Table 1.

Comparison of immunohistochemical scores across patient groups sorted by histological subtype or clinical / molecular characteristics

Compared groups	Statistical test used		Result
EZH2
PDSS and MPSS and BPSS	Kruskal-Wallis		P < 0.001
PDSS vs. MPSS	Mann–Whitney		P < 0.001
PDSS vs. BPSS	Mann–Whitney		P = 0.001
MPSS vs. BPSS	Mann–Whitney		NS
H3K27me3
PDSS and MPSS and BPSS	Kruskal-Wallis		P < 0.001
PDSS vs. MPSS	Mann–Whitney		P < 0,001
PDSS vs. BPSS			P = 0.001
MPSS vs. BPSS	Mann–Whitney		NS
Ki-67
PDSS and MPSS and BPSS	1		P < 0.001
PDSS vs. MPSS	Mann–Whitney		P < 0,001
PDSS vs. BPSS	Mann–Whitney		NS
Compared groups	EZH2	Ki-67	H3K27me3
Gender
Male vs. female	NS	NS	NS
Age
≤25 y/o vs. >25 y/o	NS	NS	NS
Location
Central vs. peripheral	NS	NS	NS
Tumor size
<5cm vs. ≥5cm	P < 0.001	NS	P = 0.032
Distant metastasis
Present vs. absent	P < 0.001	P = 0.021	P = 0.003
Fusion gene
SYT-SSX1 vs. SYT-SSX2	NS	NS	NS

(PDSS: poorly differentiated synovial sarcoma; MPSS: monophasic synovial sarcoma; BPSS: biphasic synovial sarcoma; NS: not significant).