ArticleJournal of orthodontic science2026
A validation study of the Malocclusion Impact Questionnaire to measure oral health-related quality of life in young adolescents with malocclusion from four Arabic countries.
Article in Journal of orthodontic science, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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9 authors.
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Abstract
backgroundThe Malocclusion Impact Questionnaire (MIQ) is a validated tool used to assess how malocclusion affects oral health-related quality of life (OHRQoL). This research focused on translating and culturally adapting the MIQ, then validating it in a group of Arab adolescents with malocclusion. MATERIALS AND
methodsFollowing translation per current guidelines, a pilot study with 20 adolescent native Arabic-speakers confirmed the comprehensiveness of the Arabic MIQ (MIQ-AR). The main study included 233 native Arabic-speaking children aged 10-16, who sought initial orthodontic advice. Construct validity was assessed by correlating the total MIQ-AR scale score with responses to global questions. Convergent validity was measured using the Child Perceptions Questionnaire (CPQ
resultsThe MIQ-AR demonstrated high internal consistency with Cronbach's α above 0.90 and exhibited a strong Discrimination Index. A positive, strong, significant correlation between the global questions and the total MIQ-AR score supported the construct validity of the MIQ-AR. Convergent validity was confirmed through positive, strong, and statistically significant correlation between the MIQ-AR total scores and the CPQ
conclusionThe current version of MIQ-AR demonstrates strong psychometric properties in terms of validity and reliability, and appears to be a reliable instrument for assessing the impact of malocclusion on OHRQoL among Arab adolescents. However, these findings should be interpreted with caution, as they may be limited to populations like the study sample. Further testing of the measure is required across a variety of settings and further work should evaluate measurement invariance and responsiveness across countries and more representative community samples.
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