A series of 10 disaster studies was included in this analysis: 4 mass murder episodes, floods, a tornado, an earthquake, a firestorm, a plane crash into a hotel, and the Oklahoma City terrorist bombing. Initial (ie, index) interviews were completed between 1 and 6 months after the disasters. For 3 disasters, the last follow-up was 1 year postdisaster, and for the remainder, the last follow-up was at 3 years. Table 1 summarizes the characteristics of each of the 10 disasters included in this report, numbers of directly exposed participants in each site, and the timing of interviews relative to the disaster. Four of the 10 disaster studies used volunteer samples. Among the remaining 6 sites, the participation rate among those eligible was 77%. The index sample included 811 directly exposed participants. The follow-up assessment completion rate of the index sample was 88%, but only 86% provided complete predisaster and postdisaster alcohol data (N = 697). The last follow-up was at 1 year for 400 individuals and at 3 years for 297 individuals. The mean number of months from the date of the disaster to the index interviews was 3.4 (SD, 2.2; median, 3; range, 1-12) and to follow-up was 26.1 (SD, 11.1; median, 19; range, 11-48).