Design Randomised controlled trial, with blinding of operators and outcome assessors.

Study population English-speaking patients aged 10 or older and parents with capacity to consent were given a 45-minute audio-visual presentation and written information on orthodontic treatment in one of three formats, either leaflets from British Orthodontic Society, generic mind map or blank mind maps.

Data analysis A 30-item closed-ended questionnaire was used to test knowledge of patients and parents before (T0), at 30 minutes (T1) and 6 weeks (T2) after provision of presentation and written information. Questionnaire scores at T0, T1 and T2 were analysed using box plot, histogram and Shapiro-Wilk test.

Results Ninety-three patients and 89 parents were eligible for the study, of which 88 patients (94.6%) and 77 parents (86.5%) have completed questionnaires at T0, T1 and T2. There were no significant differences in scores at T0 between the three groups. After presentation and written information were given, all three participant groups scored higher at T1 and T2. The increase in score was higher in mind map groups.

Conclusions Use of audio-visual presentation and written information has improved information recall of patients and parents. The study suggests that mind maps are a superior format of written information than leaflets.

设计随机对照试验，对操作员和结果评估者无视。

接受研究的年龄在10岁或10岁以上，会说英语的患者以及有父母同意能力的患者，可以进行45分钟的视听演示，并以三种格式中的一种获取有关正畸治疗的书面信息，这些格式可以是英国正畸学会的传单，通用思维导图或空白思维导图。

数据分析在提供陈述和书面信息后，在（T0）之前，30分钟（T1）和6周（T2）时，使用30项封闭式问卷调查测试患者和父母的知识。使用箱形图，直方图和Shapiro-Wilk检验分析T0，T1和T2时的问卷调查得分。

结果共有93位患者和89位父母参加了研究，其中88位患者（94.6％）和77位父母（86.5％）分别在T0，T1和T2完成了问卷。三组之间在T0时得分没有显着差异。演讲并提供书面信息后，所有三个参与者组在T1和T2得分更高。思维导图组的分数增加较高。

结论使用视听演示和书面信息可以改善患者和父母的信息记忆。研究表明，思维导图是比传单更好的书面信息格式。