However, the present study was based on public use data, which did not include all the original respondents due to a subsampling step used in the disclosure protection procedures. The pooled data across the four surveys resulted in a total of 220,816 respondents. Of these, 136,163 were current drinkers (had at least one drink in the past year) ages 12 and over. Excluding 2,932 current drinkers who had missing data for the DSM-IV symptom criteria questions (2.2 percent) yielded a final study sample of 133,231 current drinkers (64,900 males and 68,331 females; 16,526 Hispanics; 94,519 non-Hispanic Whites; 13,475 non-Hispanic Blacks; 1,698 non-Hispanic Natives/Alaskans; 516 non-Hispanic Hawaiian/Pacific Islanders [PIs]; 3,415 Non-Hispanic Asians; and 3,082 non-Hispanic others).
