Researchers split patients undergoing cataract surgery into four groups that were given different informed-consent information. The first group was given conventional verbal information, the second group conventional verbal information plus second-grade reading level brochure, the third group conventional verbal information plus eighth-grade reading level brochure and the fourth group conventional verbal information plus an American Academy of Ophthalmology DVD.
Researchers gave all groups a 12-question questionnaire to test knowledge. Groups two and four scored significantly higher, with average scores of 10.8 and 10.56 respectively. Patients in groups one and three had average scores of 7.68 and 9.08. Researchers also found having had previous cataract surgery and level of education had no effect on the scores.
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