Oral Health and Society, Faculty of Dentistry, McGill University, Montreal, QC, Canada.
School of Dentistry, University of São Paulo, Ribeirão Preto, Brazil.
Gerodontology. 2020 Sep;37(3):233-243. doi: 10.1111/ger.12477. Epub 2020 Jun 3.
To examine the McGill Denture Satisfaction Questionnaire (MDSQ) in terms of dimensionality, item reduction and construct validity in a binational sample of complete denture wearers.
We conducted secondary analyses of baseline data from two studies on implant-retained overdentures: a quasi-experimental study in the United States (n = 145) and a randomised trial in Brazil (n = 120). All participants wore upper/lower dentures and responded at baseline to the MDSQ items concerning their original mandibular dentures. A putative model of the MDSQ items resulted in two question subsets: (a) overall satisfaction, retention/stability, aesthetics, cleaning, speech and comfort, plus general chewing ability; (b) mastication of specific foods. Analyses focused on the internal consistency of each subset and possible item reduction, using Cronbach's alpha (Cα), inter-item correlation and exploratory factor analysis (EFA).
The 1st subset showed high inter-item correlation for most question combinations and no redundancy (r ≤ .8). An item on cleaning had low correlation, but its removal does not increase internal consistency (Cα ≥ .83). Results were similar for both studies, with EFA showing a single significant factor (namely "overall satisfaction, lower denture") able to explain nearly 54% of the variance. The 2nd subset also shows strong internal consistency (Cα ≥ .95) and inter-item correlation, with a single factor representing 65% of the variation.
This study discloses the reliability and construct validity of the MDSQ for patient-centred evaluation of complete dental prostheses in the edentulous mandible. Findings also support the use of both "overall satisfaction" and "masticatory ability" as summary scores, for improved outcome assessment.
在一项跨国完全义齿佩戴者样本中，从维度、项目减少和结构有效性方面检验麦吉尔义齿满意度问卷（MDSQ）。
我们对两项关于种植体支持覆盖义齿的研究的基线数据进行了二次分析：一项是在美国进行的准实验研究（n=145），另一项是在巴西进行的随机试验（n=120）。所有参与者均佩戴上/下颌义齿，并在基线时对 MDSQ 项目中关于其原始下颌义齿的问题进行了回答。一个假设的 MDSQ 项目模型产生了两个问题子集：（a）总体满意度、固位/稳定性、美观、清洁、言语和舒适度，以及一般咀嚼能力；（b）特定食物的咀嚼。分析重点是每个子集的内部一致性和可能的项目减少，使用 Cronbach's alpha（Cα）、项目间相关性和探索性因子分析（EFA）。
第一个子集对于大多数问题组合具有较高的项目间相关性，并且没有冗余（r≤.8）。一个关于清洁的项目相关性较低，但删除该项目不会增加内部一致性（Cα≥.83）。两个研究的结果相似，EFA 显示出一个单一的显著因子（即“总体满意度，下颌义齿”）能够解释近 54%的方差。第二个子集也表现出较强的内部一致性（Cα≥.95）和项目间相关性，一个单一的因子代表了 65%的变化。
本研究揭示了 MDSQ 在无牙颌下颌患者对全口义齿进行以患者为中心的评估中的可靠性和结构有效性。研究结果还支持使用“总体满意度”和“咀嚼能力”作为综合评分，以提高结果评估的准确性。
