The serotonin transporter gene and risk for alcohol dependence: a meta-analytic review.
paper
Cited
Public
- Authors
- McHugh, R Kathryn; Hofmann, Stefan G; Asnaani, Anu; Sawyer, Alice T; Otto, Michael W
- Year
- 2010
- Journal
- Drug and alcohol dependence
- PMID
- 20060655
- DOI
- 10.1016/j.drugalcdep.2009.11.017
- PMCID
- PMC2835838
Previous studies have implicated a relationship between particular allelic variations of the serotonin transporter gene (5HTTLPR) and alcohol dependence. To provide a current estimate of the strength of this association, particularly in light of inconsistent results for 5HTTLPR, we conducted a meta-analytic review of the association between 5HTTLPR and a clinical diagnosis of alcohol dependence. Of 145 studies initially identified, 22 (including 8050 participants) met inclusion criteria. Results indicated that there was a significant albeit modest association between alcohol dependence diagnosis and the presence of at least 1 short allele (OR=1.15, 95% CI=1.01, 1.30, p<.05). Slightly more robust results were observed for participants who were homogeneous for the short allele (OR=1.21, 95% CI=1.02, 1.44, p<.05). These results were unrelated to sex and race/ethnicity of participants; however, the effect size was moderated by study sample size and publication year. Additionally, the fail-safe N analysis indicated potential publication bias. Therefore, although our review indicates that there is a significant association between 5HTTLPR and alcohol dependence diagnosis, this result should be interpreted with caution.
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