Background: Despite the growing number of rural-urban migrant children in China, follow-up observation on the oral health of migrant children is still scarce. This study described the changes of oral health knowledge, behaviors and parental practices in migrant children over a period of one year. Possible factors affecting changes were also investigated. Methods: The study used purposive sampling to select five private schools of migrant children in Guangzhou. A total of 1900 students in Grades 3 and 4 were recruited. A self-administered questionnaire was used in November 2011 to understand their basic situations, including oral health knowledge, behaviors and parental practices. A final survey was conducted in April 2013 to detect any changes. Results: The mean accuracy of oral health knowledge was 53.17% and 59.42% in 2011 and 2013, respectively (p<0.001). For migrant children, the total score of oral hygiene, dietary habits and parental practices increased at the follow-up evaluation (p<0.05). Children with less oral health knowledge were more likely to achieve significantly positive changes in score of knowledge (p<0.001) in the final survey. Migrant children who had worse performance on oral hygiene (beta estimate=0.68, p<0.001), dietary habits (beta estimate=0.58, p<0.001) and good parental practices in the baseline survey were more likely to obtain beneficial changes. No significant associations between demographic characteristics and changes of oral health knowledge and behaviors (p>0.05) were observed. Conclusion: Oral health knowledge, behaviors and parental practices among migrant children significantly improved at the follow-up assessment. However, the overall situation was still poor. Positive and effective health education and prevention programs tailored to rural-urban migrant children with varying levels of oral health knowledge, behaviors and parental practices will be needed. © 2017 The Author(s).

Oral health Behaviors Knowledge Migrant Children parental practices

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