1550 participants were retained for analysis. 1029 participants were married and the remaining 521 were censored. The mixed effects cox regression model of marriage indicated that the variance component associated with the additive genetic and familial environment random effects were 0.05 (SD = 0.22) and 0.28 (SD = 0.53). This corresponds to relative risks of marriage that were 1.25 or 1.70 higher or lower than the baseline hazard rate based on genetic makeup and family environment, respectively.