Table 2. Absolute number of fractures among survivors and siblings by site.

Site	Survivors		Siblings		p-value1
	N	%	N	%
Skull	243	5.3	95	6.3	0.031
Spine	89	2.0	45	3.0
Rib	123	2.7	35	2.3
Upper body2	2504	54.9	897	55.6
Humerus	150	3.3	48	3.2
Radius/ulna	105	2.3	39	2.6
Other upper body	1906	49.3	810	49.8
Lower body3	1532	33.6	481	32.0
Femur/pelvis	161	3.5	34	2.3
Other lower body	1371	30.1	447	29.7
Unclassified4	73	1.6	12	0.8
TOTAL	4564		1565

¹Chi-square statistic

²Includes fractures of the humerus, radius, ulna, scapula, clavicle, carpals, metacarpals, and phalanges of the hand.

³Includes fractures of the pelvis, femur, tibia, fibula, patella, tarsals, metatarsals and phalanges of the foot.

⁴Insufficient information provided by the study participant to determine the site of the fracture.