Inflammation and Lung Function Study
Author Information
Author(s): Tricia McKeever, Shiron Saha, Andrew W. Fogarty
Primary Institution: Nottingham Respiratory Biomedical Research Unit, University of Nottingham
Hypothesis
Lung function is inversely associated with systemic white cell count in a population-based study.
Conclusion
Systemic cellular inflammation levels are inversely associated with lung function in a population of both non-smokers and smokers without acute illnesses.
Supporting Evidence
- Higher total white cell count was associated with a 125.3 ml lower FEV1 in non-smokers.
- Granulocytes, mononuclear cells, and lymphocytes also showed similar inverse associations with lung function.
- The study population was well-defined, excluding individuals with recent respiratory illnesses.
Takeaway
This study found that higher levels of inflammation in the body are linked to lower lung function, which means people with more inflammation might have a harder time breathing.
Methodology
Data from the Third National Health and Nutrition Examination Survey (NHANES III) was used, focusing on adults aged 17-90 who did not report recent respiratory illnesses.
Potential Biases
The study may be limited by self-reported smoking history and the exclusion of individuals with recent acute illnesses.
Limitations
The study design does not allow for establishing temporal relationships, and potential confounding by environmental pollution or sub-clinical infections cannot be excluded.
Participant Demographics
The study included 8381 non-smokers and 2790 current smokers, with a mean age of 46.4 years for non-smokers and 41.0 years for smokers.
Statistical Information
P-Value
<0.001
Confidence Interval
95% CI: −163.1 to –87.5 for FEV1
Statistical Significance
p<0.001
Digital Object Identifier (DOI)
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