Pai Mithun, Rajesh Gururaghavendran, Yellapurkar Shweta
Department of Public Health Dentistry, Manipal College of Dental Sciences, Mangalore, Manipal Academy of Higher Education, Manipal, Karnataka, India.
Department of Oral Pathology and Microbiology, Manipal College of Dental Sciences, Manipal Academy of Higher Education, Mangalore, Karnataka, India.
J Int Soc Prev Community Dent. 2021 Apr 15;11(2):132-137. doi: 10.4103/jispcd.JISPCD_367_20. eCollection 2021 Mar-Apr.
Modified dental beliefs scale (MDBS), the shortened form of the R-DBS, was developed in a multicultural population. The factor structure of MDBS is not explored in an Indian context. The study explores psychometric properties and tests the fit of MDBS in a rural costal adolescent population in a vernacular language.
The cross-sectional analysis was carried out at two randomly selected rural Institutes in Costal Karnataka. Psychometric properties using a questionnaire were assessed. Validity and reliability were assessed by Cronbach's α, split-half reliability, and test-retest analysis. Statistical analysis: Factor analysis with varimax rotation was employed to add a level of statistical precision and assist in the development the instrument. Two models were developed and tested for goodness of fit, root mean square error of approximation, and comparative fit.
The MDBS revealed a Cronbach's α value of 0.76. Split-half reliability and Guttman split-half reliability were found to be 0.86 and 0.86, respectively. Test-retest reliability was found to be 0.74 ( < 0.01). Factor analysis revealed a five-factor solution explaining 67.8% of the variation in the scale. CFA revealed an appropriate goodness of fit for both models with better values for model two with chi-square value was statistically significant and the ratio value (χ/df = 7.8).
The results of the present study indicate that the MDBS is a reliable and valid tool for the present population subset, with good fit for the second model with two separate latent variables.
改良牙科信念量表（MDBS）是R-DBS的简化形式，在多文化人群中开发。尚未在印度背景下探讨MDBS的因子结构。本研究探讨了MDBS的心理测量特性，并测试其在沿海农村青少年人群中使用方言的适配性。
在卡纳塔克邦沿海地区随机选择的两所农村机构进行横断面分析。使用问卷评估心理测量特性。通过克朗巴赫α系数、分半信度和重测分析评估效度和信度。统计分析：采用方差最大化旋转的因子分析以提高统计精度，并协助开发该工具。开发并测试了两个模型的拟合优度、近似均方根误差和比较拟合度。
MDBS的克朗巴赫α系数值为0.76。分半信度和古特曼分半信度分别为0.86和0.86。重测信度为0.74（<0.01）。因子分析显示一个五因子解，解释了量表中67.8%的变异。验证性因子分析显示两个模型的拟合优度都合适，模型二的值更好，卡方值具有统计学意义，比率值（χ/df = 7.8）。
本研究结果表明，MDBS是适用于当前人群子集的可靠有效工具，对具有两个独立潜在变量的第二个模型拟合良好。
