Table 2. Subgroup analysis of the pooled HRs of overall survival with over-expressed TUG1 in patients with cancer.

Subgroup analysis	No. of studies	No.of patients	Pooled HR (95% CI)		Heterogeneity
			Fix/Random	p Value	I2(%)	p Value
Cancer type
Bladder cancer	2	101	2.98 (1.84,4.83)	< 0.0001	0.0%	0.973
Respiratory system	2	225	0.93 (0.30,2.82)	0.895	92%	0.000
Other system	4	514	2.63 (1.42,4.87)	0.002	72.9%	0.011
Residence region
China	7	793	1.96 (1.12,3.44)	0.018	86.5%	0.000