these factors included age of onset of drinking (both as a linear mesure, and using unordered indicators for the following categories: under 14, 14–15, 16–17, 18, 19, 20, 21, > 21, and lifetime abstention), educational attainment, whether currently employed or not, current marital status (spouse present in the household, or not), and presence of children under the age of 13 in the home.
