Table 1. Correlations between BDNF-AS expression and clinical parameters in OS patients.

Parameters	n	Low expression	High expression	P
Age (years)
≤18	49	26	23	0.570
>18	65	31	34
Gender
Female	38	18	20	0.691
Male	76	39	37
Enneking stage
I–II	41	15	26	0.032
II B–III	73	42	31
Tumor size
≤8 cm	53	21	32	0.020
>8 cm or discontinuous tumors	61	36	25
Histological grade
G1–G2	68	32	36	0.445
G3–G4	46	25	21