Fracture risk assessment in children with benign bone lesions of long bones

Table 2 Comparison of demographic characteristics between the fracture and non-fracture groups

Characteristic	Fracture group (n = 40)	Non-fracture group (n = 56)	P value
	Mean (SD)	Mean (SD)	Univariate
Age (yr)	8.1 ± 3.6	8.3 ± 3.5	0.77
Sex
Females	24	31	0.65
Males	16	25
Histological diagnosis			0.58
Simple bone cyst	10	15
Aneurysmal bone cyst	7	11
Fibrous dysplasia	8	11
Non-ossifying fibroma	3	8
Langerhans histiocytosis	6	9
Endochondroma	3	1
Osteoblastoma	3	1
Lesion location			0.33
Upper limp	16	17
Lower limp	24	39
Lesion type			0.021
Osteolytic	28	29
Mixed	12	19
Osteoblastic	0	8
Pain			0.004
Severe	12	4
Mild	17	22
None	11	30
Lesion-to-bone width			0.006
Size > 2/3	24	15
1/3 < Size ≤ 2/3	14	30
Size ≤ 1/3	2	10
Axial cortical involvement
> 30 mm	31	24	0.002
30 mm ≥ Size > 20 mm	5	12
≤ 20 mm	4	20

SD: Standard deviation.