Table 2.

Summary of literature references of allelic association of 5-HTT promoter with sexual risk behavior

Reference	Population	Co-occurring clinical feature	Mean age (years)	Male (%)	Sample size	Risk allele	Type of study
Hamer (2002)	–	–	–	100	–	S	–
Kogan et al. (2010)	African-American adolescents	–	Wave 1–13.96 Wave 2–16.04	–	185	S	Longitudinal, prospective design
Wood et al., (2014)	–	–	–	38.3	284	S	–
Sales et al. (2014)	African-American adolescent	Depression	18.1	0	254	S	Randomized trial