Table 3.

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

Index	Experimental group	Control group	Statistics	P value
Whether the angiography was successful
Number of cases (number of missing)	128 (0)	129 (0)	NA	NA
Yes n (%)	128 (100.00)	129 (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 (0)	Fisher	1.0000
Yes n (%)	128 (100.00)	128 (99.22)
No n (%)	0 (0.00)	1 (0.78)
	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 (0)	Fisher	1.0000
Yes n (%)	128 (100.00)	128 (99.22)
No n (%)	0 (0.00)	1 (0.78)
	RD (test–control) and 95% CI 0.01 (-0.02, 0.04)

PPS, per-protocol set; RD, rate difference.