Development and psychometric properties of a Calcium Intake Questionnaire based on the social cognitive theory (CIQ-SCT) for Iranian women

The Ergonomic Behaviors Evaluation Tool (EBET) based on social cognitive theory for the assembly line workers: development and psychometric assessment

BACKGROUND

Ergonomic behaviors play a crucial role in preventing work-related musculoskeletal disorders (WMSDs). To measure these behaviors, this research aimed to develop and evaluate an ergonomic behaviors tool (EBET) based on the Social Cognitive Theory (SCT) among women workers on assembly lines (WwAL).

METHODS

The study was conducted from December 2022 to January 2023 with a focus on the psychometric assessment of EBET. Initially, a literature review and interviews were carried out to identify crucial concepts and primary items. The questionnaire's validity was evaluated using the Content Validity Ratio (CVR) and the Content Validity Index (CVI). To determine the domains of the tool, construct validity was examined by administering the items to 270 eligible women. The reliability of the tool was assessed using McDonald's Omega coefficient.

RESULTS

From a total of 67 primary items, 50 were confirmed. The study demonstrated good validity with CVR = 0.92 and CVI = 0.97, along with reliable results indicated by McDonald's Omega coefficient of 0.74. The exploratory factor analysis (EFA) revealed ten distinct dimensions: outcome expectations, outcome expectancies, normative beliefs, perceived barriers, social support, observational learning, reinforcement, behavioral skills, self-efficacy, and intention. Together, these dimensions accounted for 66.25% of the variance in the data. Additionally, the confirmatory factor analysis results supported the presence of these ten constructs and demonstrated a satisfactory fit.

CONCLUSIONS

EBET is a dependable and valid instrument for evaluating the ergonomic behaviors of workers, utilizing the principles of SCT. Researchers can employ EBET to gather data and implement suitable training interventions to enhance ergonomic behavior among WwAL. However, it is crucial to recognize that EBET may not encompass all facets of ergonomic behaviors. Therefore, it is imperative for future research to prioritize the evaluation of EBET's suitability among diverse worker populations and to consider additional dimensions of ergonomics to ensure its wider applicability and effectiveness.

Effect of nutrition education intervention to improve dietary diversity practice and nutritional status of the older people: A cluster randomized controlled trial

The growing aging population raises nutrition and health concerns, with malnutrition in the elderly linked to negative health outcomes. Our objective was to implement theory-based nutritional education interventions to improve the nutritional status of the elderly through diversified dietary practices. A cluster randomized controlled trial was conducted from December 1, 2021, to May 30, 2021, among 782 older persons randomly selected from two urban and 12 semi-urban areas in southwest Ethiopia. We used Social cognitive theory (SCT) in guiding the nutritional education intervention. Data were collected using an interviewer-administered questionnaire. The Mini Nutritional Assessment (MNA) tool was used to assess nutritional status, and a qualitative 24-h eating recall was used to evaluate dietary diversity. Difference-in-difference and generalized estimating equation models were used to assess the intervention effect. In total, 720 participants (361 in the intervention group and 359 in the control group) were included for analysis. The mean dietary diversity score differed significantly between the intervention group and the control group (p < .001). According to the multivariable generalized estimating equations model, the intervention group was 7.7 times (AOR = 7.746, 95% CI: 5.012, 11.973) more likely to consume a diverse diet than the control group. The nutrition status of the elderly in the intervention group improved significantly at the end of the intervention (p < .001). SCT-based nutritional education interventions can effectively improve healthy eating and nutritional status. For older adults, with its convenient approach and low cost, SCT should be considered an effective and efficient nutritional education approach for behavior change.

The social-cognitive determinants of calcium intake for preventing osteoporosis in women in Isfahan: A cross-sectional study using path analysis

BACKGROUND

Osteoporosis is a common disease in women over age 45 years. Calcium intake is among the factors that help prevent osteoporosis. Identifying the social-cognitive determinants of calcium intake can have a major role in the development of osteoporosis prevention programs.

MATERIALS AND METHODS

This cross-sectional study was conducted on 400 women aged <50 years from 10 health centers by cluster sampling in Isfahan in 2016. A hypothetical social-cognitive model was assessed using path analysis, and the fit indices and explanatory power of the model were assessed. The constructs, including self-efficacy, outcome expectations, social support, and self-regulation, were taken as the explanatory variables and calcium intake as the criterion variable.

RESULTS

The mean age of the participating women was 34.07 years (standard deviation = 7.99) (range = 19-50), and their mean calcium intake was reported as 909.94 (12. 6) mg/day. The conceptual model was able to explain 73% of the variance in calcium intake and had good fit indices. Self-regulation was identified as the strongest predictor of calcium intake, and outcome expectation was eliminated from the model since it was the weakest explanatory factor of calcium intake.

CONCLUSIONS

The theoretical model of this study is recommended as a suitable framework for the development of targeted osteoporosis prevention interventions.