Cognitive deficits as a function of years of alcohol abuse

The present study relates duration of alcohol abuse and degree of cognitive impairment among a population of alcohol dependent subjects (DSM-III). Data on 175 consecutively admitted patients were first examined to empirically establish operational definitions of short-term and long-term alcohol abuse for this population. Five or more consecutive years of alcohol abuse was thus defined by a median split as long-term alcoholism. The next 125 consecutive admissions were subsequently identified as either Short-Term or Long-Term alcoholics according to this criterion. Data gathered from these 125 subjects represented a wide range of neuropsychological measures. Analyses showed that Long-Term alcoholics demonstrated significantly greater cognitive deficits on tasks of psychomotor speed, recent memory, and overall alertness relative to less chronic alcoholics. This pattern occurred independent of age and education. These findings are interpreted in terms of a cognitive typology of alcoholism, and implications for treatment, including aftercare and cognitive remediation techniques, are discussed.