Developmental and etiological patterns of substance use from adolescence to middle age: A longitudinal twin study

Stephanie M. Zellers, William G. Iacono, Matt McGue, Scott Vrieze

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Background: The common liability to addiction framework suggests the tendency to use substances is largely a general heritable liability, but little is known about how expression of liability varies across development. We evaluated average developmental trajectories and covariation underlying commonly used substances using a genetically informative prospective design spanning three decades. Methods: Using a sample of 3762 twins across seven waves of assessment spanning ages 14–40, we modeled these relationships using two complementary approaches: piecewise latent growth and common factor modeling on four measures of alcohol, tobacco, and marijuana use Results: Average use increased across adolescence and either stabilized (alcohol frequency) or declined (all others) in adulthood. Trajectories were heritable (~.35–.75), and genetically correlated with one another (~.40–.80). The random intercepts, centered at age 16, exhibited shared environmental correlations across substances. We found moderate to large phenotypic (rp~.3–.9) and genetic correlations (rg~.3–1) among the longitudinally varying common factors loading on use of each substance at each age. The factor loadings declined with age, reflecting waning influence of common etiology in substance use. Conclusions: Trajectories of substance use were strongly correlated with each other and influenced primarily by genetic and non-shared environment. A heritable common factor accounted for co-occurring substance use from mid-adolescence to mid-adulthood, and greater substance specificity emerged with maturation. These results extend and reinforce prior work examining consumption and problem use, providing new evidence over a broad age range showing that substance use behaviors are influenced by a more general liability in adolescence and specificity increases across development.

Original languageEnglish (US)
Article number109378
JournalDrug and alcohol dependence
Volume233
DOIs
StatePublished - Apr 1 2022

Bibliographical note

Funding Information:
This work was supported by NIH grants DA042755 , DA046413 , AA009367 , MH066140 , DA005147 , DA013240 , DA036216 , AA023974 , DA037904 , and DA038065 . The funding sources contributed to data collection, but not to study design or hypothesis.

Publisher Copyright:
© 2022 Elsevier B.V.

Keywords

  • Alcohol
  • Common factor model
  • Heritability
  • Latent growth model
  • Marijuana
  • Tobacco

PubMed: MeSH publication types

  • Journal Article
  • Research Support, N.I.H., Extramural
  • Twin Study

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