Najat Yahia
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Najat Yahia has a total of 25 co-authors. Here are the top co-authors by number of shared publications:
- Carrie A. Brown
Department of Biostatistics, Boston University, 801 Massachusetts Avenue, Boston, MA, 02118, USA
3 shared publications - Mei Chung
Friedman School of Nutrition Science and Policy, Tufts University, Boston, MA 02111, USA
3 shared publications - Melyssa Rapley
Department of Human Environmental Studies, Central Michigan University, Wightman 108, Mt. Pleasant, MI, 48859, USA
2 shared publications - Allan Geliebter
Department of Psychiatry, Icahn School of Medicine at Mount Sinai, 440 W 114th Street, New York, NY, 10025, United States
1 shared publication - Andrea Langolf
Department of Human Environmental Studies, Central Michigan University, Wightman 108, Mount Pleasant, MI, 48859, USA
1 shared publication - C. Peter Herman
University of Toronto
1 shared publication
Latest Publications
- Open Access
- 1 October 2017
- Published by Wolters Kluwer Health in Topics in Clinical Nutrition
- Vol. 32 (4) , 316-329
Implementing Evidence-Based Nutrition Practice Guidelines for Type 2 Diabetes Mellitus in Lebanon
Lebanon is a Middle Eastern country experiencing a surge in the prevalence of type 2 diabetes mellitus among adults. This pilot study evaluated the feasibility and outcomes of implementing the Academy of Nutrition and Dietetics Evidence-Based Nutrition Practice Guidelines (EBNPGs) as part of medical care for patients newly diagnosed with type 2 diabetes mellitus. Seventy-five patients were recruited from 3 Lebanese hospitals, received nutrition care according to EBNPGs, and were followed up for 12 months. Patients achieved significant improvement in clinical outcomes between baseline and 3, 6, and 12 months. Further research is recommended to confirm the benefits of using EBNPGs.
- 1 October 2017
- Published by Wolters Kluwer Health in Topics in Clinical Nutrition
- Vol. 32 (4) , 316-329
Open AccessImplementing Evidence-Based Nutrition Practice Guidelines for Type 2 Diabetes Mellitus in Lebanon
Lebanon is a Middle Eastern country experiencing a surge in the prevalence of type 2 diabetes mellitus among adults. This pilot study evaluated the feasibility and outcomes of implementing the Academy of Nutrition and Dietetics Evidence-Based Nutrition Practice Guidelines (EBNPGs) as part of medical care for patients newly diagnosed with type 2 diabetes mellitus. Seventy-five patients were recruited from 3 Lebanese hospitals, received nutrition care according to EBNPGs, and were followed up for 12 months. Patients achieved significant improvement in clinical outcomes between baseline and 3, 6, and 12 months. Further research is recommended to confirm the benefits of using EBNPGs.
- 2 June 2017
- Published by Springer Nature in Eating and Weight Disorders - Studies on Anorexia, Bulimia and Obesity
- Vol. 22 (3) , 421-433
Night eating syndrome and its association with weight status, physical activity, eating habits, smoking status, and sleep patterns among college students
Background Night eating syndrome (NES) is characterized by evening hyperphagia and/or nocturnal ingestion. Objective The main objective of this study was to assess the percentage of students complying with symptoms and behaviors consistent with the diagnostic criteria for NES, and explore its association with body mass index (BMI), dietary habits, physical activity, smoking status, and sleep patterns, among a sample of college students. Methods A cross-sectional survey was conducted among a sample of 413 undergraduate students, mean age of 20.6 ± 1.68 SD, at Central Michigan University. Students completed an online survey including demographic information and the Night Eating Diagnostic Questionnaire (NEDQ) and Pittsburgh Sleep Quality Index Questionnaire (PSQI). Participants were grouped based on self-reporting of the presence and frequency of night eating-related symptoms and behaviors related to the diagnostic criteria for NES as follows: normal, mild night eater, moderate night eater, and full-syndrome night eater. Pearson’s Chi-squared, Student’s t test, and Wilcoxon rank-sum test were used to test the association between students with and without any night eating behavior in relation to BMI, lifestyle variables, and sleep duration/quality. Results Results showed that the proportion of students complying with symptoms and behaviors consistent with full-syndrome of NES was 1.2%. There were no significant differences between students complying with symptoms and behaviors consistent with any level of NES and those without any night eating behavior regarding BMI, eating habits, physical activity, and smoking status. NES was significantly related to sleep duration (P = 0.023). Students complying with symptoms consistent with any level of NES reported shorter sleep time and had higher total PSQI score (6.73 ± 4.06) than students without the syndrome (5.61 ± 2.61) (P = 0.007). Conclusion Although the percentage of students complying with full-syndrome NES was relatively low in our student sample, those students had shorter sleep time and poorer sleep quality than the other groups. However, it is unclear whether evening hyperphagia is a response to a lack of sleep or vice versa, and further research is needed. Level of Evidence Level III, case-control analytic study.
- 2 June 2017
- Published by Springer Nature in Eating and Weight Disorders - Studies on Anorexia, Bulimia and Obesity
- Vol. 22 (3) , 421-433
Night eating syndrome and its association with weight status, physical activity, eating habits, smoking status, and sleep patterns among college students
Background Night eating syndrome (NES) is characterized by evening hyperphagia and/or nocturnal ingestion. Objective The main objective of this study was to assess the percentage of students complying with symptoms and behaviors consistent with the diagnostic criteria for NES, and explore its association with body mass index (BMI), dietary habits, physical activity, smoking status, and sleep patterns, among a sample of college students. Methods A cross-sectional survey was conducted among a sample of 413 undergraduate students, mean age of 20.6 ± 1.68 SD, at Central Michigan University. Students completed an online survey including demographic information and the Night Eating Diagnostic Questionnaire (NEDQ) and Pittsburgh Sleep Quality Index Questionnaire (PSQI). Participants were grouped based on self-reporting of the presence and frequency of night eating-related symptoms and behaviors related to the diagnostic criteria for NES as follows: normal, mild night eater, moderate night eater, and full-syndrome night eater. Pearson’s Chi-squared, Student’s t test, and Wilcoxon rank-sum test were used to test the association between students with and without any night eating behavior in relation to BMI, lifestyle variables, and sleep duration/quality. Results Results showed that the proportion of students complying with symptoms and behaviors consistent with full-syndrome of NES was 1.2%. There were no significant differences between students complying with symptoms and behaviors consistent with any level of NES and those without any night eating behavior regarding BMI, eating habits, physical activity, and smoking status. NES was significantly related to sleep duration (P = 0.023). Students complying with symptoms consistent with any level of NES reported shorter sleep time and had higher total PSQI score (6.73 ± 4.06) than students without the syndrome (5.61 ± 2.61) (P = 0.007). Conclusion Although the percentage of students complying with full-syndrome NES was relatively low in our student sample, those students had shorter sleep time and poorer sleep quality than the other groups. However, it is unclear whether evening hyperphagia is a response to a lack of sleep or vice versa, and further research is needed. Level of Evidence Level III, case-control analytic study.
- 24 January 2017
- Published by Springer Nature in Journal of Community Health
- Vol. 42 (4) , 674-687
Prevalence of Metabolic Syndrome and Its Individual Components Among Midwestern University Students
Michigan has the 17th highest adult obesity rate in the United States. Among college-aged adults between 18 and 25 years old, the rate of obesity was 11.6%. Obesity is a key precedent for the development of metabolic syndrome. Accordingly, the purpose of this study was to examine the prevalence of metabolic syndrome and its individual components among a sample of students at Central Michigan University. A cross-sectional survey was conducted among 462 students, aged 18–25 years, in Spring 2015 and Fall/Spring 2016 semesters. Students were recruited throughout the campus via flyers, in-class, and Blackboard announcements. Biochemical, anthropometric, and blood pressure measurements were taken for all students. Prevalence of metabolic syndrome was estimated based on the National Cholesterol Education Program’s Adult Treatment Panel III guidelines. Multivariable analysis was used to assess the prevalence of metabolic risk components. To explore the association between metabolic risk factors and lifestyle behaviors, students filled out a validated online questionnaire related to their eating habits, physical activity, and sleep patterns. Metabolic syndrome was not prevalent in our sample. However, about one-third of the students had at least one metabolic abnormality, and 6.0% had two metabolic abnormalities. The most common metabolic abnormalities were low HDL-cholesterol levels (22.0%) and high waist circumference (12.6%), and elevated serum triglyceride (5.8%). Adjusting for other factors, excess adiposity and high visceral fat scores were associated with increased risk of metabolic risk factors, whereas healthy lifestyle practices such as daily breakfast consumption, eating three meals a day, being active, and not smoking were associated with lower risks for MetS. Given the adverse consequences of undiagnosed metabolic abnormalities, efforts to identify and manage MetS among asymptomatic college students, particularly women, is essential and warrants further research.
- 24 January 2017
- Published by Springer Nature in Journal of Community Health
- Vol. 42 (4) , 674-687
Prevalence of Metabolic Syndrome and Its Individual Components Among Midwestern University Students
Michigan has the 17th highest adult obesity rate in the United States. Among college-aged adults between 18 and 25 years old, the rate of obesity was 11.6%. Obesity is a key precedent for the development of metabolic syndrome. Accordingly, the purpose of this study was to examine the prevalence of metabolic syndrome and its individual components among a sample of students at Central Michigan University. A cross-sectional survey was conducted among 462 students, aged 18–25 years, in Spring 2015 and Fall/Spring 2016 semesters. Students were recruited throughout the campus via flyers, in-class, and Blackboard announcements. Biochemical, anthropometric, and blood pressure measurements were taken for all students. Prevalence of metabolic syndrome was estimated based on the National Cholesterol Education Program’s Adult Treatment Panel III guidelines. Multivariable analysis was used to assess the prevalence of metabolic risk components. To explore the association between metabolic risk factors and lifestyle behaviors, students filled out a validated online questionnaire related to their eating habits, physical activity, and sleep patterns. Metabolic syndrome was not prevalent in our sample. However, about one-third of the students had at least one metabolic abnormality, and 6.0% had two metabolic abnormalities. The most common metabolic abnormalities were low HDL-cholesterol levels (22.0%) and high waist circumference (12.6%), and elevated serum triglyceride (5.8%). Adjusting for other factors, excess adiposity and high visceral fat scores were associated with increased risk of metabolic risk factors, whereas healthy lifestyle practices such as daily breakfast consumption, eating three meals a day, being active, and not smoking were associated with lower risks for MetS. Given the adverse consequences of undiagnosed metabolic abnormalities, efforts to identify and manage MetS among asymptomatic college students, particularly women, is essential and warrants further research.
- Open Access
- 4 October 2016
- Published by Springer Nature in BMC Public Health
- Vol. 16 (1) , 1-10
Level of nutrition knowledge and its association with fat consumption among college students
Intake of saturated fat, trans fat, and cholesterol has been associated with increased risk of coronary heart disease. The aim of this study was to explore whether increased nutrition knowledge is associated with a reduction in the consumption of unhealthy fats in a sample of university students. A sample of 231 students, with a mean age of 20 years, was recruited from university campus during spring 2012. Students completed a validated questionnaire related to students’ demographic, nutrition knowledge, and daily fat consumption. Weight, height, and waist circumference were measured. Data were analyzed using one-way ANOVA, chi-square, and student’s t-test. Results indicate that female students have greater nutrition knowledge than male students (the mean nutrition score for women was 5 points higher than that of men (P = 0.01)). Nutrition knowledge was negatively correlated with fat and cholesterol intake. Students who consumed more than 35 % calories from fat or >300 mg of cholesterol daily had lower mean nutrition scores than those students with lower fat or cholesterol intake (8 points lower and 7.9 points lower, respectively). Using linear regression for nutrition scores on estimated saturated fat intake and cholesterol intake (controlling for gender, height, weight, age, and dieting), nutrition scores were negatively associated with saturated fat intake (-0.15, P <0.0001) and cholesterol intake (-1.38, P <0.0001). Students with greater nutritional knowledge consumed less unhealthy fats and cholesterol. This finding magnifies the role of nutrition education as a potential tool in health campaigns to promote healthy eating patterns among college students. Results of this pilot study can inform the design of future nutrition education intervention studies to assess the efficacy of nutrition knowledge on pattern of fat consumption among college students.
- 4 October 2016
- Published by Springer Nature in BMC Public Health
- Vol. 16 (1) , 1-10
Open AccessLevel of nutrition knowledge and its association with fat consumption among college students
Intake of saturated fat, trans fat, and cholesterol has been associated with increased risk of coronary heart disease. The aim of this study was to explore whether increased nutrition knowledge is associated with a reduction in the consumption of unhealthy fats in a sample of university students. A sample of 231 students, with a mean age of 20 years, was recruited from university campus during spring 2012. Students completed a validated questionnaire related to students’ demographic, nutrition knowledge, and daily fat consumption. Weight, height, and waist circumference were measured. Data were analyzed using one-way ANOVA, chi-square, and student’s t-test. Results indicate that female students have greater nutrition knowledge than male students (the mean nutrition score for women was 5 points higher than that of men (P = 0.01)). Nutrition knowledge was negatively correlated with fat and cholesterol intake. Students who consumed more than 35 % calories from fat or >300 mg of cholesterol daily had lower mean nutrition scores than those students with lower fat or cholesterol intake (8 points lower and 7.9 points lower, respectively). Using linear regression for nutrition scores on estimated saturated fat intake and cholesterol intake (controlling for gender, height, weight, age, and dieting), nutrition scores were negatively associated with saturated fat intake (-0.15, P <0.0001) and cholesterol intake (-1.38, P <0.0001). Students with greater nutritional knowledge consumed less unhealthy fats and cholesterol. This finding magnifies the role of nutrition education as a potential tool in health campaigns to promote healthy eating patterns among college students. Results of this pilot study can inform the design of future nutrition education intervention studies to assess the efficacy of nutrition knowledge on pattern of fat consumption among college students.
- 16 October 2015
- Published by SAGE Publications in Perspectives in Public Health
- Vol. 136 (4) , 231-244
Assessment of weight status, dietary habits and beliefs, physical activity, and nutritional knowledge among university students
The purpose of this study was to assess weight status, dietary habits, physical activity, dietary beliefs, and nutrition knowledge among a sample of students from Central Michigan University. A cross-sectional survey was conducted among a sample of undergraduate students in Fall 2011 and Spring 2012 at Central Michigan University. Participating students completed an online questionnaire that included questions related to their eating habits, physical activity and lifestyle, dietary beliefs, and nutritional knowledge. Weight, height, and waist circumference were measured. Percentage body fat and visceral fat score were determined using a Tanita body composition analyser (SC-331S). Outcomes of this study indicated that 78% of female students were within the healthy weight range compared to 52% of male students. Visceral body fat and waist circumference scores were higher in males than in females. Most students showed ‘satisfactory’ dietary habits. Almost half of the students reported drinking two glasses of milk and consuming two cups of fruits and vegetables daily. Physical activity and lifestyle score indicated that most of the students were not physically active. Only 7% of students reported having a very active lifestyle, and 4% had quite good nutritional knowledge. The majority of students, particularly females, were within the healthy body weight range. Students’ dietary habits were satisfactory. However, physical activity, students’ knowledge of healthy and unhealthy diet habits, and nutritional knowledge needed improvement. Developing gender-specific programmes for promoting healthy lifestyle behaviours among students is recommended.
- 16 October 2015
- Published by SAGE Publications in Perspectives in Public Health
- Vol. 136 (4) , 231-244
Assessment of weight status, dietary habits and beliefs, physical activity, and nutritional knowledge among university students
The purpose of this study was to assess weight status, dietary habits, physical activity, dietary beliefs, and nutrition knowledge among a sample of students from Central Michigan University. A cross-sectional survey was conducted among a sample of undergraduate students in Fall 2011 and Spring 2012 at Central Michigan University. Participating students completed an online questionnaire that included questions related to their eating habits, physical activity and lifestyle, dietary beliefs, and nutritional knowledge. Weight, height, and waist circumference were measured. Percentage body fat and visceral fat score were determined using a Tanita body composition analyser (SC-331S). Outcomes of this study indicated that 78% of female students were within the healthy weight range compared to 52% of male students. Visceral body fat and waist circumference scores were higher in males than in females. Most students showed ‘satisfactory’ dietary habits. Almost half of the students reported drinking two glasses of milk and consuming two cups of fruits and vegetables daily. Physical activity and lifestyle score indicated that most of the students were not physically active. Only 7% of students reported having a very active lifestyle, and 4% had quite good nutritional knowledge. The majority of students, particularly females, were within the healthy body weight range. Students’ dietary habits were satisfactory. However, physical activity, students’ knowledge of healthy and unhealthy diet habits, and nutritional knowledge needed improvement. Developing gender-specific programmes for promoting healthy lifestyle behaviours among students is recommended.
- Open Access
- 15 October 2014
- Published by Springer Nature in Diabetology & Metabolic Syndrome
- Vol. 6 (1) , 111
Assessment of college students’ awareness and knowledge about conditions relevant to metabolic syndrome
Despite the increasing prevalence of metabolic syndrome among young adults, little is known about the awareness level of college students about this condition. The purpose of this study was to assess students’ level of awareness and knowledge about conditions relevant to metabolic syndrome (MetS). A self-reported online questionnaire was administered to 243 students attending Central Michigan University. Questions were divided into seven conditions: diabetes, adiposity, hypertension, high serum cholesterol, arteriosclerosis, stroke, and myocardial infarction. Students’ responses were scored and interpreted as follows: poor knowledge if ≤50% of students answered the question correctly; fair knowledge if between 51-80% of students answered the question correctly; and good knowledge if between 81-100% of students answered the question correctly. Anthropometric measurements including height, weight, waist circumference, percentage body fat, and visceral fat score were measured. Fisher’s exact test was used to test the differences in students’ responses. A p value <0.05 was considered a statistically significant difference. More than 80% of students correctly identified symptoms and complications of diabetes, hypertension, arteriosclerosis, myocardial infarction and stroke, and 92% identified adiposity as a risk factor for heart disease. There were few false beliefs held by students on questionnaire items. For example, 58% of male students falsely believed that individuals with diabetes may only eat special kinds of sweets compared to 39% of females (p < 0.01) and more than half of the students falsely identified liposuction as the best possible treatment in adiposity therapy. Gender, Health Science major, and year in school were found to be positively associated with more knowledge. The findings in this study suggest that students’ knowledge about conditions relevant to metabolic syndrome can be improved. In this essence, raising awareness about MetS based on students’ pre-existing knowledge is essential to enhance students’ wellness.
- 15 October 2014
- Published by Springer Nature in Diabetology & Metabolic Syndrome
- Vol. 6 (1) , 111
Open AccessAssessment of college students’ awareness and knowledge about conditions relevant to metabolic syndrome
Despite the increasing prevalence of metabolic syndrome among young adults, little is known about the awareness level of college students about this condition. The purpose of this study was to assess students’ level of awareness and knowledge about conditions relevant to metabolic syndrome (MetS). A self-reported online questionnaire was administered to 243 students attending Central Michigan University. Questions were divided into seven conditions: diabetes, adiposity, hypertension, high serum cholesterol, arteriosclerosis, stroke, and myocardial infarction. Students’ responses were scored and interpreted as follows: poor knowledge if ≤50% of students answered the question correctly; fair knowledge if between 51-80% of students answered the question correctly; and good knowledge if between 81-100% of students answered the question correctly. Anthropometric measurements including height, weight, waist circumference, percentage body fat, and visceral fat score were measured. Fisher’s exact test was used to test the differences in students’ responses. A p value <0.05 was considered a statistically significant difference. More than 80% of students correctly identified symptoms and complications of diabetes, hypertension, arteriosclerosis, myocardial infarction and stroke, and 92% identified adiposity as a risk factor for heart disease. There were few false beliefs held by students on questionnaire items. For example, 58% of male students falsely believed that individuals with diabetes may only eat special kinds of sweets compared to 39% of females (p < 0.01) and more than half of the students falsely identified liposuction as the best possible treatment in adiposity therapy. Gender, Health Science major, and year in school were found to be positively associated with more knowledge. The findings in this study suggest that students’ knowledge about conditions relevant to metabolic syndrome can be improved. In this essence, raising awareness about MetS based on students’ pre-existing knowledge is essential to enhance students’ wellness.