Table 1. Correlation between the expression level of miR-155 with clinicopathological features.

Clinicopathological features	Low miR-155	High miR-155	Total	P-value
Gender
Male	9	9	18	0.692
Female	2	3	5
Age
≥ 63	6	6	12	0.827
< 62	5	6	11
Location
Sacrum	10	10	20	0.59
Other	1	2	3
Stage
1A + 1B	9	4	13	0.036a
2A + 2B + 3	2	8	10
Origin
Primary origin	8	4	12	0.059
Recurrent origin	3	8	11
Local recurrence
Overall
Yes	5	6	11	0.827
No	6	6	12
Primary origin
Yes	3	0	3	0.157
No	5	4	9
Recurrent origin
Yes	2	6	8	0.782
No	1	2	3
Metastasis
Yes	0	4	4	0.035a
No	11	8	19

The relationships of the high and low expression group of miR-155 with clinicopathological features of chordoma patients were analyzed by chi-squared test.

^aIndicates statistical significance. Statistical significance was defined as a P-value of < 0.05.