Beheshteh Malej Afzali; Ebrahim Hajizadeh; Fazlollah Ahmadi; Fazlollah Ghofranipour; Arezo Fallahi
Volume 21, Issue 1 , March and April 2015, , Pages 69-80
Abstract
Background: There is an absence of a valid and reliable tool basedon a field study for predictingfactors related to dental caries in adolescents. Also the lack of preventivemodels of tooth decay has been perceived. The aim of thisstudy was to design preventive models by assessing psychometric properties ...
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Background: There is an absence of a valid and reliable tool basedon a field study for predictingfactors related to dental caries in adolescents. Also the lack of preventivemodels of tooth decay has been perceived. The aim of thisstudy was to design preventive models by assessing psychometric properties of questionnaire of predictive factors for dental caries inadolescents using factor analysis.
Materials and Methods: This descriptive analytical research was done in 2013-14onadolescents who lived in Tehran city.First, model and questionnaire of predictive factors for dental caries in adolescents were designed based on qualitative research using grounded theory. Using systematic samplings,607 studentsand 400 students (12 and 16 years old) were selected for Exploratory Factor Analysis and Confirmatory Factor Analysis respectively. The reliability of the questionnairewas calculated by two different methods: Cronbach'salphaand test-retest. Also, in order to determine the validity of the scale, we used three methods including face validity, content validity, and construct validity. Exploratoryand ConfirmatoryFactorAnalysis were done bySPSS softwareversion 16 and LISLER softwareversion 8.8 respectively. Finally, appropriate models for preventing of tooth decay were presented.
Results: During exploratory factor analysis, eightfactors developed: behavioral factors, fear, social support, motivational beliefs, role of school, instructive elements, socio – economic status, and value of teeth. Results of confirmatory factor analysis showed that the eight-factor model for preventing of dental caries fit Iranian adolescents and the four-factor model isthe strongest predictor of oral health behaviorwhich foresees 76% of behaviors related to oral and dental health.Also test-retest scoreobtained 0.74 and internal consistency was 0.85.
Conclusion:Based on the results of this study, the validity and reliability of the38-item questionnaires of predictive factors for dental caries in adolescents is acceptable and suitable. Therefore the presented models can be used in designing educational programs. Also this tool can be applied in future researches and different groups of students.
Mahin Delara; Fazlollah Ghofranipour; Parviz Azad Fallah
Volume 19, Issue 1 , March and April 2012, , Pages 59-68
Abstract
Background: Decision making for adopting a health behavior is a process involving passing through different stages. This study was conducted to determine the decision making stages based on Precaution Adoption Process Model (PAPM) in female students with premenstrual syndrome (PMS).
Material and Methods: ...
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Background: Decision making for adopting a health behavior is a process involving passing through different stages. This study was conducted to determine the decision making stages based on Precaution Adoption Process Model (PAPM) in female students with premenstrual syndrome (PMS).
Material and Methods: In this quasi-experimental within-subjects study, the PAPM stages were assessed in 317 high school students with PMS, who were exposed to an educational intervention based on PMS concepts. Decision making stages before and after the educational intervention were assessed based on PAPM.
Results: All the participants in pretest assessment were at the stage 0 of decision making. None of them had changed her decision making stage during a one-week posttest assessment. After exposure to educational intervention, about 10.1% were assessed as stage two, 26.8% were in stage three, 1.9% reached stage four, and 61.2% were at stage five. In a regression model, PMS scores could predict 2% of variance in decision making stages. PMS severity and sign interference with social and school performance had a significant correlation with the individual’s decision making stage (p < 0.05).
Conclusion: Adolescent girls with PMS are not in the same stage of decision making after exposure to educational intervention and obtaining the necessary knowledge about PMS. Based on this finding, the design of educational interventions for PMS students must be stage-based. Perceived severity of PMS symptoms and PMS sign interference with school and social activities are among the variables that can be considered as PAPM constructs.