Table I.

Association between circ_001569 expression and clinical characteristics in 36 patients with osteosarcoma.

		circ_001569 expression
Clinical characteristic	Total (n=36)	Lower (n=16)	Higher (n=20)	P-value
Sex				0.121
Female	13	8	5
Male	23	8	15
Age, years				0.677
≤18	26	11	15
>18	10	5	5
Site				0.799
Femur	18	7	11
Tibia	10	5	5
Humerus	8	4	4
Distant metastasis				0.009a
Absent	16	11	5
Present	20	5	15
Tumor size, cm				0.221
<5	14	8	6
≥5	22	8	14
TNM stage				0.016a
I–IIA	14	10	4
IIB-III	22	6	16

^aP<0.05.