Table 3.
Clinical outcomes
| The 2-day average concentration of PM2.5 before ICCU admission | ||||
|---|---|---|---|---|
| Outcomes | ≤36 μg/m3 | 37-63 μg/m3 | ≥64 μg/m3 | P value |
| (N = 804) | (N = 773) | (N = 760) | ||
| Primary endpoint | 42(5.2) | 56(7.2) | 79(10.4) | < 0.001 |
| DAMA from hospital in ECC | 20(2.5) | 24(3.1) | 39(5.1) | 0.005 |
| DAMA from ICCU in ECC | 15(1.9) | 20(2.6) | 32(4.2) | 0.006 |
| All-cause Death in hospital | 22(2.7) | 32(4.1) | 40(5.3) | 0.011 |
| All-cause death in ICCU | 21(2.6) | 30(3.9) | 33(4.3) | 0.065 |
Data are expressed as median (interquartile) or counts (percentage), as appropriate
Abbreviation: PM2.5 particulate matter with an aerodynamic diameter less than 2.5 μm, DAMA discharge against medical advice, ECC extremely critical condition, define as the composite of circulatory shock, electrical instability requiring emergency interventions, or acute respiratory failure with the need for mechanical ventilation