Prognostic significance of oligodendrocyte transcription factor 2 expression in glioma patients: A systematic review and meta-analysis

Table 1 Characteristics of included studies

Ref.	Year	Country	Male/All sex	Positive males	Positive females	Median age	Grade I+II/III+IV	Positive I+II/III+IV	Method	HR and 95%CI	HR and 95%CI source	Cut-off	Follow-up time in months	NOS score
Batista et al[15]	2016	Spain	79/152	13	58	-	0+77/75+0	0+12/16+0	IHC	0.98 (0.84-1.15)	Reported	-	50	7
Schäfer et al[16]	2018	Germany	282/471	268	183	50.6	0+111/141+219	0+106/137+208	IHC	2.37 (1.37-4.01)	Reported	10	-	6
Behling et al[17]	2020	Germany	67/113	-	-	64	0/0+113	0/0+89	IHC	1.16 (0.66-2.03)	K-M curve	10	37	7
Zhong et al[18]	2020	China	167/277	60	60	51	0/0+277	0/0+216	IHC	0.66 (0.46-0.94)	K-M curve	10	60	6
Zhou et al[19]	2023	China	49/73	29	13	49.95	0/0+73	0/0+42	IHC	0.11 (0.05-0.65)	K-M curve	30	30	6
Mei et al[20]	2023	China	78/119	-	-	51.1	0/0+119	0/0+74	IHC	0.49 (0.28-0.82)	K-M curve	10	60	7

HR: Hazard ratio; IHC: Immunohistochemistry; K-M: Kaplan-Meier; NOS: Newcastle Ottawa Score.