Abstract
Background The aim of this cross-sectional study was to evaluate the effect of family functioning on oral health related quality of life (OHRQoL) and dental caries status among 4- to 6-year-old Chinese pre-school children in Malaysia. Methodology This study was approved by the institutional Joint Research and Ethics Committee, International Medical University, Malaysia (number 373/2016); consisted of 180 eligible pre-school children from a private school. Study tools included demographic, clinical oral health data form, the Early Childhood Oral Health Impact Scale (ECOHIS) and family functioning-12-item general functioning subscale. Written consent was sought prior to data collection. Data were analysed by SPSS v.22.0; descriptive statistics for socio-demographic details, clinical information, HRQoL and FAD scores. The parametric tests included independent sample t test and ANOVA to evaluate the associations between the dependent variable. Binary logistic regression models were applied to assess the impacts on OHRQoL (P value < 0.05). Results A response rate of 80.5% was achieved. Sample means for FAD-GF12 scores ranged < 2, indicating normal family functioning. The ECOHIS scores mean was 0.52 (SD = 0.68). In the children impact section the highest score of impacts 20 was noted followed by family impact section with the score of 12. It was observed that children with dental caries had a significant (P = 0.014) negative impact on OHRQoL (mean 0.72, SD = 0.50) as compared to children with no caries (mean 0.34 SD = 0.39). The bivariate regression analysis after getting adjusted indicated three predictors associated to poor HRQoL: having two or more siblings (OR = 4.73, P = 0.013), relationship (mother) of the respondent to the child (OR = 2.86, P = 0.013) and having dental caries (OR = 8.12, P <= 0.001). Conclusion Findings of this study indicates that number of siblings, relationship of the respondent to the child and dental caries status are independently associated with health-related quality of life. However, family functioning does not mediate poor HRQoL in association to dental caries.