Predictive value of MCV for hazardous drinking in the community

Area of Science:

• Clinical Biochemistry
• Addiction Medicine
• General Practice

Background:

• General practitioners (GPs) often do not investigate borderline elevated Mean Corpuscular Volume (MCV) levels.
• There is a known association between MCV and alcohol abuse.
• Previous literature lacked studies on the predictive value of MCV for hazardous drinking in community settings.

Purpose of the Study:

• To determine the predictive value of MCV for identifying hazardous drinking in a community sample.
• To establish an optimal MCV threshold for detecting hazardous alcohol consumption.

Main Methods:

• A study was conducted on a random sample of 338 adults in a regional Australian city.
• Participants' MCV levels were analyzed, and self-reported hazardous drinking was assessed.
• Statistical analysis was used to determine the sensitivity and specificity of different MCV cut-offs.

Main Results:

• Twenty-nine participants (8.6%) admitted to hazardous drinking.
• An MCV threshold of > 94 fl identified 35% of hazardous drinkers while misclassifying only 6% of non-hazardous drinkers.
• The predictive value of MCV > 94 fl for hazardous drinking was significantly higher in males (67%).

Conclusions:

• Elevated MCV levels, specifically > 94 fl, can serve as an effective screening tool for hazardous drinking in primary care.
• Routine inquiry into MCV levels above this threshold can help GPs identify a substantial proportion of adults engaging in hazardous alcohol consumption.
• This finding supports the integration of MCV screening into routine general practice for early detection of alcohol-related issues.