Air Pollution and Blood Clots in Women
Author Information
Author(s): Shih Regina A., Griffin Beth Ann, Salkowski Nicholas, Jewell Adria, Eibner Christine, Bird Chloe E., Liao Duanping, Cushman Mary, Margolis Helene G., Eaton Charles B., Whitsel Eric A.
Primary Institution: RAND Corporation
Hypothesis
Does hormone therapy modify the association of particulate matter air pollution with venous thromboembolism risk in postmenopausal women?
Conclusion
The study found little evidence of an association between air pollution and venous thromboembolism risk among postmenopausal women using hormone therapy.
Supporting Evidence
- 508 participants had venous thromboembolism events during the study.
- The average follow-up period was 7.7 years.
- VTE risk was not significantly associated with PM2.5 or PM10 concentrations.
- Findings were consistent across different PM averaging periods.
- Results were robust to various sensitivity analyses.
Takeaway
This study looked at whether air pollution affects blood clots in women taking hormone therapy, and it found that it doesn't seem to have an effect.
Methodology
The study used Cox proportional hazard models to analyze the association between particulate matter exposure and venous thromboembolism events in a randomized trial of hormone therapy.
Potential Biases
Potential confounding factors related to hormone therapy exposures may affect the results.
Limitations
The study's findings may not be generalizable to men or premenopausal women, and the estimated PM concentrations may not fully represent individual exposures.
Participant Demographics
Postmenopausal women aged 50-79, primarily non-Hispanic white.
Statistical Information
Confidence Interval
0.54–1.60 for PM2.5 and 0.72–1.53 for PM10
Statistical Significance
p > 0.05
Digital Object Identifier (DOI)
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