Table 1.

Relationships of apelin and clinicopathological characteristics in 120 patients with muscle-invasive bladder cancer.

Feature	All n = 120	Apelin expression		χ 2	P
		Low	High
		n = 40	n = 80
Age (years)				1.406	0.236
<65	67	27	45
≥65	53	13	35
Gender				0.677	0.410
Male	64	24	40
Female	56	17	39
Tumor stage				5.419	0.020∗
T2	40	19	21
T3/T4	80	21	59
Tumor grade				0.944	0.331
Low	38	15	23
High	82	25	57
Lymph node metastasis				0.957	0.328
Yes	37	10	27
No	83	30	53
Recurrence				1.678	0.195
Yes	55	15	40
No	65	25	40
Distant metastasis				5.625	0.018∗
Yes	48	10	38
No	72	30	42
Vascular invasion				4.344	0.037∗
Yes	52	12	40
No	68	28	40

∗ indicates P < 0.05 with statistical significance.