Toward a comprehensive developmental model for alcohol use disorders in men

Area of Science:

• Psychiatry
• Genetics
• Developmental Psychology

Background:

• Multiple risk factors for alcohol use (AU) and alcohol use disorders (AUDs) have poorly understood developmental pathways, often originating in childhood.
• Understanding the etiology of AU and AUDs is crucial for developing effective prevention and intervention strategies.

Purpose of the Study:

• To develop an empirical, broad-based developmental model for the etiology of alcohol use and alcohol use disorders in men.
• To identify and analyze key risk factors and their interactions across developmental tiers.

Main Methods:

• Assessed 15 risk factors across four developmental tiers in 1,794 adult male twins.
• Utilized a population-based twin registry from Virginia.
• Developed and tested a comprehensive etiological model for AU and AUDs.

Main Results:

• The best-fitting model explained 39% of the variance in late adolescent alcohol use and 30% of the liability to lifetime AUD symptoms.
• Two primary pathways emerged: externalizing genetic/temperamental factors and familial/social factors.
• Peer group deviance was significant in both pathways; familial/social factors were more influential for AU, while genetic/temperamental factors were more critical for AUDs.

Conclusions:

• Alcohol use and alcohol use disorders in men are complex traits influenced by interacting genetic, family, temperamental, and social factors over developmental time.
• The findings highlight the distinct yet interconnected roles of genetic/temperamental and social influences in the development of AU and AUDs.