and 45–65). However, we recognize that these age bands are relatively large, and that there are vast differences within each age band concerning alcohol use. For example, alcohol use at age 18 is riskier and more problematic than at age 29. Thus, we conducted analyses using smaller age bands to further evaluate the developmental G×E effects. Given limitations by sample size, we created six smaller age bands. Specially, we split the “emerging adults” group into two groups: one group (ages 18–21) at or below the legal drinking age and another group (ages 22–29) above the legal drinking age; we further split the “young adulthood” and “middle adulthood” groups into two groups, cut at the middle of the age bands: (30–37 and 38–44 for young adults, 45–55 and 56–65 for middle adults). We note that creation of these smaller age bands is atheoretical and these analyses are exploratory.
