Table 2. Meta-analysis results of primary outcomes.

Items	Number of studies	Relative risk	95% confidence interval	P value	I2 (%)	P value for heterogeneity
ARAE	4	2.80	2.12–3.69	<0.001	1.9	0.38
Type of AD
Type A	1	2.25	1.05–4.81	0.04	–	–
Type B	3	2.94	2.05–4.21	<0.001	25.9	0.26
MAE	2	1.86	0.74–4.67	0.19	87.3	0.005
In-hospital mortality	2	2.38	0.39–14.42	0.34	86.0	0.007

AD, aortic dissection; ARAE, aorta-related adverse event; MAE, major adverse event.