Table 2.

The main evaluation index—angiographic success rate analysis results (FAS)

Index	Experimental group	Control group	Statistics	P value
Whether the angiography was successful
Number of cases (number of missing)	128 (0)	130 (0)	NA	NA
Yes n (%)	128 (100.00)	130 (100.00)
No n (%)	0 (0.00)	0 (0.00)
	RD (test-control) and 95% CI 0.00 (−0.03 to 0.03)
Whether the catheter was in place
Number of cases (number of missing)	128 (0)	129 (1)	Fisher	1.0000
Yes n (%)	128 (100.00)	129 (99.23)
No n (%)	0 (0.00)	1 (0.77)
	RD (test - control) and 95% CI 0.01 (−0.02 to 0.04)
Whether target vessel imaging was successful
Number of cases (number of missing)	128 (0)	129 (1)	Fisher	1.0000
Yes n (%)	128 (100.00)	129 (99.23)
No n (%)	0 (0.00)	1 (0.77)
	RD (test−control) and 95% CI 0.01 (−0.02 to 0.04)

FAS, full analysis set; RD, rate difference.