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BRIEF RESEARCH REPORT article

Front. Epidemiol., 11 January 2023
Sec. Epidemiology of Chronic Diseases and Prevention
Volume 2 - 2022 | https://doi.org/10.3389/fepid.2022.1036631

Reliability and validity of the dutch eating behavior questionnaire in an online format for university students from low-income regions in a pandemic context: A 24 hour MESYN study

Millena Vaz de Carvalho1,2 Antonio Gibran de Almeida Cardoso1,2 Shirley Cunha Feuerstein2 Rosana Rodrigues de Sousa3 Tatiana Sadalla Collese4,5 Francisco Leonardo Torres-Leal3 Marcus Vinicius Nascimento-Ferreira1,6† Augusto Cesar Ferreira De Moraes7*†
  • 1Health, Physical Activity and Behavior Research (HEALTHY-BRA) Group, Universidade Federal do Tocantins, Miracema do Tocantins, Brazil
  • 2Instituto de Ensino Superior do Sul do Maranhão (IESMA/UNISULMA), Imperatriz, Brazil
  • 3Metabolic Diseases, Exercise and Nutrition Research Group (DOMEN), Department of Biophysics and Physiology, Centre for Health Sciences, Federal University of Piaui, Teresina, Brazil
  • 4School of Public Health, University of São Paulo, São Paulo, Brazil
  • 5São Camilo University Center, São Paulo, São Paulo, Brazil
  • 6Youth/Child Cardiovascular Risk and Environmental (YCARE) Research Group, Faculdade de Medicina, Universidade de Sao Paulo, São Paulo, Brazil
  • 7The University of Texas Health Science Center at Houston, School of Public Health Austin Campus, Department of Epidemiology, Human Genetics, and Environmental Science, Michael & Susan Dell Center for Healthy Living, Austin, TX, United States

Objective: To test the reliability and validity of the Dutch Eating Behavior Questionnaire (DEBQ) in an online format in university students from low-income regions.

Methods: We applied the questionnaire to a sample of 195 and 117 university students from a low-income region (Gini index of 0.56) to study validity and reliability, respectively. The DEBQ consists of 33 items on eating behavior in three dimensions/factors: emotional eating, restrained eating and external eating. The questionnaire was administered twice at 2-week intervals. We tested the reliability via temporal stability and internal consistency and construct validity via exploratory and confirmatory factor analysis.

Results: For reliability, we identified an acceptable Spearman correlation coefficient (rho > 0.30 and p < 0.05) and Cronbach's alpha (α ≥ 0.70) for all DEBQ items. In the exploratory analysis, we identified 6 factors representing a mix of original and additional factors, with an explained variance of 69.1%. In the confirmatory analysis with structural equation modeling, we observed better global model adjustment for the 6-factor model with the Tucker–Lewis index and comparative fit index closer to one, as well as root mean square error of approximation closer to zero than the original (3-factor) model. Using generalized structural equation modeling, we also observed a better fit in latent class modeling for the 6-factor model (AIC: 16990.67; BIC. 17874.38) than for the 3-factor model (AIC: 17904.09; BIC: 18342.67).

Conclusion: The online format of the DEBQ has acceptable reliability and validity for measuring eating behavior in university students from low-income regions.

Introduction

Eating behaviors are food choices moderated by consumption trends, personal preferences, specific diets and calorie count (1) and constitute a complex construct that can be influenced by several variables (2). In the university environment, eating behavior seems to be associated with individual factors (e.g., knowledge and perceptions about food), social factors (e.g., peer influence and social norms), environmental factors (e.g., food availability and prices) and academic factors (e.g., campus culture and frequency of academic exams) (3).

The COVID-19 pandemic imposed many restrictive measures aimed at reducing the impact of this disease, and as a result, lifestyles were drastically altered, affecting eating behaviors (2). Epidemiological studies have also been affected, leading to an explosion of nonface-to-face research (4) and tools for the online environment (5). Among the instruments used for the evaluation of eating behavior, the Dutch Eating Behavior Questionnaire (DEBQ) has a consistent psychometric capacity with a robust structure, which provides reliable and valid information in different populations (including adults from different cultures) (610).

Although the adoption of online tools may have reduced economic and logistical costs compared to face-to-face data collection and provided greater potential engagement (5), some methodological challenges should be considered (4, 5, 11). The level of education of the participants and access to the internet may distort recruitment and the ability to respond to online tools, especially in populations with marked socioeconomic and educational differences (4). Thus, although DEBQ is a valid tool for measuring eating behavior (face-to-face and online format), to the best of our knowledge, it has not yet been tested online in low-income regions. In addition, the construct has not been tested in a pandemic context. Considering the assumption that contexts (e.g., different countries) and subgroups can expose the latent factors of a construct, especially in respondents exposed to rapidly changing environments (4) such as that observed in the COVID-19 pandemic, we hypothesized that the DEBQ, in an online format, has acceptable reliability and validity in university students from low-income regions in a pandemic context.

Methods

Study design

This study assessed psychometric properties of the DEBQ: reliability (temporal stability and internal consistency) and validity (construct/structural) (12). The study is part of a multicenter observational longitudinal project entitled 24 hour Movement Behavior and Metabolic Syndrome (24 h-MESYN). The data collection of this study occurred between February and June 2021 in a single research center. Detailed information about the 24 h-MESYN study can be found elsewhere (13).

Ethical aspects

The study followed the ethical principles for research with human beings: i) Declaration of Helsinki, revised in 2008, Seoul, Korea; ii) resolution of CNS 466/12; iii) guidelines for the conduct of research activity during the COVID-19 pandemic (available at https://prp.usp.br/wp-content/uploads/sites/649/2016/05/prp_covid_2.pdf); and iv) guidelines for research in a virtual environment (OFÍCIO CIRCULAR N° 2/2021/CONEP/SECNS/MS). After being invited and agreeing to participate in the study, only students who freely signed the informed consent form (online) participated in the study. The study approval was given by Centro Universitário do Maranhão (UNICEUMA) Human Research Ethics Committee (ID: 4,055,604).

Population, sample and sampling

The population of this project was composed of students enrolled in a higher education institution selected by convenience. The institution is located in a city in the south of the state of Maranhão (Brazil), which has a Gini index of 0.56 (14). In 2020, our based population was 2,225 students enrolled in nine undergraduate programs: Administration, Law, Physical Education, Nursing, Aesthetics and Cosmetics, Physiotherapy, Nutrition, Psychology and Social Work.

The sample size was calculated according to the assumptions of Nascimento-Ferreira (15). The parameters used to calculate the sample size were α of 0.05, β of 0.10 (or power of 90%) and Pearson's correlation coefficient of 0.30 (minimum required for a correlation matrix in a study of exploratory factor analysis) (16). Based on these parameters, we estimated a sample of 85 students for the current study. However, as the 24 h-MESYN project was designed to evaluate the psychometric properties of at least five other subjective tools, we established a total of 342 participants to meet minimum aspects (example: 80.0% power) for all tools tested (13).

Next, we conducted a stratified sampling with the following strata: biological sex (at least 60.0% for the female biological sex), age (at least 25.0% for students up to 20 years of age) and study program (at least minus 60.0% in the health area), based on previous cohorts (17, 18). The potential participants were sampled in the university entrance hall and open areas following health recommendations.

Inclusion and exclusion criteria

We included regularly enrolled students with a minimum age of 18 years who were selected for the study and who signed an informed consent form. We excluded students who did not complete or incorrectly completed the questionnaires. We excluded the students who presented with physical disability or pregnancy from the analysis.

Harmonization of measures

The entire process of data quality was divided into methodology harmonization and fieldwork training. Regarding methodology harmonization and fieldwork training, the researchers participated in training (lasting 20 h of work) to understand the flow of data collection and to become familiar with the questionnaire (13). The training was offered at the institution by the project coordinator (Nascimento-Ferreira). During training, we also reviewed the online version of the questionnaire (13).

Procedures

The first step was carried out in person at the institution's premises. In this step, we explained the project and sent the link via an instant messaging application (WhatsApp) with the informed consent form. In this phase, we carried out the study invitation following national health protocols related to COVID-19 (e.g., wearing face mask, avoiding close contact). In the second step, after signing the online form, the participants answered the questionnaire for the first time (Q1). Here, we sent up to three reminders in the case of electronic questionnaire no response. In the third step, two weeks after the previous step, we resent the link to the same questionnaire, and the participants answered a second time (Q2). The questionnaire was sent to only those who replied to it in Q1. In the latter two steps, our contact was restricted to messaging via WhatsApp.

Study variables

We retrieved all data using subjective tools for biological sex, age, academic course, academic shift and eating behavior.

Instruments

We evaluated eating behavior using the Dutch Eating Behavior Questionnaire (DEBQ) (19), a questionnaire validated in European (6, 7) and Brazilian (20) adults. The 33-item self-report questionnaire is based on three dimensions (or factors): emotional eating (Items 1, 3, 5, 8, 10, 13, 16, 20, 23, 25, 28, 30 and 32), restrained eating (Items 4, 7, 11, 14, 17, 19, 22, 26, 29 and 31) and external eating (Items 2, 6, 9, 12, 15, 18, 21, 24, 27 and 33). The responses were scored on a 5-point Likert scale (never, rarely, sometimes, often and very often). To generate the score of each scale, we first assigned a value from 1 (never) to 5 (very often) for the responses, and then the scores of the items of each dimension were added and the gross value divided by the number of items in the dimension (6). In addition, we retrieved sociodemographic (biological sex and age) and academic (course and academic shift) information. All information was retrieved using an online questionnaire (available at https://forms.gle/L92wXsVaxxfPNgpE8).

Statistical analysis

We conducted all statistical analyses in Stata software (version 15.0, Stata Corporation, College Station, TX, United States), with a statistical significance criterion of 95.0% (p ≤ 0.05). To assess sensitivity, we applied the chi-square goodness-of-fit test. To test reliability, we assessed temporal stability using Spearman's correlation coefficient with cutoff ≥ 0.30 (for acceptable test-retest [Q1 vs. Q2] reliability) (21). In addition, we performed an internal consistency analysis by determining the Cronbach's coefficient alpha for all items and each factor identified in the exploratory analysis using Cronbach's alpha with cutoff ≥ 0.70 (for acceptable internal reliability) (22).

For the validity of the construct, we assessed the questionnaire structure via exploratory and confirmatory factor analysis. In the exploratory analysis, we applied exploratory factor analysis with Varimax rotation (16). We extracted the factors based on the Kaiser rule, with eigenvalues >1 for factor retention (16). Initially, we performed a preliminary analysis to determine whether the data were feasible with the Kaiser‒Meyer‒Olkin test (KMO > 0.50) for sample adequacy and the Bartlett test (p < 0.05 as statistically significant) for sphericity of data (16). In the confirmatory analysis, we employed structural equation modeling (SEM) to test the best factor structure adjustment by comparing the DEBQ original model with the model identified in the exploratory analysis (23, 24), and we employed generalized structural equation modeling (GSEM) to test the best fitting of latent variables (24) (also interpreted as factors or domains). In the SEM, each model was composed of exogenous latent variables and observed exogenous variables in our analysis (24). A latent exogenous variable is determined to be outside the model if paths only originate from it or, equivalently, no path points to it (24), whereas an observed exogenous variable is the observed item reported by the participant (24). Thus, the SEM is more restrictive than the exploratory factor analysis (23). In this sense, all cross loadings were constrained to be zero (23). Thus, to convert the model from exploratory factor analysis to SEM, items loaded into more than one factor were included only in the factor with the greatest factor loading. We compared the models with the likelihood-ratio test (24). The Tucker‒Lewis index (TLI), comparative fit index (CFI), root mean square error of approximation (RMSEA), and standardized root mean squared residual (SRMR) were used to evaluate the quality of the model. The higher TLI and CFI values and lower RMSEA and SRMR values were considered to indicate a better fit (25), and the statistical significance of the likelihood-ratio test was set at p ≤ 0.05. In the GSEM, we assessed latent class models comparing endogenous latent variables (a variable determined by the model) (24). In our analysis, we specified the number (up to one more class than observed in the exploratory factor analysis) of latent classes and then estimated the fit (24). We assessed the model fit using information criteria measures (Akaike information criterion [AIC] and Bayesian information criterion [BIC]) (24).

Results

Of the 342 invited students, we identified a 43.0% prevalence of refusal to participate in the study in Q1, and a 40.0% prevalence in Q2. In this sense, we identified 57.0% of response rate (students who were invited and answered Q1) in the Q1 and 60.0% in the Q2 (students who answered Q1 and Q2). Table 1 shows the description of the sample and sensitivity analysis, according to demographic and academic variables. In both applications, we observed greater participation of female students (Q1 = 74.9% and Q2 = 72.7%), those aged between 21 and 25 years (Q1 = 44.6% and Q2 = 45.7%), those taking a Physical Education academic course (Q1 = 24.0% and Q2 = 24.8%) and those taking night classes (Q1 = 61.3% and Q2 = 62.4%), but with no significant difference that characterized differential bias.

TABLE 1
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Table 1. Sensitivity analysis based on sociodemographic and academic variables.

Table 2 shows the reliability analysis (temporal stability and internal consistency) of the DEBQ. We identified Spearman's correlation coefficient ranging from 0.44 (Item 33) to 0.84 (Item 31). Next, based on the original dimensions of the DEBQ (Q1 vs. Q2), we identified a correlation coefficient of 0.82 for the emotional eating score, 0.89 for restrained eating and 0.70 for external eating (data not shown). In addition, Cronbach's alpha coefficient for DEBQ items ranged from 0.91 to 0.92.

TABLE 2
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Table 2. Reliability of the Dutch Eating Behavior Questionnaire (DEBQ).

Table 3 shows the construct validity (exploratory factor analysis) of the DEBQ. After the data were factored into the exploratory factor analysis (KMO = 0.904; Bartlett's test, p < 0.001), we identified a 6-factor structure for the DEBQ. Of these, three factors were the original (with small variations in factors 1 and 3): Factor 1, emotional eating (Items 1, 3, 5, 8, 10, 13, 16, 20, 23, 25, 27, 28, 30 and 32); Factor 2, eating restrained (Items 4, 7, 11, 14, 17, 19, 22, 26, 29 and 31); and Factor 3, external eating (Items 2, 3, 9, 12, 15, 24 and 33). We identified three additional factors: Factor 4, impulsive eating (Items 2, 3, 6, 8, 9, 18 and 21); Factor 5, nonimpulsive eating (Items 14, 17 and 21); and Factor 6, eating by visual or sentimental influence (Items 18, 27 and 30). The variance explained for these factors was 69.1%. Finally, for this 6-factor structure, we observed Cronbach's alpha values of 0.96 for factor 1, 0.92 for factor 2, 0.82 for factor 3, 0.78 for factor 4, 0.56 for factor 5 and 0.70 for factor 6 (data not shown).

TABLE 3
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Table 3. Validity analysis (exploratory factor analysis) of the Dutch Eating Behavior Questionnaire (DEBQ).

Table 4 shows the construct validity (confirmatory factor analysis) of the DEBQ. In the SEM, we observed better adjustment for the 6-factor model (based on exploratory analysis), with TLI of 0.87, CFI 0.88, RMSEA of 0.076 and SRMR of 0.073 than for the 3-factor model (based on original DEBQ), with TLI of 0.84, CFI 0.85, RMSEA of 0.083 and SRMR of 0.086. In this sense, we also observed that the four added factors were statistically significant (p < 0.001). In the GSEM, we observed that the six-class model has both the smallest AIC (16990.67) and the smallest BIC (17874.38). The same result was observed in the seven-class model; however, by parsimony, the six-class model offered a less complex solution for DEBQ latent class modeling.

TABLE 4
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Table 4. Validity analysis (confirmatory factor analysis) of the Dutch Eating Behavior Questionnaire (DEBQ).

Discussion

During the outbreak of COVID-19, several measures were taken in epidemiology and public health, including the replacement of data collection and face-to-face research by remote data collection (5). The novelty of this study was to test the psychometric properties of a questionnaire to measure the eating behavior construct in university students from low-income regions. The findings of this study showed that the DEBQ (online format) is reliable and valid for measuring this construct remotely. Thus, the questionnaire can be a viable and low-cost tool to study eating behavior under conditions of restricted social contact (as experienced during COVID-19).

Although we observed a significant rejection/refusal rate in face-to-face recruitment (and response to Q1) and in subsequent contacts via social network messages (and responses to Q2), there was no differential bias between the two applications. Methodological studies have observed a high prevalence of rejection/refusal in studies conducted in Latin America (26) and observational studies addressing European university students (18) and Brazilians (17). However, the proportion of rejection is higher at lower socioeconomic levels or in lower income regions, in line with the literature (26). In addition, we attributed the high rejection rate (between applications Q1 and Q2) to the reduced motivation of participants to complete a second questionnaire in a short time (two-week interval). In this regard, recent studies also indicate that socioeconomic and educational conditions may be a limiting factor for access to and adherence to online research in a pandemic context (4, 5). Thus, we recommend that future studies in low-income regions, with applications of online tools, influence the size of the designed sample (26) (especially for male participants aged 26 to 35 years old) and that conduct combined recruitment and participation approaches (e.g., adopt snowball sampling, allow participation via telephone of a relative or colleague, simultaneous reminders via social network, SMS and face-to-face, among others) (5, 27).

Our findings indicated reliability and acceptable validity for the online version of the DEBQ in low-income university students. These findings corroborate the versions adapted to European adults (7, 8, 10, 28) and university students (69) in the face-to-face and online format. All previous questionnaires showed a 3-factor structure. In this sense, we identified the three original factors of DEBQ, emotional eating (with the inclusion of Item 27), restrained eating and external eating (with the inclusion of Item 3 and absence of Items 6 and 27), and three additional factors (labeled impulsive eating, nonimpulsive eating and eating by visual or sentimental influence). The additional factors were mainly grouped by items of the original composition of emotional eating and external eating. However, in terms of global fit values, the 6-factor solution presented a better structure than the original 3-factor solution in low-income university students during the pandemic. There is no clear evidence of the influence or changes caused by the lockdown, social isolation and uncertainty in eating behavior, although adherence to healthy eating habits throughout the COVID-19 pandemic seems to have worsened (2). However, we speculate that external stimuli via traditional media and social networks facilitated access to enticing foods (of high caloric value) via delivery applications and that the restriction of social contact may cause an imbalance in the mechanisms of emotional eating, since it is more related to psychological than nutritional aspects, revealing latent factors of DEBQ in a pandemic context. Thus, this finding suggests that the social detachment resulting from the pandemic exposed the university students to an abrupt change in the environment that may have an effect, even if transitory, on the behavior construct studied (4).

Some limitations of this study should be mentioned. Although our sample was based on diverse parameters (age range, biological sex and academic course) consistent with previous studies (17, 18), the sample design (size and recruitment) does not allow extrapolation of the results of this study beyond the psychometric findings. In this sense, we observed a high rate of rejection/refusal. However, in post hoc analysis, the power of the sample (for the lowest correlation observed = 0.44, Item 33, Table 2) was 99.0% (β = 0.01, one-tailed), surpassing the power adopted in the design of the sample size of 90.0%. Additionally, the research site was selected by convenience, and the sampling process was stratified because the economic and logistical costs of a representative sample would make a methodological study unfeasible (26), in addition to the ethical precepts involved in increasing the recruitment of participants without clear scientific gain (15). Thus, the demographic, economic and academic characteristics present in the chosen institution were sufficient to reproduce the sample diversity present in university students from low-income regions of Brazil (17). Finally, the level of education of the participants may indicate that these university students have a better understanding of the questionnaire, which may result in more accurate responses and distance them from their nonuniversity peers. Further work is needed to evaluate whether this more detailed factor structure adds to DEBQ's ability to identify eating behavior domains during a pandemic via online formats in low-income regions.

Conclusion

The online format of the Dutch Eating Behavior Questionnaire presents acceptable reliability and validity for measuring the eating behavior construct in university students from low-income regions. The questionnaire is a viable and low-cost alternative for application in conditions of social detachment, such as during a pandemic.

Data availability statement

The raw data supporting the conclusions of this article will be made available by the authors, without undue reservation.

Ethics statement

The 24 h-MESYN study was approved by the Research Ethics Committee of Universidade Federal do Tocantins (No 5,161,340) and Centro Universitário do Maranhão (UNICEUMA, No 4,055,604). The latter approval number is specific to the methodological study.

Author contributions

MVC and AGA were responsible for the review of the instruments, data collection and tabulation, and writing of the first version of the article. SCF, RRS, and TSC participated in the design and interpretation of the results and scientific review of the article. FLT-L participated in the study and article design, interpretation of results and supervised scientific writing in all its versions. MVNF and ACFM were responsible for the design and coordination of the study, training of the field team, supervision of data collection and tabulation, interpretation of results, scientific supervision and writing of all versions of the article. All authors contributed to the article and approved the submitted version.

Funding

The 24h-MESYN study design, data collection and analysis were supported by the Brazilian Government from National Counsel of Technological and Scientific Development (CNPq, No. 402391/2021-7) and by the Federal University of Tocantins (PROPESQ Universal No. 088/2022). MVNF received a postdoctoral scholarship from Programa Nacional de Pós-Doutorado/Capes (PNPD/CAPES). ACFM was supported by UTHealth School of Public Health Start-up Funding.

Acknowledgments

We thank the students who kindly contributed to this study.

Conflict of interest

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Publisher's note

All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article, or claim that may be made by its manufacturer, is not guaranteed or endorsed by the publisher.

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Keywords: questionnaire, emotional eating, restrained eating, external eating, psychometric properties, adults, reliability study

Citation: de Carvalho MV, Cardoso Antonio Gibran de Almeida, Feuerstein SC, Sousa Rosana Rodrigues de, Collese TS, Torres-Leal FL, Nascimento-Ferreira MV and De Moraes ACF (2023) Reliability and validity of the dutch eating behavior questionnaire in an online format for university students from low-income regions in a pandemic context: A 24 hour MESYN study. Front. Epidemiol. 2:1036631. doi: 10.3389/fepid.2022.1036631

Received: 7 September 2022; Accepted: 30 November 2022;
Published: 11 January 2023.

Edited by:

Leonie-Helen Bogl, Bern University of Applied Sciences, Switzerland

Reviewed by:

Claudia Hunot-Alexander, University of Guadalajara, Mexico
Sohvi Lommi, University of Helsinki, Finland

© 2023 de Carvalho, Cardoso, Feuerstein, Sousa, Collese, Torres-Leal, Nascimento-Ferreira and De Moraes. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

*Correspondence: Augusto Cesar Ferreira De Moraes Augusto.Cesar.FerreiraDeMoraes@uth.tmc.edu

These authors have contributed equally to this work

Specialty Section: This article was submitted to Epidemiology of Chronic Diseases and Prevention, a section of the journal Frontiers in Epidemiology

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