We conducted a population-based intervention trial to evaluate the effectiveness of a program to prevent home injuries in children. We recruited a population of 1,015 young parent couples. Among those couples, we measured attitudes toward prevention of home injuries to children before and after the intervention. The intervention had limited effectiveness, which was somewhat greater among white-collar families and families with a higher paternal educational level. We found an association between the occurrence of injuries and educational level of the fathers (odds ratio = 1.7 and 1.9 for 6–12 years and <6 years of school completed, respectively, vs ≥13 years).