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\def\makelabel##1{\upshape ##1}}% } {\end{list}\end{raggedright}} \newenvironment{specHead}[2]% {\vspace{20pt}\hrule\vspace{10pt}% \phantomsection\label{#1}\markright{#2}% \pdfbookmark[2]{#2}{#1}% \hspace{-0.75in}{\bfseries\fontsize{16pt}{18pt}\selectfont#2}% }{} \def\TheFullDate{1970-01-01 (revised: 01 January 1970)} \def\TheID{\makeatother } \def\TheDate{1970-01-01} \title{The Effect of the Medical University Studying on the Eating Habits and the Health of Slovak Students} \author{}\makeatletter \makeatletter \newcommand*{\cleartoleftpage}{% \clearpage \if@twoside \ifodd\c@page \hbox{}\newpage \if@twocolumn \hbox{}\newpage \fi \fi \fi } \makeatother \makeatletter \thispagestyle{empty} \markright{\@title}\markboth{\@title}{\@author} \renewcommand\small{\@setfontsize\small{9pt}{11pt}\abovedisplayskip 8.5\p@ plus3\p@ minus4\p@ \belowdisplayskip \abovedisplayskip \abovedisplayshortskip \z@ plus2\p@ \belowdisplayshortskip 4\p@ plus2\p@ minus2\p@ \def\@listi{\leftmargin\leftmargini \topsep 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\textcolor{GJMediumGrey}{\rule{\textwidth}{2pt}} \vskip16pt \textcolor{GJBlue}{\large\bfseries\abstractname\space} }{% \vskip8pt \textcolor{GJMediumGrey}{\rule{\textwidth}{2pt}} \vskip16pt } \usepackage[absolute,overlay]{textpos} \makeatother \usepackage{lineno} \linenumbers \begin{document} \author[1]{Dominika Faixová} \author[2]{Zuzana Jurinová} \author[3]{Zita Faixová} \author[4]{Ján Kyselovi?} \author[5]{Andrea Ga?ová} \renewcommand\Authands{ and } \date{\small \em Received: 1 January 1970 Accepted: 1 January 1970 Published: 1 January 1970} \maketitle \begin{abstract} Background: University studying is demanding on the mental as well as the physical side of the organism. However, studying medicine is even more challenging-the study is six years long, and it is tough to remember more information. The study changed the social life of students, and the students didn't have enough time to relax. The examinations of students are full of stress. Stress harms health, especially in the gastrointestinal tract (autonomic nerve system).Aims: The first study evaluated the relationship between medical university studying (university stress-academic stress) and eating habits and their effect on student's health. We analysed the eating changing during the academic year.Methods: We made the questionnaire and distributed it to medical students at the Faculty of Medicine in Bratislava, Slovakia. A total of 587 students from the 1 st to 6 th year completed selfreport measures of BMI, academic stress, eating habits and the occurrence or development of digestive problems during the study. \end{abstract} \keywords{academic stress; eating habit; gastrointestinal disorders; students.} \begin{textblock*}{18cm}(1cm,1cm) % {block width} (coords) \textcolor{GJBlue}{\LARGE Global Journals \LaTeX\ JournalKaleidoscope\texttrademark} \end{textblock*} \begin{textblock*}{18cm}(1.4cm,1.5cm) % {block width} (coords) \textcolor{GJBlue}{\footnotesize \\ Artificial Intelligence formulated this projection for compatibility purposes from the original article published at Global Journals. However, this technology is currently in beta. \emph{Therefore, kindly ignore odd layouts, missed formulae, text, tables, or figures.}} \end{textblock*} \begin{textblock*}{10cm}(1.05cm,3cm) {{\textit{CrossRef DOI of original article:}} \underline{}} \end{textblock*}\let\tabcellsep& \section[{Introduction}]{Introduction}\par ealthy eating habits are essential in preventing the occurrence of non-communicable diseases (NCDs), including diabetes mellitus, cardiovascular diseases, stroke and cancer. An unhealthy diet and lack of physical activity lead to global health risks. The World Health Organization (WHO) suggests an optimally balanced diet to prevent unhealthy weight gain. Caloric intake should be balanced with its expenditure; total intake of fats should not exceed 30\%, and total intake of sugar should not exceed 10\% of daily energetic intake, and salts should be kept to a maximum of 5 g per day in order to prevent arterial hypertension, cardiovascular diseases and stroke in adults \hyperref[b0]{[1]}. WHO's member states signed off on reducing salt intake in the global population by30\% by 2025 and agreed to stop growth in the incidence of diabetes mellitus in adults and adolescents and obesity in children by 2025 \hyperref[b1]{[2]}.\par Diet is not only affected by social and economic aspects (e.g. income, food prices, individual preferences, cultural traditions and geographical) and environmental factors (including climatic changes) but also by a person's psychological state \hyperref[b2]{[3]}- \hyperref[b3]{[4]}.\par The interaction between stress and eating habits is known. Authors Adam and Epel, 2007) have written about situations when individuals choose unhealthy food under stressful conditions. Stress is also linked with higher consumption of sweets and fats \hyperref[b4]{[5]}, salts \hyperref[b5]{[6]}, but also with a reduction in a well-balanced diet (e.g., meat, fruits, vegetables) \hyperref[b6]{[7]}. Students are often exposed to stressful, competitive academic conditions, and exam periods have been shown to be extremely demanding psychologically \hyperref[b7]{[8]}. Negative stress effects could lead to the disruption of a healthy lifestyle and to the occurrence of non-communicable diseases \hyperref[b8]{[9]}. \section[{II.}]{II.} \section[{Objectives}]{Objectives}\par It is well known that stress is an essential factor affecting food selection and intake and impacts the origin and development of digestive problems. Stress is Methods: We made the questionnaire and distributed it to medical students at the Faculty of Medicine in Bratislava, Slovakia. A total of 587 students from the 1 st to 6 th year completed self-report measures of BMI, academic stress, eating habits and the occurrence or development of digestive problems during the study.\par Results: Our results showed that most respondents were of normal range weight and their eating habits were omnivorous (90\%); more than half of the participants had breakfast regularly, and almost half of the students ate junk food a few times per week. Our participants consumed less food but more junk food and energy drinks during the exam period, which can cause obesity and digestive problems. Conclusion: Our findings confirm that subjective academic feelings of stress play an important role in eating habit changes and in the origin of digestive disorders in our medical students. a subjective emotion, and every student can feel the stress of another possibility.\par The objectives of this study were to compare the eating habits and their changing of the Medical students studied at the Faculty of Medicine in Bratislava. We analysed the students of all six years of the Faculty studying. We had two hypotheses. The first one was that the eating habits changed during the exam period compared to other parts of the academic year (the exam period vs the holiday or teaching period). The second hypothesis was that students in the first and two last academic years feel more stress than in the other academic years. \section[{III.}]{III.} \section[{Materials and Methods}]{Materials and Methods} \section[{a) Participants}]{a) Participants}\par A cross-sectional questionnaire study was conducted during the academic year 2019/2020 before the COVID pandemic began. Five hundred eighty-seven students from all 1948 medical students (137 men (23.3\%) and 450 women (76.7\%)) from the 1 st to the 6 th year took part in the study. The Faculty of Medicine in Bratislava has approximately 350 students (1 male to 3 female) every year. We analysed participants' numbers and gender using the R statistics software.\par We were asked to complete a health survey questionnaire on their eating habits through social media. We were inspired by the Eating habits Questionnaire \hyperref[b9]{[10]}.\par This study was carried out in accordance with the Code of Ethics of the World Medical Association, Declaration of Helsinki (WMA Declaration of Helsinki, 2013), and The University Board approved the project in terms of its ethical aspects.\par The inclusion criteria were -actual study at the Faculty of Medicine in Bratislava, Slovak students (not the international students -their eating habits are different from the Slovak eating habits) and the willingness to voluntarily answer the questions. The exclusion criteria were the blank answers.\par All questionnaires were completed, and no participants were excluded from the study. The questionnaire was completed anonymously, and the participants were assured of data confidentiality. All participants provided consent to participate after being debriefed about the true nature of the study.\par Eating habits during the examination period of the academic year (according to the study plan schedule) and the rest of the academic year (teaching and holiday) were compared. \section[{b) Questionnaire}]{b) Questionnaire}\par The questionnaire included four parts. The first contained personal data: gender, age and anthropometric parameters (height and body weight).\par The second part of the questionnaire included questions focused on the type of diet; evaluation of eating habits, how often they eat breakfast, where they are used to having lunch, how often they eat snacks (sweet, salty), and how much water they drink daily, how often they drink sweetened drinks and beverages for increasing energy/attention and what nutritional supplements they take.\par The next part of the questionnaire focused on changes in body weight, food intake, snacks and energy drinks during the exam period. The final questions concerned the incidence of chronic gastrointestinal tract (GIT) disorders during university studies, changes in the frequency of their occurrence during the examination period, and ways of dealing with GIT disorders. \section[{c) Body Mass Index (BMI)}]{c) Body Mass Index (BMI)}\par Body Mass Index (BMI -weight/height 2 ) was calculated by measuring the weight in kilograms and dividing it by height in squared metres \hyperref[b10]{[11]}. \section[{d) Statistical analysis}]{d) Statistical analysis}\par For statistical analysis, we used Microsoft Excel and GraphPad Prism 9.4.0 (descriptive statistics, absolute values, means, standard deviation, percentages) and the R Statistics Software for the sample size. \section[{IV.}]{IV.} \section[{Results}]{Results}\par Five hundred eighty-seven of all 1948 students completed the questionnaire -137 men (23.3\%) and 450 women (76.7\%) -between the ages of 18 and 32 years old (mean ages= 22.16±2.58 years). In accepting or rejecting our hypotheses, we received when more than 50\% answers were to one question.\par Body Mass Index (BMI) is a statistical index using a person's weight and height to estimate body fat in males and females of any age. It defines a person as underweight, normal weight, overweight and obese. In our study, 60.6 \% of men (N=83) had normal BMI values, but more than 31.4\% (N=43) were overweight. Among women, 77.2\% (N=347) of those monitored had normal BMI; however, 15.1\% (N=68) were underweight, and 7.3\% (N=33) were overweight. The mean value of men's BMI was 34.3±3.32 kg/m 2, and women's mean BMI was 20.99±2.6 kg/m 2 . Most participants (89.6\%) ate a well-balanced diet, including meat products, and only 1.4\% of the students were vegans. The option pescatarian was selected by 3.4\% of students, Lactovegetarian by 2.7\% and a special diet for health reasons (gluten-free, low histamine, lactose-free, dairy-free) by 3.6\% of students. \section[{a) Eating habits outside the examination period}]{a) Eating habits outside the examination period}\par During the semester, more than half of students (56.9\%) self-evaluated their healthy eating habits as positive. The other answers are in Table \hyperref[tab_0]{1}. More than half of the participants -66.6\%-ate breakfast daily, and more than half of the students (56.5\%) ate lunch in the canteen (Table \hyperref[tab_1]{2}). Almost half of participants ate junk food a few times per week, drank 1 -2 litres of water per day (48.4\%) and rarely drank sweetened drinks (49.5\%); the majority of students (75.3\%) drank coffee to increase their attention (Table \hyperref[tab_2]{3}). b) Eating habits during the exam period Another part of the questions focused on changes in eating habits during the exam period, which is characterised by higher exposure to stress. Half of the women (53.3\%) monitored a reduced food consumption under stress exposure (Table \hyperref[tab_4]{5}). Almost half of respondents (47.8\%) ate less compared to 25.2\% of students who ate more during the exam. Approximately the same number of students maintained their weight (49.4\%) as the lost weight from the study at the medical faculty (50.6\%) (Table \hyperref[tab_5]{6}). \section[{i. Gastrointestinal problems during exam periods}]{i. Gastrointestinal problems during exam periods}\par The final questions on the questionnaire focused on the incidence of gastrointestinal tract (GIT) disorders and on ways of solving these health issues. Less than half of men (42.3\%) and less than one-third of women (26.9\%) had no digestive problems. Almost half of the women had diarrhoea (45.55\%), abdominal cramps (42.22\%) and nausea (37.11\%), vomiting (15.33\%), gastroesophageal reflux (GER) (7.74\%) and constipation (14.8\%). Among male students digestive problems occur less often: diarrhoea (26.2\%), abdominal cramps (16.7\%), nausea (19.7\%), vomiting (9.48\%), GER (16.05\%) and constipation (6.56\%) (Table \hyperref[tab_6]{7}). Two-thirds of female students (66.6\%) and almost half of male students (46.72\%) noted an increased frequency of digestive problems during exam periods(Table \hyperref[tab_7]{8}). Among the students with lower appetite during exam periods, 75.08\% had digestive problems more often precisely in this period. Among the students with the same appetite during the academic year, 60.1\% noted some form of digestive problems during the exam period. Half of the respondents (50.6\%) with a greater appetite during the exam period also had a higher frequency of digestive problems (Table \hyperref[tab_5]{6}).\par Among students with a higher energy drink consumption frequency, two-thirds (67.6\%) had digestive problems more often (Table \hyperref[tab_5]{6}). Among students with digestive problems, 63.2\% did not solve their problems, 13.28\% decided on a change of diet, 11.75\% took over-the-counter drugs, 10.2\% visited a doctor, and 9.2\% drank digestive tea (Table \hyperref[tab_8]{9}). V. \section[{Discussion}]{Discussion}\par This study monitors the changes in diet in Slovak medical students under stress (academic stress) exposure during the exam period of the academic year before the Covid pandemic. Most respondents had normal weight, but one-third of the men were overweight. In Polish, Hungarian and American students, a higher incidence of overweight in men was also noted in comparison to women \hyperref[b11]{[12]}- \hyperref[b13]{[14]}. On the other hand, the obesity of Iranian students has proportionally reversed: 22.5\% of Iranian women were overweight in comparison to 7.3\% of Slovak women, and 7.9\% of Iranian men were overweight in contrast to 31.4\% of Slovak men \hyperref[b14]{[15]}. The prevalence of obesity among university students was caused by their socioeconomical situation, as well as ethnicity, education, income, culture, eating and exercise habits. The higher incidence of overweight in male students in comparison to women may also be caused by different amounts of muscle mass; thus, a better indicator of obesity is measuring the amount of fat and its distribution in the body \hyperref[b15]{[16]}.\par The majority of Slovak medical students reported eating a varied diet that included animal products (an omnivorous type of diet), and only 1.4\% were vegans. Studies show that vegans have a low body mass index (BMI) and low cholesterol levels in blood plasma \hyperref[b16]{[17]}. The Mediterranean diet appears to be ideal for preventing cardiovascular diseases and obesity \hyperref[b17]{[18]}, \hyperref[b18]{[19]}. We can speak about the Mediterranean diet as it is composed of extra virgin olive oil, fresh fruit, vegetables, cereals, nuts, legumes, fish, meat, dairy products, red wine and low amounts of eggs and sweets \hyperref[b19]{[20]}.\par In our study, more than half of the participants had breakfast regularly, the same as Chilean students, who ate breakfast 5 -7 times per week \hyperref[b20]{[21]} The percentage distribution of the diet during the day affects body composition. Chilean students with a low-fat body percentage consumed almost 19\% of their daily intake at breakfast, whereas students with a high body fat percentage consumed only 8.9\% of their daily intake for breakfast \hyperref[b21]{[22]}.\par Eating junk food can increase body weight. In our study, 48.8\% of students consume junk food a few times per week. Caso et al., \hyperref[b23]{[23]} and \hyperref[b24]{[24]} confirmed that overweight students eat junk food more often and mainly during times of negative emotions (sadness, anger, fear, academic stress) in comparison to students with normal weight \hyperref[b23]{[23]}.\par Slovak and American students drink coffee to improve concentration. In addition, American students drink coffee to increase attention (79\%), because of its taste (68\%), for socialising (39\%), to improve physical energy (27\%) and mood (18\%), and to relieve stress (9\%) \hyperref[b25]{[25]}.\par Stress is defined as the state of affairs arising when a person relates to situations in certain ways. People are not disturbed by conditions but by how they appraise and react to situations. In general, a person experiences stress when demands exceed a person's coping abilities, resulting in reactions, such as disturbances of cognition, emotion and behaviour, which can adversely affect well-being. The majority of students experience academic stress \hyperref[b26]{[26]}, and the exam period appears to be the main source of stress \hyperref[b27]{[27]}. Academic stress refers to the stress associated with the academic environment, writing tests, performing difficult cognitive tasks or being evaluated \hyperref[b28]{[28]} The current literature offers inconsistent findings regarding gender relative to perceived levels of stress \hyperref[b29]{[29]}. Ng et al., \hyperref[b30]{[30]} found that females were more likely to feel as though they experienced higher levels of stress, which was in agreement with Thawabien \hyperref[b31]{[31]}. In addition, female students reported more stress-related issues, such as low self-esteem, pressure from exams and depression \hyperref[b31]{[31]}. However, no gender differences in coping with stress were found by Donaldson \hyperref[b32]{[32]}.\par Exposure to stress factors can lead to gastrointestinal problems \hyperref[b33]{[33]}. Knowles et al., \hyperref[b34]{[34]}monitored significantly more digestive problems, increased levels of cortisol and decreased amounts of bacterial strains before exam periods. These findings play an important role in the prevention and therapy of digestive problems during stress periods. Increased levels of cortisol are characteristic of chronic stress \hyperref[b35]{[35]}and there is a relationship between abdominal obesity and higher levels of cortisol \hyperref[b36]{[36]}. Activation of the sympathetic adrenal medullary system, with the release of catecholamines (epinephrine and norepinephrine) during the acute stress response, leads to a reduction of appetite \hyperref[b35]{[35]}.\par Stress can cause an increased or decreased appetite. Chronic stress is characterised by a preference for junk food (with high levels of fat and sugar), and studies show that chronic stress can lead to overweight, mainly in the male population \hyperref[b35]{[35]}. In our study, half of the respondents consumed less; however, during the examination period, they consumed more junk food. Caso \hyperref[b23]{[23]} confirmed that academic stress is connected with higher consumption of junk food. Oliver \hyperref[b6]{[7]} found that approximately the same number of students ate less (38\%) or more (42\%) food during examination periods. In contrast, the appetite of English students did not change; there were changes in the macronutrient intake ratio, but total calorie intake did not change during exam periods \hyperref[b38]{[37]}. In our study, half the participants (55.1\%) drank energy drinks to improve their concentration, and approximately the same number of students (50\%) lost weight or did not change in weight during academic stress.\par In general, stress can increase or decrease appetite, and a well-balanced diet and BMI can also be affected by gender \hyperref[b5]{[6]}. Stress-eaters (people who eat more under negative emotions, such as fear and sadness) more often choose a high fat and/or high carbohydrate diet under stress conditions \hyperref[b39]{[38]}.\par Brain signals can affect the motor, sensory and secretory modalities of the gastrointestinal tract; however, gut signals are affected by emotional behaviour. Stress and pain modulate this system using the nervous, endocrine and immune systems. As a result, the gut-brain axis has changed to the microbiota-gut-brain axis. Therapy with probiotics appears to be suitable for abdominal dysfunction caused by stress. Kato-Kataoka et al. \hyperref[b40]{[39]} monitored the effect of the probiotic bacteria Lactobacillus case is train Shirota on abdominal dysfunction in a double-blind study composed of students before an exam period. They monitored the positive effect of daily intake of probiotics. They found that whereas cortisol levels were significantly increased in the placebo group, in the group with probiotic intake the amount of bacterial strains in the gut microbiota was significantly increased. The percentage of members of the family Bacteroidaceae was significantly reduced.\par Exposure to stress factors plays a key role in the development of visceral pains (e.g. functional gastrointestinal diseases; irritable bowel syndrome \hyperref[b41]{[40]}. In our study, almost 60\% of students had digestive problems during the examination period, and women, in particular, suffered from diarrhoea, abdominal cramps, nausea and constipation. Yildirim et al. \hyperref[b42]{[41]} confirmed the interaction between stress and constipation in Turkish medical students. They also monitored the percentage increase in the number of students with constipation depending on the year of study. Abdominal aroma and meridian massage positively affect constipation and frequency of defecation in female students. Application of abdominal massages leads to a reduction of drug intake and can help to release stress during an exam period \hyperref[b43]{[42]}. Stress appears to be one of the factors affecting the origin of irritable bowel syndrome. The prevalence of irritable bowel syndrome in Chinese students was 15.7\%, and the most common symptoms were changes in stool consistency, frequency of defecation and the presence of abdominal pain released with defecation. The symptoms appeared more often in female students. Psychological and psychosomatic symptoms of affairs and depression were more common in patients with irritable bowel syndrome \hyperref[b44]{[43]}; therefore, increased demands on students' psyche during exam periods could lead to digestion problems. Polish students with a lack of physical activity repeatedly suffered from digestive problems and were frequently more absent from school because of abdominal pains than students with a sufficient amount of physical activity \hyperref[b45]{[44]}. \section[{a) Limitations}]{a) Limitations}\par The present study has several limitations. Data were collected and evaluated from Slovak medical students, who filled answers themselves; thus, the participants in our study do not necessarily represent the nutrition of Slovak medical students in general. \section[{VI.}]{VI.} \section[{Conclusions}]{Conclusions}\par In conclusion, this is the first study dealing with the nutrition issues of Slovak medical students depending on the period of the academic year. Our results suggest that in higher exposure to stress, mainly during exam periods, the participants consumed less food but more junk food and energy drinks, leading to overweight or obesity. We confirmed the assumption that academic stress plays an essential role in the origin of digestive problems, which could be decreased by nutrition education and effective approaches to cope with stress during university life.\begin{figure}[htbp] \noindent\textbf{1} \par \begin{longtable}{P{0.34931506849315064\textwidth}P{0.5006849315068493\textwidth}} Rate\tabcellsep N (\%)\\ Yes\tabcellsep 70 (11.9)\\ Rather yes\tabcellsep 334 (56.9)\\ Rather not\tabcellsep 150 (25.5)\\ Not\tabcellsep 33 (5.7)\end{longtable} \par \caption{\label{tab_0}Table 1 :}\end{figure} \begin{figure}[htbp] \noindent\textbf{2} \par \begin{longtable}{P{0.5487341772151899\textwidth}P{0.3012658227848101\textwidth}} \multicolumn{2}{l}{Frequency of having breakfast N (\%)}\\ Every day\tabcellsep 391 (66.6)\\ Irregularly\tabcellsep 91 (15.5)\\ Seldom\tabcellsep 55 (9.4)\\ Never\tabcellsep 50 (8.5)\\ Place of lunch\tabcellsep \\ Place\tabcellsep N (\%)\\ Canteen\tabcellsep 332 (56.5)\\ Cooking by myself\tabcellsep 53 (9)\\ Restaurant\tabcellsep 130 (22.1)\\ Fast-food restaurant\tabcellsep 60 (10.2)\\ Nocooked meal\tabcellsep 12 (2.2)\end{longtable} \par \caption{\label{tab_1}Table 2 :}\end{figure} \begin{figure}[htbp] \noindent\textbf{3} \par \begin{longtable}{P{0.5487864077669903\textwidth}P{0.1843042071197411\textwidth}P{0.11690938511326861\textwidth}} \tabcellsep \tabcellsep Year 2023\\ \tabcellsep \tabcellsep 11\\ Frequency of eating fast/fried food N (\%)\tabcellsep \tabcellsep Volume XXIII Issue I Version I\\ Never Seldom\tabcellsep 7 (1. 3) 126 (21.5)\tabcellsep ( D D D D )\\ 2 -3 times a week Every day Daily water intake (litres/day)N (\%) Less than 0.5 L 0.5 -1.0 L 1.0 -2.0 L More than 2 L\tabcellsep 287 (48.8) 167 (28.4) 16 (2.7) 138 (23.5) 284 (48.4) 149 (25.4)\tabcellsep Medical Research\\ \multicolumn{2}{l}{Frequency of drinking sugar-sweetened beverages N (\%) Never 156 (26.5) Seldom 291 (49.5) 2 -3 times a week 134 (22.8) Every day 6 (1.2) Drinks to increase energy/an attention N (\%)}\tabcellsep Global Journal of\\ Coffee\tabcellsep 442 (75.29)\tabcellsep \\ Tea\tabcellsep 295 (50.25)\tabcellsep \\ Cola-cola and others\tabcellsep 73 (12.43)\tabcellsep \\ Energy drinks\tabcellsep 99 (16.86)\tabcellsep \\ None\tabcellsep 78 (13.28)\tabcellsep \end{longtable} \par \begin{quote} \par \par \par \par Women took vitamins more often (69.5\%) in comparison to men (60\%) (Table4).G© 2023 Global Journ als\end{quote} \caption{\label{tab_2}Table 3 :}\end{figure} \begin{figure}[htbp] \noindent\textbf{4} \par \begin{longtable}{P{0.2509523809523809\textwidth}P{0.30357142857142855\textwidth}P{0.008095238095238096\textwidth}P{0.2873809523809524\textwidth}} Dietary supplement\tabcellsep Men N (\%)\tabcellsep \tabcellsep Women N (\%)\\ Vitamins\tabcellsep 82 (59.85)\tabcellsep \tabcellsep 313 (69.55)\\ Magnesium\tabcellsep 55 (40.14)\tabcellsep \tabcellsep 231 (51.3)\\ Probiotics\tabcellsep 14 (10.21)\tabcellsep \tabcellsep 72 (16)\\ Fibre\tabcellsep 10 (7.29)\tabcellsep \tabcellsep 35 (7.77)\\ Zinc\tabcellsep 3 (2.18)\tabcellsep \tabcellsep 18 (4.0)\\ Iron\tabcellsep 3 (2.18)\tabcellsep \tabcellsep 7 (1.55)\\ None\tabcellsep 42 (30.65)\tabcellsep 85\tabcellsep (18.8)\end{longtable} \par \caption{\label{tab_3}Table 4 :}\end{figure} \begin{figure}[htbp] \noindent\textbf{5} \par \begin{longtable}{P{0.85\textwidth}} N (\%)\end{longtable} \par \caption{\label{tab_4}Table 5 :}\end{figure} \begin{figure}[htbp] \noindent\textbf{6} \par \begin{longtable}{P{0.6916666666666667\textwidth}P{0.15833333333333333\textwidth}} Without changes\tabcellsep 280 (47.7)\\ Increased during exam period\tabcellsep 287 (48.8)\\ Decreased during exam period\tabcellsep 20 (3.5)\\ \multicolumn{2}{l}{Changes in appetite depending on academic year period N (\%)}\\ Without changes\tabcellsep 250 (42.5)\\ Increased during exam period\tabcellsep 324 (55.2)\\ Decreased during exam period\tabcellsep 13 (2.3)\\ \multicolumn{2}{l}{Changes in body weight from the study at the medical faculty N (\%)}\\ No changes in body weight\tabcellsep 290 (49.4)\\ Weight loss always during exam periods\tabcellsep 297 (50.6)\end{longtable} \par \caption{\label{tab_5}Table 6 :}\end{figure} \begin{figure}[htbp] \noindent\textbf{7} \par \begin{longtable}{P{0.34888059701492535\textwidth}P{0.2759328358208955\textwidth}P{0.2251865671641791\textwidth}} Gastrointestinal disorders\tabcellsep \multicolumn{2}{l}{Men (N/\%) Women (N/\%)}\\ None\tabcellsep 58 (42.3)\tabcellsep 121 (26.9)\\ Diarrhoea\tabcellsep 36 (26.2)\tabcellsep 205 (45.55)\\ Abdominal cramps\tabcellsep 23 (16. 7)\tabcellsep 190 (42.22)\\ Nausea\tabcellsep 27 (19.7)\tabcellsep 167 (37.11)\\ Vomiting\tabcellsep 13 (9.48)\tabcellsep 69 (15.33)\\ Gastroesophageal reflux (GER)\tabcellsep 22 (16.05)\tabcellsep 35 (7.74)\\ Constipation\tabcellsep 9 (6.56)\tabcellsep 67 (14.8)\end{longtable} \par \caption{\label{tab_6}Table 7 :}\end{figure} \begin{figure}[htbp] \noindent\textbf{8} \par \begin{longtable}{P{0.4373188405797101\textwidth}P{0.27101449275362316\textwidth}P{0.14166666666666666\textwidth}} \tabcellsep \multicolumn{2}{l}{Men (N/\%) Women (N/\%)}\\ Without changes\tabcellsep 73 (53.28)\tabcellsep 168 (37.34)\\ Increased during exam period\tabcellsep 64 (46.72)\tabcellsep 282 (66.66)\\ Decreased during exam period\tabcellsep -\tabcellsep -\end{longtable} \par \caption{\label{tab_7}Table 8 :}\end{figure} \begin{figure}[htbp] \noindent\textbf{9} \par \begin{longtable}{P{0.85\textwidth}} N (\%)\end{longtable} \par \caption{\label{tab_8}Table 9 :}\end{figure} \backmatter \subsection[{Funding}]{Funding}\par This research did not receive any specific grant from the public, commercial or not-profit funding agencies. \subsection[{Author Contributions}]{Author Contributions}\par AG and ZJ conceived and designedthe study. 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