Table 2.
Major therapeutic characteristics of ICCU admission
| The 2-day average concentration of PM2.5 before ICCU admission | ||||
|---|---|---|---|---|
| Characteristic | ≤36 μg/m3 | 37-63 μg/m3 | ≥64 μg/m3 | P value |
| (N = 804) | (N = 773) | (N = 760) | ||
| Percutaneous coronary intervention | 446(55.5) | 462(59.8) | 433(57.0) | 0.531 |
| Temporary pacemaker | 78(9.7) | 72(9.3) | 60(7.9) | 0.214 |
| Conventional pacemaker | 46(5.7) | 41(5.3) | 24(3.2) | 0.018 |
| ICD | 7(0.9) | 4(0.5) | 4(0.5) | 0.389 |
| CRT-P/D | 3(0.4) | 5(0.6) | 3(0.4) | 0.939 |
| Ablation for tachycardia | 43(5.3) | 20(2.6) | 25(3.3) | 0.030 |
| LAA closure | 16(2.0) | 2(0.3) | 13(1.7) | 0.593 |
| TAVI or BAV | 18(2.2) | 10(1.3) | 23(3.0) | 0.302 |
| Interventional therapy for CHD | 6(0.7) | 8(1.0) | 5(0.7) | 0.856 |
| Intra-aortic balloon pump | 28(3.5) | 32(4.1) | 27(3.6) | 0.932 |
| Inotropes or vasopressors | 90(11.2) | 115(14.9) | 107(14.1) | 0.089 |
| Arterial line | 111(13.8) | 128(16.6) | 168(22.1) | < 0.001 |
| Central venous catheter | 66(8.2) | 74(9.6) | 87(11.4) | 0.031 |
| Hemodialysis | 11(1.4) | 20(2.6) | 28(3.7) | 0.004 |
| Mechanical ventilation | 87(10.8) | 104(13.5) | 125(16.4) | 0.001 |
Data are expressed as counts and percentage
Abbreviation: PM2.5 particulate matter with an aerodynamic diameter less than 2.5 μm, ICD implantable cardioverter defibrillator, CRT-P/D cardiac resynchronization therapy and pacemaker or defibrillator, LAA closure left atrial appendage closure, TAVI transcatheter aortic implantation, BAV balloon aortic valvuloplasty, CHD congenital heart disease