Alcohol and Alcoholism Advance Access originally published online on June 17, 2009
Alcohol and Alcoholism 2009 44(5):464-467; doi:10.1093/alcalc/agp039
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Preliminary Evaluation of Phosphatidylethanol and Alcohol Consumption in Patients with Liver Disease and Hypertension
1 Center for Drug and Alcohol Programs, Medical University of South Carolina, Charleston, SC 29425, USA
2 Division of General Internal Medicine, Medical University of South Carolina, Charleston, SC 29425, USA
3 Liver Disease and Liver Transplant Service, Medical University of South Carolina, Charleston, SC 29425, USA
4 Department of Medicine, Ralph H. Johnson VA Medical Center, Charleston, SC 29425, USA
* Corresponding author: Center for Drug and Alcohol Programs, PO Box 250861, 67 President Street, Charleston, SC 29425, USA. Tel: +1-843-792-5226; Fax: +1-843-792-7353; E-mail: stewarsh{at}musc.edu
Received 12 February 2009; first review notified 21 April 2009; in revised form 4 May 2009; accepted 26 May 2009; advance access publication 17 June 2009
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Abstract |
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Aims: The goal of this preliminary study was to evaluate the relationship between blood phosphatidylethanol (PEth) and recent drinking in patients with liver disease and hypertension. Methods: Twenty-one patients with liver disease and 21 patients with essential hypertension were recruited at an academic medical center. Alcohol consumption was estimated using validated self-report methods, and blood PEth was measured by HPLC-MS/MS at a contracted laboratory. Nonparametric comparisons were made between abstainers/light drinkers, moderate drinkers consuming between 1 and 3 drinks per day, and those drinking above this level. Regression methods were used to estimate the effects of liver disease, gender, and age on the relationship between PEth and alcohol use, and to estimate the strength of the linear relationship between PEth and drinking. Results: PEth differed significantly between the three drinking groups (P < 0.001). The relationship between PEth and alcohol did not differ between hypertension and liver disease patients (P = 0.696), nor by gender and age. While there was substantial variability between subjects in the PEth concentration given a similar level of reported drinking, the amount of ethanol consumed was strongly associated with the PEth concentration (P < 0.001). Conclusion: Results support PEth measurement by HPLC-MS/MS as a promising marker of past 1- to 2-week moderate to heavy alcohol consumption in patients with and without liver disease. PEth appears useful for differentiating abstinence or light drinking from moderate to heavy consumption, but may have limited utility for differentiating moderate from heavy alcohol use.