Background <p>Malocclusion is a highly prevalent oral disease in children. It could detrimentally affect their oral health-related quality of life (OHR-QoL). The Malocclusion Impact Scale for Early Childhood (MIS-EC) is a newly developed scale for the assessment of OHR-QoL in this population aged 3–5 years-old. The aim of this study is to translate and validate an Arabic version of the MIS-EC scale (MIS-EC/Ar).</p> Materials and methods <p>Translation and cross-cultural adaptation of the MIS-EC/Ar scale were performed conforming to relevant WHO guidelines. A sample of mothers/caregivers of children aged between 3 and 6 years was recruited (<i>n</i> = 236). Clinical examination of children and assessment of malocclusion were performed before taking MIS-EC/Ar. The internal consistency was assessed using Cronbach’s alpha. Test-retest reliability performed after two weeks (<i>n</i> = 30) employed intraclass correlation coefficient (ICC). Construct validity, including convergent, discriminant, and structural validity, was evaluated in addition to criterion validity.</p> Results <p>MIS-EC/Ar showed good internal consistency (standardized Cronbach’s alpha = 0.797) and excellent test-retest reliability (ICC = 0.929, 95% CI 0.884–0.962). Convergent validity, Spearman correlation coefficients for the MIS-EC/Ar total score with the overall oral health question, was limited (<i>r</i> = 0.159, <i>P</i> &lt; 0.05). Discriminant validity was significant (<i>p</i> &lt; 0.05). Criterion validity was fair (<i>r</i> = 0.298, <i>p</i> = 0.01). Exploratory factor analysis suggested a reduced scale of six items.</p> Conclusions <p>The MIS-EC/Ar is a reliable instrument with good discriminant validity for assessing malocclusion impact on preschool children’s OHR-QoL. Limited convergent validity and altered factor structure suggest cultural adaptation effects.</p>

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Cross-cultural adaptation and validation of the Arabic version of the Malocclusion Impact Scale for Early Childhood (MIS-EC/Ar)

  • Ahmed Kamal El-Motayam,
  • Rim Fathalla,
  • Marwah Salah Abdel-Latif,
  • Iman Ali El-Baraky,
  • Lamia Khairy Gadallah

摘要

Background

Malocclusion is a highly prevalent oral disease in children. It could detrimentally affect their oral health-related quality of life (OHR-QoL). The Malocclusion Impact Scale for Early Childhood (MIS-EC) is a newly developed scale for the assessment of OHR-QoL in this population aged 3–5 years-old. The aim of this study is to translate and validate an Arabic version of the MIS-EC scale (MIS-EC/Ar).

Materials and methods

Translation and cross-cultural adaptation of the MIS-EC/Ar scale were performed conforming to relevant WHO guidelines. A sample of mothers/caregivers of children aged between 3 and 6 years was recruited (n = 236). Clinical examination of children and assessment of malocclusion were performed before taking MIS-EC/Ar. The internal consistency was assessed using Cronbach’s alpha. Test-retest reliability performed after two weeks (n = 30) employed intraclass correlation coefficient (ICC). Construct validity, including convergent, discriminant, and structural validity, was evaluated in addition to criterion validity.

Results

MIS-EC/Ar showed good internal consistency (standardized Cronbach’s alpha = 0.797) and excellent test-retest reliability (ICC = 0.929, 95% CI 0.884–0.962). Convergent validity, Spearman correlation coefficients for the MIS-EC/Ar total score with the overall oral health question, was limited (r = 0.159, P < 0.05). Discriminant validity was significant (p < 0.05). Criterion validity was fair (r = 0.298, p = 0.01). Exploratory factor analysis suggested a reduced scale of six items.

Conclusions

The MIS-EC/Ar is a reliable instrument with good discriminant validity for assessing malocclusion impact on preschool children’s OHR-QoL. Limited convergent validity and altered factor structure suggest cultural adaptation effects.