Stephane Frayon

Stephane Frayon
University of New Caledonia | UNC · LIRE

Ph.D

About

33
Publications
16,090
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236
Citations
Additional affiliations
January 2008 - May 2015
University of New Caledonia
Position
  • Professor

Publications

Publications (33)
Article
In the Melanesian culture, traditional activities are organized around family farming, although the lifestyle transition taking place over the last several decades has led to imbalances in diet and physical activity, with both leading to obesity. The aim of this interdisciplinary study was to understand the links between family farming (produced, e...
Preprint
In the Melanesian culture, traditional activities are organized around family farming, although the lifestyle transition taking place over the last several decades has led to imbalances in diet and physical activity, with both leading to obesity. The aim of this interdisciplinary study was to understand the links between family farming (produced, e...
Article
Full-text available
Physical activity (PA) is an important factor for the prevention of overweight and obesity, particularly during adolescence. This study focuses on the understudied adolescent population of New Caledonia with the aim to (1) determine the daily PA levels and estimate the sedentary time through out-of-school sitting time; (2) highlight the influence o...
Article
Full-text available
Background Self-esteem has consistently been observed to be relatively low in adolescents with obesity. In the Pacific region, the prevalence of obesity in adolescence is high, but few studies have considered issues of self-esteem in this population. Objective To examine associations between weight status, body dissatisfaction and self-esteem in a...
Article
Full-text available
In recent decades, the food cultures of the Pacific populations have undergone a profound transition, particularly because the increasing trade exchanges with Western countries have facilitated access to a wide range of processed foods. Essentially, a new normative model of eating is now taking the place of the traditional models. The aims of this...
Article
Full-text available
Background A high prevalence of overweight and obesity has been found in adolescents of New Caledonia and other Pacific Island Countries and Territories. Although Westernization may contribute to the weight gain in populations of Oceanian, Non-European, Non-Asian ancestry (ONENA), little is known about the sociodemographic and lifestyle factors ass...
Article
Full-text available
Background: Food consumption, sleep duration and overweight were assessed in rural and urban Melanesian adolescents. Methods: A cross-sectional survey of 312 rural and 104 urban adolescents (11-16 years old) was conducted. Food intakes were assessed by a 26-item food frequency questionnaire and then categorised into the number of serves from eac...
Book
The entire program in 13 chapters and 336 pages: - 66 double-page activities at the heart of science, with more than 25 interviews with researchers (climatologists, paleoanthropologists, economists, demographers, linguists, oceanographers, etc.) and 9 activities to work on critical thinking about issues at the science/society interface - 208 exerci...
Book
L'ensemble du programme en 20 chapitres et 544 pages. 5 thèmes : Génétiques et évolution, A la recherche du passé géologique de notre planète, De la plante sauvage à la plante domestiquée, Les climats de la Terre, Le corps humain et santé. 18 professionnels présentent leur leur parcours et leur métiers. 12 fiches et 8 vidéos pour préparer le Gr...
Article
Objective Vaccine hesitancy is increasing worldwide and the World Health Organisation has declared it to be one of the 10 threats for global health in 2019. Lack of confidence in vaccines and fear of side effects seem to be the key reasons. Education may help restore confidence, and middle and high school biology teachers may have a particularly po...
Book
https://theconversation.com/comprendre-la-pandemie-de-surpoids-et-dobesite-qui-touche-le-pacifique-insulaire-lexemple-de-la-nouvelle-caledonie-145907 Cet article est publié dans le cadre de la Fête de la science 2020 (du 2 au 12 octobre 2020 en métropole et du 6 au 16 novembre en Corse, en outre-mer et à l’international) dont The Conversation Fran...
Poster
Full-text available
Objectives: In recent decades, food cultures of the Pacific populations have undergone a sharp transition, particularly caused by the fact that trade exchanges with western countries facilitate access to a wide range of processed foods. This already has a major incidence on chronic diseases in the next decades since today 35% of 11-16 years old New...
Article
Objectives: The first aim was to examine New Caledonian adolescents' views of what constitutes an overweight or underweight person. The second aim was to assess whether an environment with a high prevalence of overweight is associated with different norms of overweight or underweight in this population. Methods: The Stunkard Figure Rating Scale...
Article
Full-text available
Objective Energy drinks are very popular among teenagers but may cause health problems. Energy drink consumption is partly associated with energy drink perception, but little is known about this in the Pacific Island Countries and Territories. The aim of this cross-sectional study was to identify the relationships between energy drink consumption,...
Data
Dataset used in this study. (XLSX)
Article
Full-text available
This cross-sectional study assessed sugar-sweetened beverage (SSB) consumption and its associations with the sociodemographic and physical characteristics, behavior and knowledge of New Caledonian adolescents. The survey data of 447 adolescents from ages 11 to 16 years were collected in five secondary public schools of New Caledonia between July 20...
Article
Full-text available
The Pacific Islands are experiencing an obesity epidemic with a rate of overweight and obesity as high as 80% among adults in some Pacific Island nations. Children and adolescents in the region are also affected by overweight and obesity, which is alarming due to the increased likelihood of remaining overweight as an adult. Research supports an ass...
Article
Full-text available
Introduction: Waist-to-height ratio (WHtR) is a simple anthropometric proxy for central body fat; it is easy to use from a health education perspective. A WHtR value >0.5 has been proposed as a first level indicator of health risk. The first aim of this study was to compare WHtR with values based on body mass index (BMI) in their prediction of the...
Article
Objective(s): The prevalence of adolescent obesity is high among the various ethnic groups native to the Pacific region (European, Melanesian and Polynesian). An important factor of weight gain or loss is body size satisfaction; however, little is known about adolescent body self-perception in the Pacific region. Design: Body dissatisfaction was...
Article
Full-text available
We evaluated anthropometric characteristics and physical fitness in 556 Melanesian adolescents from rural and urban New Caledonia to build health education programs focused on physical activity. In 2013, body weight, height, skinfold thickness, lean body mass (LBM), percentage fat body mass (%FBM), physical fitness (power, agility, speed, maximal a...
Article
We examined the accuracy of self-reported weight and height in New Caledonian school-going adolescents. Self-reported and measured height and weight data were collected from 665 adolescents of New Caledonia and were then compared. Multivariable logistic regressions identified the factors associated with inaccurate self-reports. Sensitivity and spec...
Article
Background: Body mass index is the most often used indicator of obesity but does not distinguish between lean and fat mass. Adiposity at the same body mass index differs across ethnic groups. Objectives: The twofold aim of this study was to determine whether body mass index (BMI)-based references are correlated with body fat percentage (%BF) in...
Article
Objectives: New Caledonia is a multi-ethnic French territory in the Pacific, characterized by communities with widely varying nutritional habits. Little is currently known about adolescent food behaviors and habits and their association with overweight. This study therefore determined the sociodemographic factors and food behaviors associated with...
Article
Full-text available
Background Adolescent obesity is prevalent in Pacific region ethnic groups (European, Melanesian and Polynesian) living in both urban and rural areas. Although body perception is an important factor of weight gain or loss, little is known about the body self-perceptions of Pacific region adolescents. This study therefore evaluated adolescent percep...
Article
Full-text available
Aim. - Analyze the effects of exercise training on cardiac sarco endoplasmic reticulum calcium ATPase (SERCA) 2 gene expression of genetically obese Zucker rats, an animal model of non-insulin dependent diabetes mellitus (NIDDM). Methods. - Twenty male and 20 female Zucker fatty rats ran 30-50 min/d at 35-40% VO2max, 6 d/week for 13 weeks. Semi-qua...
Article
Full-text available
The molecular characterization of the human PLC beta1 gene was just reported by Peruzzi et al. [Biochim. Biophys. Acta 1582 (2002) 46]. This prompted us to investigate the effects of dexamethasone on PLC beta1 expression in two types of human vascular smooth muscle cells--coronary artery smooth muscle cells (hCASMC) and aortic smooth muscle cells (...
Article
Full-text available
A recent report has shown that in vitro the RAMP2/CRLR complex is a functional adrenomedullin receptor in human endothelial and vascular smooth muscle cells. However, in vivo, it is well known that CGRP receptors are expressed in human coronary arteries and that a beneficial effect is observed in patients after CGRP infusion of patients with conges...
Article
Full-text available
Golf alpha (a G heterotrimeric protein which shares a high homology with Gs alpha) expression was studied in the rat heart before birth and until weaning. Since Golf alpha in the neuro-olfactory epithelium is coupled to olfactory receptors and type III adenylyl cyclase, we looked for the presence of such molecules in the heart. Golf alpha mRNA was...
Article
Full-text available
Recent reports using immunohistochemistry have shown that Galphaolf which shares 88% homology with Galphas was expressed in pancreatic islets. To test the specificity of the expression of this G protein isotype in rat islet cells, B and non-B cells were separated by flow cytometry. The expression of Galphaolf and adenylyl cyclases (AC) of types II,...

Questions

Questions (5)
Question
Hi,
I used to analyse data using linear regression model.
I want now to analysis my data using mixed model because participants are nested within classes which are nested within schools. Aim is to determine if mixed model is necessary or if linear model is enough.
I put in spss classes and schools in subjects and used it has random effects. I don't understand if i have to put the two subjects (classes and schools) in the same combinaison box or if i have to put it one by one in different step ?
I try to put it step by step in an ampty model (without covariable) and obtain two value, one for schools and one for classes. In all the case, the ICC were low (0,022 for classes and 0,025 for school). If i well understand this low value means that a mixed model is not necessary ?
Seconde problem is what i have to do if spss declare that covariant is redondant so there is no variance value : i cannot calculate ICC ? It means that ICC is=0 ? I've got that problem for a second variable i analysed (ICC for classes =0.0026 and no value for schools).
Thanks for your help
Question
As a part of a project on factors associated with overweight in a french adolescents population, we need to evaluate body image (dis)satisfaction on this population. A lot of scale exist in the litterature : body image questionnaire, body satisfaction scale (BSS), body shape questionaire, body image dissatisfaction subscale, Body image scale, body appreciation scale (version 1 and 2). We used for another study the stunkard figure rating score but this old method seems not to be used anymore...
May be somebody had good advice or a good reference to make the better choice for this kind of scale ? if possible a french version ?
Question
In SPSS 22.0, i obtain value for b and for beta (standardised coefficient) for each variable i use in my multiple linear regression modelization. However, confindence intervall are given for B value, not for beta value ? Can i use the same standard deviation for determining the 95% CI ?
Thank you .
Question
I would like to observe phagocytosis with my students with earthworm coelomocytes. I extract coelomocytes with cold-shock and obtain a lot of cells. I depose on a slide a drop of the coelom liquid and leave for 15 min for ahesion of cell on slide. After that i put a drop of yeast and incubate at room temperature for 30 min. I slowly wash the slide with distilled water and stain with methylene blue for 1 min. I can observe a lot of cell like in the attach file but i cannot say if the blue things inside the cell are yeast or cytplasmic inclusion or vacuole. Is the yeast attach to the cell or to the slide? 
As anyone as an experience of this model and can take a look ?
Question
I'm looking for a french version of a validate scale like AFA (Anti Fat attitudes questionnaire), ATOP (Attitudes toward Obese Persons scale), FBS (Fat phobia scale) or UMB-FAT (Universal Measure of bias-Fat scale) for french young people (11 to 17).
thank you for your help !

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Projects

Projects (3)
Project
The goal is to promote and revitalise family agriculture to improve the health of Pacific populations and ensure food security in the context of rapid social and economic transformations and climate change, which effect are particularity harmful to Pacific islands.
Project
The Melanesian and Polynesian populations living in New Caledonia have a high prevalence of overweight and obesity. However, little is known about the factors associated with this heightened risk of overweight in these Pacific populations. Previous studies have examined the Pacific islanders separately because they often lived in very different areas. However, New Caledonia today has a highly diverse population: high and low income, rural and urban, and a range of ethnic groups with substantial cultural differences. We think that New Caledonia can be considered as 'open laboratory', with all the diversity of the Pacific region living on one island.