Cadmium Exposure and Lung Function in Men
Author Information
Author(s): Lampe Brad J., Park Sung Kyun, Robins Thomas, Mukherjee Bhramar, Litonjua Augusto A., Amarasiriwardena Chitra, Weisskopf Marc, Sparrow David, Hu Howard
Primary Institution: Department of Environmental Health Sciences, University of Michigan School of Public Health
Hypothesis
Is there an association between urinary cadmium levels and pulmonary function in community-exposed men?
Conclusion
Chronic cadmium exposure is associated with reduced pulmonary function, and this effect is modified by cigarette smoking.
Supporting Evidence
- A single log-unit increase in urinary cadmium was inversely associated with FEV1 percent predicted.
- Current smokers had a higher geometric mean urinary cadmium and lower FEV1/FVC ratio than former and never smokers.
- The study used mixed-effect models to account for repeated measures of lung function.
- Statistical analysis showed significant trends in lung function decline with increasing urinary cadmium levels.
Takeaway
This study found that men with higher levels of cadmium in their urine had worse lung function, especially if they smoked.
Methodology
The study analyzed 96 men with urinary cadmium measured in 24-hour urine samples and assessed their lung function over multiple time points.
Potential Biases
Potential bias due to the small sample size and lack of data on urinary cotinine levels.
Limitations
The small sample size limits the statistical power, and the study only had one time point of urinary cadmium data per subject.
Participant Demographics
Participants were mostly white men aged 21-80, free of major health issues.
Statistical Information
P-Value
p<0.05
Confidence Interval
95% CI −13.59 to −1.53%
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
Want to read the original?
Access the complete publication on the publisher's website