Master's Program in Dentistry, Faculty of Dentistry, Universidad de La Frontera, Temuco, Chile.
Universidad San Sebastián, Facultad de Odontología, Puerto Montt, Chile.
Health Qual Life Outcomes. 2020 May 19;18(1):146. doi: 10.1186/s12955-020-01385-1.
The Malocclusion Impact Questionnaire (MIQ) is a condition-specific measure that assesses the impact of malocclusion on Oral Health-Related Quality of Life (OHRQoL). The aim of this study was to cross-culturally adapt the original version of MIQ into Spanish and to assess the acceptability, reliability and validity of this version in the Chilean population.
The MIQ was cross-culturally adapted for the Spanish language for Chile using recommended standards for the linguistic validation of instruments. To assess its psychometric properties, a cross-sectional study was carried out with 219 children aged 10 to 16 years from public schools in Puerto Montt, Chile, who completed the Chilean versions of the MIQ (MIQ) and the Child Perceptions Questionnaire 11-14 (CPQ). The presence and severity of malocclusions was determined through the Dental Aesthetic Index by a trained dentist. The MIQ was administrated a second time two weeks later. The reliability of the scale was assessed by analysis of its internal consistency (Cronbach's alpha) and reproducibility (Intraclass correlation coefficient - ICC). The validity of the construct was assessed by confirmatory factor analysis and known groups method. Criterion validity was assessed by calculating the Spearman correlation with the CPQ.
The content comparison of the back-translation with the original MIQ showed that all items except two were conceptually and linguistically equivalent. The cognitive debriefing showed a suitable understanding of the Chilean version. The MIQ demonstrated good reliability, with Cronbach's alpha coefficient of 0.85 and ICC of 0.91. A moderate correlation was found between the MIQ and CPQ (0.58). In the known groups comparison, children who felt that their teeth bothered them and/or affected their life obtained significantly higher scores on the MIQ. The OHRQoL was worse when the severity of the malocclusion was greater (p = 0.03).
The results support the applicability, reliability and validity of the Spanish version of MIQ for assessing OHRQoL in Chilean children with malocclusions.
错颌畸形影响问卷（MIQ）是一种专门评估错颌对口腔健康相关生活质量（OHRQoL）影响的指标。本研究的目的是将 MIQ 的原始版本跨文化改编为西班牙语，并评估该版本在智利人群中的可接受性、可靠性和有效性。
使用仪器语言验证的推荐标准，对智利的 MIQ 进行跨文化西班牙语改编。为了评估其心理测量特性，进行了一项横断面研究，纳入了来自智利蓬塔蒙特公立学校的 219 名 10-16 岁的儿童，他们完成了 MIQ（MIQ）和儿童感知问卷 11-14（CPQ）的智利版本。通过受过训练的牙医使用牙科美学指数来确定错颌的存在和严重程度。两周后，对量表进行了第二次管理。通过分析内部一致性（Cronbach's alpha）和可重复性（组内相关系数-ICC）来评估量表的可靠性。通过验证性因子分析和已知群体方法评估结构效度。通过与 CPQ 的 Spearman 相关性评估效标效度。
回译与原始 MIQ 的内容比较表明，除了两个条目之外，所有条目在概念和语言上都是等效的。认知审查表明对智利版本有适当的理解。MIQ 表现出良好的可靠性，Cronbach's alpha 系数为 0.85，ICC 为 0.91。MIQ 与 CPQ 之间存在中度相关性（0.58）。在已知群体比较中，认为自己的牙齿困扰他们和/或影响他们生活的儿童在 MIQ 上的得分显著更高。当错颌严重程度更大时，OHRQoL 更差（p=0.03）。
结果支持 MIQ 西班牙语版本在评估智利有错颌儿童的 OHRQoL 方面的适用性、可靠性和有效性。
