Ambient pollution at hip fracture units and impact on mortality and post-operative delirium: A hormetic effect?
2024

Impact of Air Pollution on Hip Fracture Patients

Sample size: 69461 publication 10 minutes Evidence: moderate

Author Information

Author(s): Uzoigwe Chika Edward, Bin Qadir Rana Muhammad Anss, Daoub Ahmed

Primary Institution: Cardiff and Vale University Health Board

Hypothesis

Does ambient pollution at hip fracture units affect mortality and post-operative delirium?

Conclusion

Higher levels of ambient pollution do not seem to impact mortality for hip fracture patients, but may lower the risk of post-operative delirium.

Supporting Evidence

  • 96% of hip fracture units exceeded WHO PM2.5 limits.
  • 30-day mortality rates were similar regardless of pollution levels.
  • Post-operative delirium was lower in units with higher PM10 and nitrogen dioxide levels.

Takeaway

This study looked at how air pollution affects older patients with hip fractures. It found that while pollution levels are often high, they don't seem to make patients die more, and in some cases, they might even help them avoid confusion after surgery.

Methodology

A cross-sectional observational study using data from the UK National Hip Fracture Database and Defra Data to analyze pollution levels and patient outcomes.

Potential Biases

Potential for residual confounding due to the observational nature of the study.

Limitations

The study is limited to observational data and does not account for individual patient variability or other potential confounding factors.

Participant Demographics

Patients aged 60 years and older with hip fractures treated in hospitals across England and Wales.

Statistical Information

P-Value

p<0.0001

Confidence Interval

CI: 0.89–0.94

Statistical Significance

p<0.0001

Digital Object Identifier (DOI)

10.1371/journal.pone.0315824

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