Background
While it is well known that substance use and gambling overlap, the
degree to which this overlap can be explained by shared risk factors has not
been fully explored. This study aimed to identify common and unique risk
factors for gambling and substance use among young adults.
Methods
Young adults (n=1,019) in a longitudinal
study since college entry were interviewed annually. Past-year frequency of
seven gambling activities was assessed once (Year 5). Structural equation
models evaluated suspected risk factors in two models, one for gambling with
substance use as an intermediary variable, and one for substance use with
gambling as the intermediary variable.
Results
Sixty percent gambled; 6% gambled weekly or more. Examination
of the two structural models supported the existence of significant paths
(a) from two of the five substance use variables (alcohol, drugs) to
gambling frequency, and (b) from gambling frequency to all five substance
use variables. Every risk factor associated with gambling was also
associated with one or more substance use variables. Risk factors common to
gambling and substance use were sex, race/ethnicity, extracurricular
involvement (fraternity/sorority, athletics), impulsive sensation-seeking,
and behavioral dysregulation. Risk factors unique to substance use were
conduct problems, anxiety, and parent’s history of alcohol and
mental health problems.
Conclusions
Gambling and substance use are interrelated, but with incomplete
overlap in their respective risk factors. Results underscore the need for
longitudinal research to elucidate their distinct etiologies.