Supplemental Table 1. Subgroup analysis of STEMI patients regarding baseline kidney function.
| Variables | Creatinine ≤ 1.5 mg/dl | Creatinine > 1.5 mg/dl | ||||
| BID ≤ 9 times (N = 110) | BID > 9 times (N = 50) | p | BID ≤ 9 times (N = 29) | BID > 9 times (N = 17) | p | |
| Age (years) | 63 (54-79) | 66 (59-76) | 0.592 | 67 (56-76) | 68 (55-82) | 0.838 |
| Body mass index (kg/m2) | 24.7 (22.4-27.3) | 23.7 (21.9-26.4) | 0.193 | 24.8 (22.3-26.6) | 25.0 (22.2-27.7) | 0.725 |
| Creatinine (mg/dl) | 1 (0.8-1.3) | 0.9 (0.8-1.2) | 0.373 | 1.8 (1.6-2.4) | 2.4 (1.8-2.76) | 0.023 |
| Hemoglobin (g/dl) | 14.5 (12.6-15.5) | 14 (11.9-15.5) | 0.596 | 12.9 (12.4-15.3) | 12.1 (10.5-14.3) | 0.148 |
| CAD risk factors | ||||||
| Male | 80 (72.7) | 33 (66) | 0.455 | 4 (13.8) | 5 (29.4) | 0.258 |
| Current/past smoker | 51 (46.4) | 28 (56) | 0.514 | 15 (51.7) | 5 (29.4) | 0.219 |
| Hypertension | 74 (67.3) | 37 (74) | 0.464 | 21 (72.4) | 13 (76.5) | 1.000 |
| Diabetes | 49 (44.5) | 24 (48) | 0.735 | 14 (48.3) | 9 (52.9) | 1.000 |
| Hyperlipidemia | 31 (28.2) | 11 (22) | 0.560 | 10 (34.5) | 3 (17.6) | 0.315 |
| Known CAD | 14 (12.7) | 9 (18) | 0.467 | 6 (20.7) | 3 (17.6) | 1.000 |
| Previous MI | 6 (5.5) | 3 (6) | 1.000 | 0 (0) | 1 (5.9) | 0.386 |
| Ischemic stroke | 10 (9.1) | 7 (14) | 0.390 | 5 (17.2) | 1 (5.9) | 0.390 |
| Killip class | ||||||
| I | 47 (42.7) | 21 (42) | 1.000 | 10 (34.5) | 3 (17.6) | 0.315 |
| II | 33 (30.0) | 14 (28) | 0.853 | 8 (27.6) | 8 (47.1) | 0.213 |
| III | 7 (6.4) | 6 (12) | 0.229 | 0 (0) | 3 (17.6) | 0.045 |
| IV | 23 (20.9) | 9 (18) | 0.832 | 11 (37.9) | 3 (17.6) | 0.195 |
| Mehran risk score | ||||||
| Hypotension | 23 (20.9) | 9 (18) | 0.832 | 11 (37.9) | 3 (17.6) | 0.195 |
| IABP support | 33 (30.0) | 17 (34) | 0.713 | 6 (20.7) | 5 (29.4) | 0.722 |
| Congestive heart failure | 7 (6.4) | 6 (12) | 0.229 | 0 (0) | 3 (17.6) | 0.045 |
| Age > 75 (years) | 35 (31.8) | 14 (28) | 0.713 | 8 (27.6) | 7 (41.2) | 0.516 |
| Anemia | 31 (28.2) | 15 (30) | 0.852 | 11 (37.9) | 8 (47.1) | 0.757 |
| Procedural characteristics | ||||||
| Numbers of BID performed | 5 (4-7) | 14 (12-18) | < 0.001 | 6 (5-8) | 15 (12-18) | < 0.001 |
| Contrast volume (ml) | 160 (150-200) | 215 (180-285) | < 0.001 | 150 (150-200) | 200 (163-260) | 0.010 |
| Fluoroscopy times (min) | 10.6 (9-13.7) | 20.2 (14.1-26.0) | < 0.001 | 12.2 (8.0-16.5) | 15.8 (12.0-22.9) | 0.026 |
| Door-to-balloon time (min) | 74 (61-106) | 81 (64-115) | 0.178 | 78 (55-150) | 83 (64-131) | 0.690 |
| Trans-femoral approach | 103 (93.6)0 | 41 (82) | 0.043 | 26 (89.7) | 14 (82.4) | 0.655 |
| Thrombus aspiration | 66 (60.0) | 25 (50) | 0.302 | 20 (69.0) | 5 (29.4) | 0.014 |
| Glycoprotein IIb/IIIa inhibitor | 52 (47.3) | 26 (52) | 0.169 | 17 (58.6) | 11 (64.7) | 0.761 |
| IABP support | 0 (0) | 0 (0) | - | 5 (17.2) | 4 (23.5) | 0.707 |
| Multiple-vessel disease | 70 (63.6) | 43 (86) | 0.005 | 23 (79.3) | 14 (82.4) | 1.000 |
| Infarct-related artery | ||||||
| LAD | 59 (53.6) | 22 (44) | 0.307 | 8 (27.6) | 7 (41.2) | 0.516 |
| LM | 0 (0) | 0 (0) | - | 0 (0) | 1 (5.9) | 0.370 |
| Stent implantation# | 95 (86.4) | 49 (98) | 23 (79.3) | 16 (94.1) | 0.234 | |
| Bare-metal stent | 89 (80.9) | 41 (82) | 1.000 | 21 (72.4) | 15 (88.2) | 0.282 |
| Drug-eluting stent | 6 (5.5) | 8 (16) | 0.058 | 2 (6.9) | 1 (5.9) | 1.000 |
| Number of stent implantations | ||||||
| 1 | 77 (70.0) | 16 (32) | < 0.001 | 18 (62.1) | 6 (35.3) | 0.126 |
| 2 | 17 (15.5) | 22 (44) | < 0.001 | 5 (17.2) | 5 (29.4) | 0.462 |
| 3 | 1 (0.9) | 9 (18) | < 0.001 | 0 (0) | 4 (23.5) | 0.015 |
| 4 | 0 (0) | 2 (4) | < 0.001 | 0 (0) | 1 (5.9) | 0.370 |
| Initial TIMI flow | ||||||
| 0 | 82 (74.5) | 31 (62) | 0.134 | 24 (82.8) | 8 (47.1) | 0.019 |
| 1 | 7 (6.4) | 3 (6) | 1.000 | 1 (3.4) | 4 (23.5) | 0.055 |
| 2~3 | 21 (19.1) | 16 (32) | 0.104 | 3 (10.3) | 5 (29.4) | 0.125 |
| Final TIMI flow | ||||||
| 0 | 2 (1.8) | 0 (0) | 1.000 | 1 (3.4) | 0 (0) | 1.000 |
| 1 | 1 (0.9) | 0 (0) | 1.000 | 1 (3.4) | 0 (0) | 1.000 |
| 2~3 | 107 (97.3) | 50 (100) | 0.553 | 27 (93.1) | 17 (100.0) | 0.294 |
| PCI to non-IRA | 2 (1.8) | 3 (6) | 0.177 | 1 (3.4) | 0 (0) | 1.000 |
| Heavy calcification of IRA | 21 (19.1) | 5 (10) | 0.172 | 2 (6.9) | 5 (29.4) | 0.086 |
| IRA lesion > 20 mm | 93 (84.5) | 43 (86) | 1.000 | 22 (75.9) | 15 (88.2) | 0.690 |
| Bifurcation lesion of IRA | 72 (65.5) | 34 (68) | 0.453 | 17 (58.6) | 11 (64.7) | 0.578 |
| Side branch > 1.5 mm | 48 (43.6) | 27 (54) | 6 (20.7) | 6 (35.3) | ||
| Side branch < 1.5 mm | 24 (21.8) | 7 (14) | 11 (37.9) | 5 (29.4) | ||
| Periprocedural complications | ||||||
| Any dissection | 52 (47.3) | 26 (52) | 0.612 | 17 (58.6) | 10 (58.8) | 1.000 |
| Type D dissection | 3 (2.7) | 3 (6) | 0.378 | 4 (13.8) | 2 (11.8) | 1.000 |
| Type F dissection | 8 (7.3) | 5 (10) | 0.546 | 4 (13.8) | 1 (5.9) | 0.635 |
| Outcome | ||||||
| CIAKI | 5 (4.5) | 7 (14) | 0.052 | 3 (10.3) | 6 (35.3) | 0.058 |