Particulate matter
PM2.5 components and hospital admissions
Open access · cc by · source: Europe PMC
A 10 μg/m³ rise in two-day PM2.5 was linked to about 1.9% more cardiac emergency admissions in 26 US communities.
How this study connects
Role on claims
Each row is a claim on a concept or method page where this paper supports, challenges, or qualifies the statement. Roles are hand-checked — not a model guess.
A seasonal Poisson Medicare analysis (2000–2003) related emergency admissions to PM₂.₅, then meta-regressed effects on particle species-to-mass ratios. Per 10 μg/m³: +1.89% cardiovascular, +2.25% MI and +2.07% respiratory admissions. Composition modified toxicity, so mass alone was incomplete. The series does not include people under 65.
Evidence for the claim as stated.
City hospital series do not agree on which pollutant or lag carries the acute signal. Nicosia finds same-day PM₁₀ for all-cause admissions (0.85% per 10 μg/m³) and lag-1 ozone for cardiovascular admissions (2.91% per 10 ppb) but no overall PM₁₀–respiratory link. Canadian EDs find CO/NO₂ most consistent for cardiac diagnoses and ozone for asthma/COPD, with 3-hour averages null and Edmonton dominating the sample. Medicare finds PM₂.₅ mass plus composition for CVD, MI and respiratory admissions among those 65+. Treating 'time series show pollution raises admissions' as one coefficient hides those splits.
Evidence for the claim as stated.
Open questions
Tensions this paper is part of
From concept pages' “where studies disagree.” Disagreement means the same question; scope means different assays, populations, or outcomes.
City hospital series do not agree on which pollutant or lag carries the acute signal. Nicosia finds same-day PM₁₀ for all-cause admissions (0.85% per 10 μg/m³) and lag-1 ozone for cardiovascular admissions (2.91% per 10 ppb) but no overall PM₁₀–respiratory link. Canadian EDs find CO/NO₂ most consistent for cardiac diagnoses and ozone for asthma/COPD, with 3-hour averages null and Edmonton dominating the sample. Medicare finds PM₂.₅ mass plus composition for CVD, MI and respiratory admissions among those 65+. Treating 'time series show pollution raises admissions' as one coefficient hides those splits.
Discoveries this paper informs or conflicts with
- Particle mass is not the whole story — what the particles are made of changes the risk
This paper informs this development.
Study at a glance
- Design
- Other — Seasonal Poisson time-series of Medicare emergency admissions vs PM2.5 and composition
- N
- N=685716 · 685,716 CVD admissions across 26 US communities (2000–2003); other causes also analyzed
- Population
- Medicare beneficiaries aged ≥65 in 26 US communities
- Outcome
- Cause-specific emergency admissions related to PM2.5 mass and species ratios
Structured fields used in claim comparison tables when every cited study has a complete layer.
Inspect source passages
PM2.5 components and hospital admissions
These passages occur verbatim in the stored paper text. They support the points listed below; they do not verify every statement in the explanation.
685,716 CVD admissions were examined.
Over all 26 communities we examined 685,716 CVD, 121,652 MI, 238,587 CHF, 46,192 diabetes, and 261,449 respiratory related admissions.
A 10 μg/m³ rise in two-day PM2.5 was linked to a 1.89% increase in CVD admissions.
for a 10 μg/m 3 increase in two-day averaged PM 2.5 concentration we found a 1.89% increase (95% CI: 1.34-2.45) in CVD admissions
Key findings
Per 10 μg/m³: +1.89% CVD, +2.25% MI, +2.07% respiratory admissions; composition modified toxicity so mass alone is incomplete.
Methodology
Ran seasonal Poisson time-series of Medicare emergency admissions (2000–2003) against PM2.5, then meta-regressed effects on particle species-to-mass ratios.
Limitations
Does not identify a single causal species or include people under 65.
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