Research article
Ozone pollution and hospital admissions for cardiovascular events
- Multi-city time-series study
- two-stage
- 70 Chinese cities
Authors' conclusion
Ambient ozone was associated with increased hospital admission risk for cardiovascular events. Greater admission risks for cardiovascular events were observed under high ozone pollution days.
Study context
- Population
- Hospital admissions for CV events in 70 Chinese cities of prefecture-level or above, 2015–17
- Participants
- 6,444,441 admissions
- Comparison
- Per 10 μg/m3 increment in 2-day average daily 8 h maximum ozone
- Outcome
- Daily hospital admissions for CV events
Main finding
As reported in the abstract
Hospital admissions for CV events per 10 μg/m3 increment in 2-day average daily 8 h maximum ozone
10 μg/m3 ozone incrementAdmission risk increase (95% CI)
coronary heart disease
0.46%(0.28%–0.64%)
angina pectoris
0.45%(0.13%–0.77%)
acute myocardial infarction (AMI)
0.75%(0.38%–1.13%)
acute coronary syndrome
0.70%(0.41%–1.00%)
heart failure
0.50%(0.24%–0.77%)
stroke
0.40%(0.23%–0.58%)
ischemic stroke
0.41%(0.22%–0.60%)
Per 10 μg/m3 increment in 2-day average daily, as printed
Further findings
| Outcome | excess admission risk (95% CI) |
|---|---|
| Excess admission risk for CV events on high ozone pollution days (2-day average 8-h maximum ≥100 µg/m3 vs < 70 µg/m3) — ≥100 µg/m3 vs < 70 µg/m3 · stroke (lowest) · range across CV events | 3.38% (1.73%–5.06%) |
| Excess admission risk for CV events on high ozone pollution days (2-day average 8-h maximum ≥100 µg/m3 vs < 70 µg/m3) — ≥100 µg/m3 vs < 70 µg/m3 · AMI (highest) · range across CV events | 6.52% (2.92%–10.24%) |
Original publication
Ozone pollution and hospital admissions for cardiovascular events. Eur Heart J. Published 10 March 2023. doi:10.1093/eurheartj/ehad091
Summarised from the published abstract; every number is checked against it