In addition to birth year, coded in 5-year intervals, educational attainment, religiosity, and marital history were included among sociodemographic controls variables. For Cohort I, all but marital status were omitted from interview and thus drawn from the 1988–89 questionnaire. Dummy variables for dropping out of and completing high-school were computed with any tertiary education comprising the reference group. Respondents reporting any versus no religion were coded positive for religious affiliation. Weekly or more church attendance was coded from respondent report of frequency of church attendance using a scale ranging from 1 = “more than once a week” to 5 = “rarely”, with 2 = “once a week.” Marital dissolution was not included among control variables because less than 10% of Cohort I reported marital separation or divorce due in part to restrictive Australian divorce laws prior to 1975. Less than 10% of Cohort II also reported marital separation or divorce, although they are relatively young, with dissolution more likely as Cohort II age through their 30s and beyond. For both cohorts, history of never versus ever marrying was instead examined.
