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Article

Adherence to Mediterranean Diet among Lebanese University Students

by
Joanne Karam
1,2,
Maria del Mar Bibiloni
1,
Mireille Serhan
3 and
Josep A. Tur
1,*
1
Research Group on Community Nutrition and Oxidative Stress, University of Balearic Islands-IUNICS, IDISBA & CIBEROBN (Physiopathology of Obesity and Nutrition CB12/03/30038), E-07122 Palma de Mallorca, Spain
2
Nutrition & Dietetics Department, Modern University for Business & Science, Damour 5660, Lebanon
3
Faculty of Health Sciences, University of Balamand, Balamand Al Kurah 3843, Lebanon
*
Author to whom correspondence should be addressed.
Nutrients 2021, 13(4), 1264; https://doi.org/10.3390/nu13041264
Submission received: 15 February 2021 / Revised: 11 March 2021 / Accepted: 9 April 2021 / Published: 12 April 2021
(This article belongs to the Section Nutrition and Public Health)
Versions Notes

Abstract

:
Scarce studies described eating habits and diet quality among university students in Lebanon. The aim of this study is to assess the rate of adherence to the Mediterranean diet (MedDiet) among Lebanese university students. A cross-sectional nutritional survey was carried out on 525 students (53% men, 18–25 years old) from the University of Balamand, Lebanon. Adherence to the MedDiet was assessed using a validated 14-item MedDiet adherence score. Mean adherence to the MedDiet was 7.96 (standard deviation 2.2), and it was adequate in 59% of participants. Adherence to the MedDiet was higher in older students and nonsmokers. Legumes, vegetables, fruits, and nuts were consumed according to the MedDiet standards among a minimum of 48.4% and a maximum of 69.5% of participants. Chicken, turkey, or rabbit was preferred by 66.9% of participants instead of beef, pork, hamburgers, or sausages; however, just 56.2% of participants showed adequate intake of red meat, hamburger, or meat products. Only 28.8% of them referred to an adequate intake of fish or shellfish. Most of the participants (86.3%) used olive oil as the main added fat, and 67.2% reported a low intake of butter and derivatives. Sofrito was also very usual among participants (79.6%). Only half of the studied sample reported an adequate intake of sweet or carbonated beverages and commercial sweets or pastries. Among the assessed sample, half the participants showed adequate adherence to the MedDiet; however, the mean of adherence among the sample is low.

1. Introduction

In Lebanon, the prevalence of overweight and obesity has attained alarming rates in adults, adolescents, and children due to an energy-dense diet and lack of physical activity [1]. According to a systematic review, high adherence to the Mediterranean diet (MedDiet) was significantly related to less overweight and more weight loss [2]. The benefits of the MedDiet may be due to the synergistic combination of a balanced ratio of n-6 and n-3 essential fatty acids, high amounts of dietary fibers, high oleic acid, and polyphenols consumption [3]. Non-nutritional aspects, linked in one way or another to food consumption, have been suggested to contribute to the beneficial effect of the MedDiet; these include physical activity, consumption of fresh and local products, and eating in groups. It is important to assess the degree of adherence to the MedDiet through accurate measurement tools such as dietary scores [4]. Poor adherence to MedDiet has been found among the Lebanese adult population [5]. Directing governments’ political actions toward spreading adherence to the MedDiet’s principles as much as possible among the population could help to tackle the obesity epidemic [6].
The university phase may be the first phase of life when most teenagers start making their own food choices along with other choices. Dietary habits of young adults are affected by the fast-food market; this is reflected by increased overweight and obesity among this age group [7]. However, universities may provide an ideal forum for reaching out to many young adults through nutrition education programs that may positively influence students’ eating habits [7].
Scarce studies described eating habits among university students in Lebanon [7]. No study was found assessing adherence to MedDiet among this age group. Health in old age is related to health in earlier years of life [8]. The aim of this study was to assess the adherence to MedDiet among Lebanese university students.

2. Methods

2.1. Study Population

This is a cross-sectional study carried out 8 on 525 students (53% men) from three different campuses of the University of Balamand in Lebanon (Faculty of Health Sciences, Beirut; ALBA, Sin el Fil and Main campus, Koura). They were asked to answer by themselves a questionnaire in the presence of the interviewer to help in any clarification needed. The study was conducted according to the guidelines laid down in the Declaration of Helsinki, and all procedures were approved by the Balamand University Ethics Committee (approval reference 1.2019). Written informed consent was obtained from all participants.

2.2. Assessment of Adherence to the Mediterranean Diet

The questionnaire was divided into two parts—non-nutritional general information (sex, age, working status, smoking status, willingness to change diet) and nutritional information made by measurement of the adherence to MedDiet (assessed using a 14-item MedDiet adherence score, developed by the Prevención con Dieta Mediterránea (PREDIMED) consortium for immediate feedback [9,10]). The score of adherence was calculated by summing the points of the 14 questions (“Yes” answer was one point, “No” was zero points; the resulting score ranged from 0 to 14). The higher the score was, the greater the adherence to the Mediterranean diet. This questionnaire has been adapted to and validated for the Spanish population [11] and then adapted in an English version to be implemented in other populations [12]. This questionnaire has been used also in samples of young adults [13].

2.3. Statistics

Statistics were performed using the SPSS statistical software package version 25.0 (SPSS Inc., Chicago, IL, USA). Data were tested for normality using the nonparametric test Kolmogorov–Smirnov test on SPSS. Results are shown as mean and standard deviation (SD) for normally distributed data, and median and interquartile range (IQR) in the case of non-normal distribution. Nonparametric tests (chi-square test, Mann–Whitney U-test, or Kruskal–Wallis test) were used when the sample was not normally distributed. Results were considered significant if p-value < 0.05.

3. Results

The mean MedDiet adherence score was 8.0 (±SD 2.2) with no difference between genders (Table 1). MedDiet adherence score was higher the older the student was (18–21 years old: 7.8 ± 2.2; 22–25 years old: 8.2 ± 2.0). On non-nutritional background, students who worked in parallel showed higher results of MedDiet adherence score (8.4 ± 2.1) than those that only studied (7.9 ± 2.2), and nonsmokers (8.1 ± 2.1) also showed higher scores than smokers (7.7 ± 2.3). Higher adherence was found among students with a willingness to change diet.
Table 2 shows stratification of adherence to MedDiet items. On nutritional background, legumes, vegetables, fruits, and nuts were consumed according to the MedDiet standards among a minimum of 48.4% and a maximum of 69.5% of participants. Chicken, turkey, or rabbit was preferred by 66.9% of participants instead of beef, pork, hamburgers, or sausages; however, just 56.2% of participants showed adequate intake of red meat, hamburger, or meat products. Furthermore, only 28.8% of them referred to an adequate intake of fish or shellfish. Most of the participants (86.3%) used olive oil as the main added fat, and 67.2% reported a low intake of butter and derivatives. Consumption of sofrito, which is a sauce made with olive oil, onion, garlic, and tomato, was also very usual among participants (79.6%). Only half of the studied sample reported an adequate intake of sweet or carbonated beverages (51.8%) and commercial sweets or pastries (not homemade) (50.7%). Men consumed more fish, nuts, and chicken, turkey, or rabbit than women; and women consumed more vegetables and sofrito than men.
Table 3 shows adequacy of adherence to MedDiet according to different variables. An adequate MedDiet adherence score (≥9) was observed in 59% of the participants. The highest percentage of inadequate MedDiet adherence score was found among students that are only devoted to their study. Other items showed a similar percentage of adherence to the adequacy of the MedDiet.

4. Discussion

The mean adherence to the MedDiet among Lebanese students was discrete (7.96 out of 14) but lower than adequate adherence score (≥9: healthy score to prevent cardiovascular diseases (CVD)) even though half of the studied population showed adequate adherence to the MedDiet [14,15]. No difference was observed among genders, unlike other studies among Lebanese university students showing a higher adherence to Lebanese MedDiet among women [16] and higher consumption of westernized diet among men [17].
The 14-point questionnaire to assess the adherence to the MedDiet was used by the PREDIMED group for immediate feedback in Spain [9,10], UK [11], and Greece [13]; it was also used as well to assess people at high risk of CVD, in 18–75-year-old German women [18] and in heart or lung transplant recipients aged ≥16 years old in Manchester [19]. The mean MedDiet adherence score estimated among those in high risk of CVD patients (5.47) [9,10], heart or lung transplant recipients (6.6) [19], and current Lebanese students was higher than those observed in Lebanese adults (4.2) estimated on a 10-point scale based on above and below median levels of consumption [5].
Adherence to MedDiet was higher the older the student was, similarly to previous results obtained in other Mediterranean populations [20]. Men (7.99) had a very slightly higher and not different MedDiet adherence score than women (7.92), similar to a study previously conducted in <30-year-old Lebanese adults [5] and another study developed in Spain among nondiabetic and diabetic males and females [21].
When non-nutritional outcomes were assessed, current Lebanese nonsmokers showed higher mean MedDiet adherence score and higher adequate score than smokers, as shown by several previous studies smoking and a healthier diet are correlated and often occur together as part of overall lifestyle patterns [22]. Students primarily worried about their health (around 30% of participants) also showed better adherence, which is quite similar to other Mediterranean students, whose better adherence was associated with better self-rated health [23]. This should be taken into consideration in planning strategies to increase the level of adherence to the MedDiet for students to make them aware of the major role of dietary habits in health.
Stratification of nutritional outcomes of the questionnaire revealed a relatively high spread of usage of olive oil in cooking (86.3%) although only 50.3% consume more than four teaspoons per day. The percentage of participants consuming food according to the MedDiet standards was higher than 50%, except for wine and fish. The consumption of olive oil and fish should be more widespread among students. This stratification revealed slight differences in the eating habits between men and women, unlike another study conducted among university students in Lebanon [7].
Moreover, a higher percentage of participants in this study answered “Yes” to questions Q3 (vegetables), Q4 (fruits), Q9 (legumes), Q14 (cooking with olive oil, onion, garlic, and tomato) than a study on coronary artery disease study [22]. In both studies, less than 50% of participants showed an adequate intake of wine conforming to MedDiet standards, but fish and fish products’ intake differed greatly between both studies; moreover, 28.8% of university students answered “Yes,” compared to 59% in a coronary artery disease study [24]. The low consumption of fish confirms the outcome of previous studies showing a low consumption of fish among the adult population living in Beirut, Lebanon [5,25]. To cook with olive oil, onion, garlic, and tomato is very usual among Mediterranean people since they are the ingredients of a typical Mediterranean sauce, which is a key component of the MedDiet and strongly associated with reduced risk of CVD mainly due to its phenolic, polyphenols, and carotenoids contents [25]. Lebanese population showed an alarming increase in nutrition-related CVD risk factors [26]. This should alert in applying strategies at both individual and community level to promote healthy dietary and lifestyle habits. Accordingly, the high consumption of the Mediterranean diet, which has been shown to protect from cardiovascular diseases (CVD) prognosis, diabetes, mortality, cancer, obesity, grant favorable health status, better biochemical profile, influence positively the quality of life the academic performance, the muscular fitness and mental health [27,28,29,30,31,32,33,34,35,36,37,38,39,40,41], may be a good way to implement healthy dietary habits, which would be easier to implement if they are joined to good sensory characteristics [42] and within the context of a healthy MedDiet.
The analysis of the adherence to MedDiet according to non-nutritional outcomes showed that the worst scores were found in current Lebanese students with political problems, economy, and future as main worrying issues (59.4% of all worrying issues). Indeed, the Lebanese state is in bad conditions, plagued by several chronic problems that include a long-lasting political vacuum, a major burden of millions of refugees, and the ongoing revolution against the state since October 2019. Lebanon ranks 73rd in the world by nominal gross domestic product (GDP) per capita (USD 8778) [43]. Lebanon also showed a human development index (HDI) value of 0.730 for 2018, which put the country in the category 93 of 189 countries and territories [44]. Therefore, it is not surprising the expressed main worry among Lebanese students and those who showed lower adherence and interest in improving their dietary pattern. Health as the main worrying issue was declared by 28.6% of students, and 50% of those showed inadequate adherence to the MedDiet. Accordingly, most of the students declared a clear willingness to change diet, which could be understood to improve their health status. In all cases, improving the dietary pattern of the Lebanese population will positively contribute to increasing public health in this country and improve the national situation, as recommended by the World Health Organization who urged promoting lifestyles including healthy diets [45].

Strengths and Limitations

MedDiet has been assessed in Lebanon, and it should be taken into consideration in planning strategies to increase the public health nutrition among the Lebanese young population. This study has also several limitations that must be acknowledged. First, the applied questionnaire of MedDiet adherence score was validated for the Spanish population, but it was not validated in Lebanese students yet before conducting this investigation; however, it has been adapted to an English version and used in other samples of young adults. A second limitation is that all nutritional data and most of the nutritional assessment methods presented here are self-reported. Finally, this is a cross-sectional study, and therefore, we acknowledge that we are not able to draw causal conclusions but only observations.

5. Conclusions

The mean adherence to the MedDiet among Lebanese students was discrete but lower than the adequate adherence score even though half of the studied population showed adequate adherence to the MedDiet. They declared food consumption according to the MedDiet standards but not in a widespread way. Awareness should be spread among university students to highlight the benefits of MedDiet and encourage its adherence.

Author Contributions

M.d.M.B. and J.A.T. designed the study and wrote the protocol. J.K. and M.S. collected data and conducted literature searches and provided summaries of previous research studies. J.K. conducted the statistical analysis. M.d.M.B., J.K., M.S., and J.A.T. wrote the first draft of the manuscript. All authors have read and agreed to the published version of the manuscript.

Funding

Instituto de Salud Carlos III (CIBEROBN CB12/03/30038) co-funded by the European Regional Development Fund, Grant of support to research groups no. 35/2011 (Balearic Islands Gov.), HERMES EU-Program, and EU-COST Action CA16112. The funding sponsors had no role in the design of the study, in the collection, analyses, or interpretation of the data; in the writing of the manuscript, and in the decision to publish the results.

Institutional Review Board Statement

The study was conducted according to the guidelines of the Declaration of Helsinki and approved by the Balamand University Ethics Committee (approval reference 1.2019).

Informed Consent Statement

Informed consent was obtained from all subjects involved in the study.

Data Availability Statement

There are restrictions on the availability of data for this trial, due to the signed consent agreements around data sharing, which only allow access to external re-searchers for studies following the project purposes. Requestors wishing to access the trial data used in this study can make a request to [email protected].

Conflicts of Interest

The authors declare that they have no conflict of interest.

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Table
Table 1. Adherence to MedDiet and related variables.
Table 1. Adherence to MedDiet and related variables.
AllMenWomen
nMean (SD)Median (IQR)P *nMean (SD)Median (IQR)P *nMean (SD)Median (IQR)P *
Total sample5258.0 (2.2)8.0 (7.0–9.5) 2788.0 (2.2)8.0 (7.0–10.0) 2477.9 (2.1)8.0 (7.0–9.0)
Age
18–213357.8 (2.2)8.0 (7.0–9.0)0.0331617.8 (2.3)8.0 (7.0–9.0)0.2201747.8 (2.1)8.0 (6.0–9.0)0.073
22–251908.2 (2.0)8.0 (7.0–10.0) 1178.2 (2.1)8.0 (7.0–9.0) 738.3 (2.0)8.0 (7.0–10.0)
Working status
University student4347.9 (2.2)8.0 (7.0–9.0)0.0182217.9 (2.2)8.0 (7.0–9.0)0.0492137.9 (2.1)8.0 (7.0–9.0)0.219
University student and worker918.4 (2.1)9.0 (7.0–10.0) 578.5 (2.1)9.0 (7.0–10.0) 348.2 (2.0)8.0 (8.0–10.0)
Smoking habits
Yes1767.7 (2.3)8.0 (6.3–9.0)0.0431207.7 (2.4)8.0 (6.0–9.0)0.078567.7 (2.2)8.0 (7.0–9.0)0.216
No/did not smoke in the past five years3498.1 (2.1)8.0 (7.0–10.0) 1588.2 (2.1)8.0 (7.0–10.0) 1918.0 (2.1)8.0 (7.0–10.0)
Willingness to change diet
Yes4388.0 (2.1)8.0 (7.0–9.3)0.0492188.0 (2.3)8.0 (7.0–9.3)0.9142208.1 (1.9)8.0 (7.0–9.8)<0.001
No877.5 (2.4)7.0 (6.0–10.0) 607.5 (2.1)8.0 (6.0–8.0) 276.5 (2.7)6.0 (4.0–8.0)
Abbreviations: SD, standard deviation; IQR, interquartile range; MedDiet, Mediterranean diet. * Evaluated by Mann–Whitney U-test.
Table
Table 2. Stratification of adherence to MedDiet items.
Table 2. Stratification of adherence to MedDiet items.
AllMenWomen
YesNoYesNoYesNo
n%n%n%n%n%n%P *
Q1: Olive oil for cooking45386.37213.723785.34114.721687.43112.60.465
Q2: Quantity of olive oil per day26450.326149.715054.012846.011446.213353.80.074
Q3: Vegetables portion per day35166.917433.117362.210537.817872.16927.90.017
Q4: Fruits portion per day28153.524446.515555.812344.212651.012149.00.277
Q5: Red meat per day29556.223043.815957.211942.813655.111144.90.623
Q6: Butter/ margarine portion per day35367.217232.818566.59333.516868.07932.00.720
Q7: Sugary drinks portion per day27251.825348.213749.314150.713554.711245.30.219
Q8: Wine portion per week10319.642280.46322.721577.34016.220783.80.063
Q9: Legumes portion per week36569.516030.518466.29433.818173.36626.70.078
Q10: Fish and fish products portion per week15128.837471.29734.918165.15421.919378.10.011
Q11: Processed deserts portion per week26650.725949.314351.413548.612349.812450.20.707
Q12: Nuts portion per week25448.427151.615355.012545.010140.914659.10.001
Q13: Consumption of chicken preferably over meat35166.917433.117362.210537.817872.16927.90.017
Q 14: Cooking vegetables, pasta, rice with olive oil, onion, garlic and tomato per week41879.610720.421276.36623.720683.44116.60.043
* Men vs. women by chi-square test. MedDiet: Mediterranean diet.
Table
Table 3. Adequacy of adherence to MedDiet according to different variables.
Table 3. Adequacy of adherence to MedDiet according to different variables.
Score < 9Score ≥ 9 Crude OR
(95% CI)
n%n%P *
Total sample31059.021541.0
Sex
Men16659.711240.30.7431.04 (0.73–1.49)
Women14458.310341.7
Age
18–2120661.512938.50.1300.64(0.44–0.94)
22–2510454.78645.3
Working status
University student26661.316838.70.0220.54 (0.33–0.89)
University student and worker4448.44751.6
Smoking habits
Yes11364.26335.80.0880.69 (0.48–1.01)
No/did not smoke in the past five years19756.415243.6
Willingness to change diet
Yes25558.218341.80.3861.91 (1.19–3.03)
No5563.23236.8
Abbreviations: OR, odds ratio; CI, confidence interval; MedDiet, Mediterranean diet. * Evaluated by chi-square test.
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Karam, J.; Bibiloni, M.d.M.; Serhan, M.; Tur, J.A. Adherence to Mediterranean Diet among Lebanese University Students. Nutrients 2021, 13, 1264. https://doi.org/10.3390/nu13041264

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Karam J, Bibiloni MdM, Serhan M, Tur JA. Adherence to Mediterranean Diet among Lebanese University Students. Nutrients. 2021; 13(4):1264. https://doi.org/10.3390/nu13041264

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Karam, Joanne, Maria del Mar Bibiloni, Mireille Serhan, and Josep A. Tur. 2021. "Adherence to Mediterranean Diet among Lebanese University Students" Nutrients 13, no. 4: 1264. https://doi.org/10.3390/nu13041264

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