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Does breath carbon monoxide measure nicotine dependence?
Nestor D Kapusta1, Jakob Pietschnig, Paul L Plener
1Department of Psychoanalysis and Psychotherapy, Medical University of Vienna, Vienna, Austria. nestor.kapusta@meduniwien.ac.at
Journal of Addictive Diseases
|October 7, 2010
Summary
Exhaled carbon monoxide (CO) effectively identifies smokers but does not accurately measure nicotine dependence severity. This study shows CO is a good smoking status marker, not a nicotine dependence predictor.
Area of Science:
- Public Health
- Clinical Chemistry
- Addiction Medicine
Background:
- Nicotine dependence is a significant public health concern.
- Accurate assessment of smoking status and dependence is crucial for effective interventions.
- Exhaled carbon monoxide (CO) is a non-invasive biomarker of recent smoking.
Purpose of the Study:
- To evaluate exhaled carbon monoxide (CO) levels as a predictor of smoking heaviness and nicotine dependence.
- To determine the diagnostic accuracy of CO in differentiating smokers from non-smokers and varying levels of nicotine dependence.
Main Methods:
- A cross-sectional study of 1,870 Austrian male military conscripts.
- Assessment of nicotine dependence using the Heaviness of Smoking Index (HSI).
- Measurement of expired breath carbon monoxide (CO) levels and Receiver-Operating Characteristic (ROC) curve analysis.
Main Results:
- Exhaled CO levels effectively discriminate between smokers and non-smokers (AUC, sensitivity 95%, specificity 83% at ≥ 5.5 ppm).
- CO levels did not adequately discriminate between different severity levels of nicotine dependence.
- A CO cut-off of ≥ 5.5 ppm demonstrated optimal discrimination for smoking status.
Conclusions:
- Exhaled carbon monoxide is a valuable and practical biomarker for identifying current smoking status.
- CO levels are not a reliable indicator for assessing the severity of nicotine dependence.
- Further research may explore other biomarkers for nicotine dependence severity.
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