Comparison of Phosphatidylethanol Results to Self-Reported Alcohol Consumption Among Young Injection Drug Users. Our objective is to test the value of phosphatidylethanol (PEth) as a biomarker for alcohol consumption among injecting drug users (IDUs). As part of a longitudinal study of young IDUs, dried blood spots and self-reported alcohol by structured interview were collected at baseline. We compared self-reported alcohol use to detectable PEth (≥8 ng/ml) in the blood spots as well as the relationships between quantitative PEth results and quantity measures of alcohol consumption.
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