Cross-cultural adaptation and validation of the Self-efficacy Scale to Brush Teeth at Night / Adaptação transcultural e validação da escala de autoeficácia para a escovação dentária noturna

Abstract This study aims to perform cross-cultural adaptation and validation of the "Self-efficacy scale to brush teeth at night" with a Brazilian adult population. Translation and cross-cultural adaptation to the Brazilian-Portuguese language were done according to the stages recommended in the literature. Construct validity was carried out by mean of exploratory and confirmatory factorial analysis in a sample of 198 adult subjects. The reliability of the instrument was measured by Alpha and Omega indices. The model was observed to have been established as one-dimensional for all indicators, with explained variance of 85.7%; factorial loads between 0.85 and 0.91; and with communalities between 0.72 and 0.83. The goodness of fit of the model shown by the confirmatory model were between 0.98 and 0.99; with factorial loads between 0.85 and 0.93, and regression values between 0.69 and 0.84, all above the minimum indices established for instrument quality. For reliability, the Alpha and Omega values had identical indices of 0.95 showing high levels of reliability of the model. The G-H index replicability was 0.96, indicating the stability of solution in other contexts and samples. We concluded that all indicators represented excellent evidence of scale validity to measure self-efficacy to brush teeth at night.

Resumo O objetivo deste estudo foi realizar a adaptação transcultural e validação da "Escala de Autoeficácia para escovação dentária noturna" em uma população de adultos brasileiros. A tradução e a adaptação transcultural para a língua portuguesa foram realizadas de acordo com padrões recomendados na literatura. A validade de construto foi realizada por meio de análises fatoriais exploratória e confirmatória em uma amostra de 198 adultos. A confiabilidade do instrumento foi aferida pelos índices Alpha e Ômega. O modelo foi observado como unidimensional para todos os indicadores, com variância explicada de 85,7%, cargas fatoriais entre 0,85 e 0,91 e comunalidades entre 0,72 e 0,83. Os índices de ajuste do modelo apresentados pela análise confirmatória estiveram entre 0,98 e 0,99, com cargas fatoriais entre 0,85 e 0,93 e valores de regressão entre 0,69 e 0,84, indicando a qualidade do instrumento. Para a confiabilidade do instrumento, os valores de Alpha e Ômega apresentaram índices idênticos de 0,95, mostrando altos níveis de confiabilidade do modelo. O índice de replicabilidade G-H foi de 0,96, indicando a estabilidade da solução em outros contextos e amostras. Concluímos que todos os indicadores representaram excelentes evidências de validade da "Escala de Autoeficácia para Escovação Dentária Noturna".

Psychometric properties of Health Literacy in Dentistry scale in an elderly Brazilian population

Abstract This study aimed to assess the reliability and validity of Brazilian-Portuguese versions of the Health Literacy in Dentistry (HeLD) scale in a sample of elderly Brazilian participants. HeLD was initially translated into and cross-culturally adapted to the Brazilian Portuguese language. The reliability and validity of HeLD were then assessed in a sample of 535 non-institutionalized older persons who also completed a questionnaire containing sociodemographic and health information. Data were then randomly separated into two sub-datasets, and Confirmatory Factor Analysis was performed through structural equation modelling, with a maximum likelihood estimate to test the fit of the data to the factor structure of the long-and short-form HeLD (HeLD-29 and HeLD-14) versions of the instrument. The models were compared using the Akaike Information Criterion to assess goodness-of-fit and to determine which models were preferred. Internal consistency of HeLD was evaluated using Cronbach´s coefficient α. Both versions of HeLD were observed to demonstrate high internal reliability (Cronbach´s α ≥ 0.87 for all seven subscales), acceptable convergent (estimates of ≥ 0.50 for AVE and ≥ 0.70 for CR) and discriminant validity. However, the goodness-of-fit of the confirmatory factor analysis models demonstrated satisfactory results only for HeLD-14 subsamples (x2/df = 1.8-2.3; CFI = 0.97-0.98; GFI/NFI = 0.98-0.99; RMSEA = 0.05 and SRMR = 0.03). In conclusion, HeLD-14 was shown to be a reliable and valid instrument to measure oral health literacy in elderly Brazilian participants.

The effect of caries increment on oral health-related quality of life among adolescents in Brazil: a 3-year longitudinal study

Abstract This study aimed to assess the effect of caries increment on Oral Health-related Quality of Life (OHRQoL) of Brazilian adolescents and to evaluate the responsiveness of the Child Perceptions Questionnaire (CPQ11-14) in this group. A population-based sample of 515 Brazilian 12-year-olds from a large city located in the southeast of Brazil was evaluated according to a random multistage sampling design at baseline and 291 at three years follow-up, using the DMFT index and the CPQ11-14 instrument. To evaluate the responsiveness to change, the measures of effect size and longitudinal construct validity were used. It was verified that OHRQoL among adolescents with DMFT increment across the three years worsened significantly (p<0.05) in relation to their counterparts. The effect size varied from small to moderate. The longitudinal construct validity of CPQ11-14 was satisfactory. Caries increment impacted on OHRQoL of adolescents in Brazil. The CPQ11-14 instrument demonstrated acceptable responsiveness properties.