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.