Table 1. Descriptive analysis of student characteristics and the response to questions on students’ role in vaccination promotion according to intervention group. Total Students surveyed, n Reference group Web Video Tri-fold brochure p 421 128 78 105 110 Previous clinical rotations, n / total per group (%) 113/421 (26.8) 38/128 (29.7) 12/78 (15.4) 27/105 (25.7) 36/110 (32.7) 0.051 Female sex, n / total per group (%) 312/421 (74.1) 105 /128 (82.0) 47/78 (60.3) 79/105 (75.2) 81/110 (73.6) 0.007 Students with risk factors*, n / total per group (%) 29/415 (7.0) 9/128 (7.0) 6/77 (7.8) 5/102 (4.9) 9/108 (8.3) 0.641 Students cohabiting with persons with risk factors*, n / total per group (%) 80/416 (19.2) 29/125 (23.0) 14/78 (17.9) 16/103 (15.2) 21/108 (19.1) 122/421 (29.0) 29/128 (22.7) 22/78 (28.2) 33/105 (31.4) 38/110 (34.6) Vaccinated in previous flu seasons^, n / total per group (%) n (%) 0.464 0.215 *Risk factors: Obesity, pregnancy, chronic diseases (respiratory, heart, kidney or liver diseases), neuro- or neuromuscular pathologies, spleen disorders, weakened immune system due to HIV infection or treatment that suppresses the immune system, age ≥ 60 years, and long-term aspirin therapy. ^Vaccinated in previous flu seasons: Vaccinated in ’07, ’08 or 09’ (including either seasonal or pandemic H1N1) seasons. p= Differences according to intervention received were calculated using the Chi-square test.