Table 3. The relationships between PLK1 overexpression and clinicopathological significance in gastric cancer patients.

Clinicopathological features	Studies (n)	Patients (n)	Meta-analysis model	OR (95% CI)	P	Heterogeneity
						I2(%)	p
Lymph node metastasis	12	1395	random effects model	1.78(1.13–2.80)	0.013	64.2	0.001
TNM stage	15	1937	random effects model	1.48(1.02-2.15)	0.038	63.6	<0.001
Age	8	1006	random effects model	1.19(0.77-1.84)	0.437	53.2	0.037
Gender	15	1915	fixed effects model	0.87(0.71-1.07)	0.191	23.2	0.197
Tumor histology grade	13	1447	random effects model	1.07(0.66-1.73)	0.783	64.9	0.001
Depth of tumor invasion	12	1405	random effects model	1.70(0.97-2.98)	0.061	78.6	<0.001
Metastasis	5	667	fixed effects model	1.37(0.79-2.37)	0.209	31.9	0.209

TNM: tumor node metastasis.