Table 2. Associations between CXCR4 expression and OS of ovarian cancer grouped by selected factors.

Variables	No. of studies	No. of patients	ES (95% CI)	I2 (%)
Country
Asian	4	268	5.86(2.61–13.17)	32.0
Non-Asian	3	461	0.88(0.58–1.32)	15.8
Stage III–IV (%)
>70	3	220	4.13(2.15–7.92)	8.9
≤70	4	509	1.65(0.59–4.62)	78.7
Subcellular localization
Cytoplasm	2	163	3.25(0.41–25.90)	74.3
Nucleus	2	342	0.74(0.52–1.05)	0.0
Follow-up (mo)
>60	2	289	2.82(0.17–47.01)	92.1
≤60	4	316	3.12(0.83–11.72)	55.2