoral diaphyseal fractures in relation to age group.

Group/etiology	Falls	Traffic	Others	Total
Group I	8 57.1%	2 14.3%	4 28.6%	14 100.0%
Group II	10 29.4%	18 52.9%	6 17.6%	34 100.0%
Group III	6 23.1%	18 69.2%	2 7.7%	26 100.0%
Group IV	4 18.2%	14 63.6%	4 18.2%	22 100.0%
Total	28 29.2%	52 54.2%	16 16.7%	96 100.0%
Chi-square	7.05	12.16	2.99	13.06
P	0.071	0.006	0.392	0.042

Source: Primary data gathered from medical files at the Joana de Gusmão Children's Hospital between January 2004 and December 2009.