Web-based survey data were gathered at eleven assessment waves. The first eight waves were conducted twice per year (fall and spring), whereas Waves 9 and 10 occurred one year after the previous assessment as described previously (Ashenhurst, Harden, Corbin, & Fromme, 2015). A targeted sample of respondents (N = 1,060) were invited to complete a Wave 11 (W11) survey and to provide salivary DNA five years after W10. Only a subset of the original W1–W10 sample was invited for this next phase of the study due to constraints on the possible number of individuals who could be feasibly genotyped due to budgetary constraints. Criteria for invitation to the W11 survey included a) permission to re-contact, b) completion of W1 and at least one other survey. To date, 601 individuals have provided saliva samples.
