Table 2.

Association of osteosarcoma risk with relative leukocyte telomere length dichotomized at the median

		Case n (%)	Control*n (%)	OR† (95% CI)	P
Overall‡	Short	58 (59.2)	35 (50.7)	1.39 (0.70-2.76)	0.67
	Long	40 (40.8)	34 (49.3)	(ref)
Age§
≤15	Short	8 (33.3)	8 (47.1)	0.55 (0.15-1.98)	0.36
	Long	16 (66.7)	9 (52.9)	(ref)
16-30	Short	22 (51.2)	11 (33.3)	2.15 (0.83-5.54)	0.11
	Long	21 (48.8)	22 (66.7)	(ref)
31-45	Short	14 (93.3)	9 (81.8)	2.80 (0.20-40.06)	0.45
	Long	1 (6.7)	2 (18.2)	(ref)
46-77	Short	14 (87.5)	7 (87.5)	1.42 (0.09-23.36)	0.81
	Long	2 (12.5)	1 (12.5)	(ref)
Gender¶
Male	Short	31 (55.4)	22 (57.9)	0.77 (0.32-1.87)	0.56
	Long	25 (44.6)	16 (42.1)	(ref)
Female	Short	27 (64.3)	13 (41.9)	4.35 (1.20-15.74)	0.03
	Long	15 (35.7)	18 (58.1)	(ref)

^†Odds ratio (95% confidence intervals);

^*includes orthopedic controls only from BDISO; ref = referent group;

^‡adjusted for age and gender

^§adjusted for gender;

^¶adjusted for age.