According to the principles of item reduction based on original data, a six-item-short form was constructed. A total of 468 participants (aged 15-81) answered the short form together with the long form in a counterbalanced cross-over design, and with two questionnaires concerning self-efficacy and decisional balance in oral health to verify construct validity.
Comparable item characteristics to the original MSI and a high correlation with the long form prove the usefulness of the short form, which was processed by the participants in less than one minute. Low correlations to the other two constructs show discriminant validity.
The new short form of the MSI (MSI-S) can replace the long form, especially in population-based studies with no restrictions on assessment quality but with sufficient time saved to add other variables necessary to explore oral health-related issues.
方法:根据基于原始数据的项目缩减原则,构建了一个六项简短的表格。共有468名参加者(年龄介乎15至81岁)以平衡交叉设计回答短表格和长表格,并用两份关于口腔健康自我效能感和决策平衡的问卷来验证建构效度。
结果:与原始MSI的可比项目特征以及与长形式的高度相关性证明了短形式的有用性,参与者在不到一分钟的时间内完成了处理。与其他两个结构的低相关性显示出判别有效性。
结论:MSI的新短形式(MSI-S)可以代替长形式,特别是在基于人群的研究中,对评估质量没有限制,但节省了足够的时间来添加探索口腔健康相关问题所必需的其他变量。