Table 1. Association between the AQP5 expression and clinicopathological characteristics of patients with primary glioblastoma.

Clinicopathological characteristic		Case	Positive expression (case)	Positive rate (%)	χ2	P
Gender	Male	10	8	80.0	2.222	0.136
	Female	10	10	100.0
Age(year)	> 50	14	12	85.7	0.952	0.329
	< = 50	6	6	100.0
KPS score	> 70	9	9	100.0	1.818	0.178
	< = 70	11	9	81.8
Tumor size	> 3 cm	15	15	100.0	6.667	0.010
	< = 3 cm	5	3	60.0
Tumor location	Frontal lobe	6	4	66.7	5.185	0.745
	Temporal lobe	11	11	100.0
	Other parts	3	3	100.0
Tumor excision	Complete excision	4	2	50.0	8.889	0.003
	Partial excision	16	16	100.0

Note: Chi-square test was used for analysis.