Table 1.

Association of placental growth factor (PLGF) expression with the clinicopathological features of patients with gallbladder cancer

Variable	Category	Relative PLGF expression		χ2	P‐value
		Low (n = 19)	High (n = 20)
Age, years	<60	7	8	0.410	1.000
	≥60	12	12
Gender	Male	7	6	0.205	.741
	Female	12	14
Tumor size, cm	<3	9	6	1.242	.333
	≥3	10	14
Histological differentiation	Well	3	3	0.005	1.000
	Moderate or poor	16	17
Tumor invasion (AJCC)	Tis‐T2	12	5	5.770	.025 *
	T3‐T4	7	15
Lymph node metastasis (AJCC)	Present	6	14	5.757	.026 *
	Absent	13	6

Bold values indicate statistical significance, *P < .05.