As shown in Table 4b, in Whites, all dichotomous and density measures were significantly associated with early onset of regular drinking. Further, FHDrPSND–AUDMaxSxCnt (b=−3.21) and FHFirst–AUDDx (b=−0.93) presented the most robust associations among density and dichotomous measures respectively. In Blacks, only FHDrPSND–AUDDx (b=−1.61) and FHDrPSND–AUDMaxSxCnt (b=−2.10) density measures presented significant associations with the latter being most robust. Interestingly, all four dichotomous measures failed to present significant associations. Therefore, in both Whites and Blacks, density (vs. dichotomous) were more robust and consistent in their associations with age of onset of regular drinking.
