Table 2. Brachyury immunohistochemical staining scores in different groups of chordomas.

	0	1+	2+	3+	P value
Gender
Male	13	22	11	10	0.69
Female	4	6	4	4
Location
Mobilespine	9	7	2	3	0.03
Sacrum	6	16	10	10
Prognosis
Survival	6	10	6	5	0.84
Nonsurvival	9	12	6	7
Age
subgroup 1: <45	3	3	1	1	0.41*
subgroup 2: 45-60	4	4	6	2	0.80#
subgroup 3: >60	4	9	3	6	0.28&
Disease status
subgroup 1: Primary	6	12	3	8	0.69*
subgroup 2: Recurrence	10	15	9	7	0.50#
subgroup 3: Metastasis	3	2	3	0	0.37&

^*indicates the P value of subgroup 1 v.s. subgroup 2

^#indicates the P value of subgroup 2 v.s. subgroup 3

^&indicates the P value of subgroup 1 v.s. subgroup 3