Marta Plichta

Dr. Marta Plichta

Department of Food Market and Consumer Research, Institute of Human Nutrition Sciences, Warsaw University of Life Sciences (SGGW-WULS)
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Research Focus & Metrics

Academic Career Length

9Years (2018-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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17 September 2020 in Nutrients
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Journal Article
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Marzena Jezewska-ZychowiczMarzena Jezewska-Zychowicz
Marzena Jezewska-Zychowicz
Marta PlichtaMarta Plichta
Marta Plichta
MKMaria Królak
Maria Królak
The present study aimed to investigate whether trust in circulating information and perceived stress are predictors of consumers’ fear of limited access to food as well as predictors of food purchase behaviors during the COVID-19 pandemic. The computer-assisted web interviewing (CAWI) technique was used to collect data from 1033 Polish adults in March 2020. Logistic regression was used to estimate the likelihood of fear of limited access to food and the likelihood of purchase of larger amounts of food than usual. The likelihood of experiencing fear of limited access to food increased by 16% with higher perceived stress, by 50% with higher trust in “Mass media and friends”, and by 219% with perceived changes in food availability in the previous month. Trust in “Polish government institutions” decreased the chance of experiencing such fears by 22%. The likelihood of purchasing larger quantities of food than usual increased by 9% with higher perceived stress, by 46% with higher trust in “Mass media and friends”, by 81% with perceived changes in food availability in the last month, and by 130% with fears of limited access to food as the pandemic spreads. Government institutions may have difficulty in disseminating pandemic-related recommendations through media, not only due to relatively low trust people have in media organizations but also due to the increasing likelihood of the occurrence of both fears regarding food availability and panic-stricken food-buying behaviors with increase in trust in this source of information. Therefore, it is necessary to develop interventions that will reduce perceived stress and improve the trust in information from reputable sources.

10 May 2021 in Nutrients
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Journal Article
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Marzena Jezewska-ZychowiczMarzena Jezewska-Zychowicz
Marzena Jezewska-Zychowicz
Marta PlichtaMarta Plichta
Marta Plichta
Małgorzata DrywieńMałgorzata Drywień
Małgorzata Drywień
Jadwiga HamulkaJadwiga Hamulka
Jadwiga Hamulka
Food neophobia (FN) is associated with reduced quality of diet in adults; thus, the understanding of the relationship between FN and food consumption in more depth appears to be a key issue. The aim of the study was to assess the relationship between food neophobia, dietary patterns, food choice motives, and food label reading in the group of adults. Data were collected using the computer-assisted personal interviewing technique (CAPI). A cross-sectional quantitative survey was carried out in November–December 2017 in a sample of 1017 Polish adults. The questionnaire used in the study included the Food Neophobia Scale (FNS), the Beliefs and Eating Habits Questionnaire (KomPAN), and questions regarding food choice motives, reading food labels, and sociodemographic characteristics. The food neophobics were older, had a lower level of education, and had higher BMI compared to others. Compared to others, among the food neophobics, there were more people who often consumed vegetables, fruit, meat, and meat products and who rarely consumed functional and convenience food, sweets, and sweetened beverages. When choosing food, more food neophobics chose healthy and tasteless food products, while more food neophilics chose unhealthy and tasty products. More food neophobics declared not reading price and shelf-life information on food labels compared to the other two groups. Although food neophobia may make adaptation to dietary recommendations difficult, health-promoting features of the diet were observed within the food neophobics. Actions focusing on food choice motives may help even more to limit the effects of food neophobia in adults. Further research is recommended to confirm the observed relationships under different sociocultural conditions.


1 August 2018 in Nutrients
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Marzena Jezewska-ZychowiczMarzena Jezewska-Zychowicz
Marzena Jezewska-Zychowicz
JGJerzy Gębski
Jerzy Gębski
Dominika GuzekDominika Guzek
Dominika Guzek
MŚMonika Świątkowska
Monika Świątkowska
DSDagmara Stangierska
Dagmara Stangierska
MWMilena Wasilewska
Milena Wasilewska
Sedentary behavior, a low physical activity level, and unhealthy dietary patterns are risk factors for major chronic diseases, including obesity. The aim of this study was to assess the associations of dietary patterns (DPs) with sedentary behaviors (SB) and self-reported physical activity (PA). The data was collected in November 2016 through a cross-sectional quantitative survey amongst 1007 Polish adults. Principal components analysis (PCA) was conducted to derive DPs. Logistic regression analysis was used to verify associations between PA and SD (independent variables), and DPs (dependent variables). Five DPs (‘Fast foods & sweets’—FF&S; ‘Meat & meat products’—M∓ ‘Fruit & vegetable’—F&V; ‘Wholemeal food’—WF; ‘Fruit & vegetable juices’—F&VJ) were identified. Representing M&MP independently increased the chance of watching TV at least once a day (by 73%). There was no such relationship between the FF&S and sedentary behaviors. Being in the upper tertiles of pro-health DPs increased the chance of reading books (by 177%—F&V, 149%—WF, 54%—F&VJ) and watching TV (by 71%—F&V). On the other hand, belonging to the upper tertile of WF reduced the chance of using the computer for more than 4 h a day. Belonging to the upper tertile of healthy DPs (WF and F&VJ) increased the chances of moderate or high physical activity, both at work/school and during leisure time. Within F&V, there was a lower chance of moderate or high physical activity at work/school. Being in the upper tertile of unhealthy DPs (FF&S and M&MP) did not show any significant association with physical activity. The study indicated the associations between both healthy and unhealthy DPs and some sedentary behaviors. Association between F&V and watching TV and reading books/newspapers should be recognized as potentially efficient in education. Association between M&MP and watching television can be indicative of the mutual overlap of a negative lifestyle resulting in the development of overweight and obesity, especially since the extent of occurrence of sedentary behaviors is high.

Marzena Jezewska-ZychowiczMarzena Jezewska-Zychowicz
Marzena Jezewska-Zychowicz
Marta PlichtaMarta Plichta
Marta Plichta
The purpose of this study was to examine the relationships between diet quality, dieting, nutrition knowledge and attitudes in a group of Polish young adults. A cross-sectional survey was conducted in 2018 amongst 638 students of food and nutrition-related majors. Based on the frequency of consumption of 24 food groups, the “Pro-Healthy Diet Index” (pHDI) and “Non-Healthy Diet Index” (nHDI) were calculated. To assess the nutrition knowledge, the “GAROTA” test was used. The k-means clustering method was used to identify clusters-attitudes towards food and nutrition. The relationships between pHDI and nHDI indices, dieting, nutrition knowledge (NK), and attitudes towards food and nutrition were verified, using multiple linear regression analysis. The results confirmed some relationships between the variables. Higher nHDI characterized males (p < 0.0001) and people with more unfavorable attitudes towards food and nutrition (p < 0.0001), and those not using a diet (p < 0.0001). Higher nutrition knowledge (p < 0.0001) and higher BMI (p = 0.0370) were correlated with lower nHDI. Higher pHDI characterized people with more favorable attitudes (p < 0.0001) and those using a diet (p = 0.0002). Nutrition knowledge showed an adverse association with nHDI (r = −0.172, p < 0.05) and no association with pHDI. Thus, declarative nutrition knowledge does not seem to be a good indicator of healthy dietary behavior. Nutrition education programs that concentrate only on knowledge of facts, and neglect the development of favorable attitudes towards food and nutrition, may not be efficient enough to develop adequate dietary behavior of students.

5 January 2019 in Nutrients
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Journal Article
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Marta PlichtaMarta Plichta
Marta Plichta
Marzena Jezewska-ZychowiczMarzena Jezewska-Zychowicz
Marzena Jezewska-Zychowicz
JGJerzy Gębski
Jerzy Gębski
Body dissatisfaction is central to clinically diagnosed eating disorders (ED) and seems to be important in causing other non-clinical disorders, including orthorexia nervosa (ON). It can also affect eating behaviors. The aim of this study was to assess the associations of ON tendency with dietary patterns (DPs) and body satisfaction. The data were collected in 2017 through questionnaire survey among 1120 students of health-oriented and other academic programs from seven universities in Poland. Principal components analysis (PCA) was conducted to derive DPs and body satisfaction factors. Six DPs, such as, ‘High-sugar products & snacks’, ‘Fresh products & nuts’, ‘Fatty products & dressings’, ‘Oils & potatoes’, ‘Dairy products & whole-meal bread’, ‘Meat’, and two body satisfaction factors, such as, ‘Bottom body & weight’, and ‘Upper body’ were identified. ON tendency was measured using ORTO-15 questionnaire with both cut-offs, i.e., 35 and 40. Logistic regression analysis was used to verify associations between ON tendency, body satisfaction factors, and DPs. More students of health related majors were characterized by ON tendency in comparison to students of other majors (35.9 vs. 37.2; p < 0.001). More women were dissatisfied with ‘Bottom body & weight compared to men (<0.001). The higher the body mass index (BMI), the more people were dissatisfied with ‘Bottom body & weight’ (p < 0.001). More students with ON tendency were satisfied with their ‘Upper body’ than those without ON tendency, but there were no differences in ON tendency in regard to ‘Bottom body & weight’ satisfaction. ON tendency was associated with more frequent consumption of vegetables, fruits, nuts and seeds, and less frequent consumption of products high in sugar, snacks, fatty products and dressings. Using cut-off at 35 in ORTO-15 seems to be more appropriate than cut-off at 40 to identify external variables describing ON. Future research on orthorexia nervosa should use other research tools than ORTO-15 to better identify individuals with ON and to confirm our findings.