Brief alcohol interventions
As described elsewhere [In-person BAI and computer-based BAI were delivered face-to-face on the ward (i.e. at baseline), and by phone/ mail (i.e. 1 and 3 months after baseline). In-person BAI was primarily delivered by psychologists trained in motivational interviewing [An allocation ratio of 2 (in-person BAI): 2 (computer-based BAI): 1 (assessment only) was used. To prevent study groups from exchanging intervention information, study group allocation rotated weekly over wards.