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Featured researches published by M.A. Koelen.


European Journal of Clinical Nutrition | 2005

Role of social support in lifestyle-focused weight management interventions

M.W. Verheijden; J.C. Bakx; C. van Weel; M.A. Koelen; W.A. van Staveren

Social support is important to achieve beneficial changes in risk factors for disease, such as overweight and obesity. This paper presents the theoretical and practical framework for social support, and the mechanisms by which social support affects body weight. The theoretical and practical framework is supported with a literature review addressing studies involving a social support intervention for weight loss and weight loss maintenance.A major aspect in social support research and practice is the distinction between structural and functional support. Structural support refers to the availability of potential support-givers, while functional support refers to the perception of support. Interventions often affect structural support, for example, through peer groups, yet functional support shows a stronger correlation with health. Although positive correlations between social support and health have been shown, social support may also counteract health behaviour change.Most interventions discussed in this review showed positive health outcomes. Surprisingly, social support was clearly defined on a practical level in hardly any studies, and social support was assessed as an outcome variable in even fewer studies. Future social support intervention research would benefit from clear definitions of social support, a clear description of the intended mechanism of action and the actual intervention, and the inclusion of perceived social support as a study outcome.


International Journal of Behavioral Nutrition and Physical Activity | 2007

Cognitive development and children's perceptions of fruit and vegetables; a qualitative study

Gertrude G. Zeinstra; M.A. Koelen; Frans J. Kok; Cees de Graaf

BackgroundMost children do not meet the recommended guidelines for fruit and vegetable intake. Since preference is an important predictor of intake, more knowledge is needed about childrens preferences and about how these preferences develop. As most research about preferences has ignored cognitive development, this study was designed to explore the relation between childrens perceptions and preferences for fruit and vegetables and their cognitive development.MethodsThe study population consisted of eight 4–5-year-old children, eight 7–8-year-old children and twelve 11–12-year-old children, recruited via a primary school in Wageningen, The Netherlands. Qualitative in-depth information was obtained by duo-interviews and focus group discussions. A structured guide with questions and game tasks was applied to address different domains in a consistent way.ResultsThe developmental progress at the abstraction level was seen in childrens reasoning across all domains. Childrens preferences expanded and increased in complexity as they moved to a higher age bracket. The most important determinants for liking and disliking shifted from appearance and texture attributes in 4–5-year-olds towards taste attributes in 11–12-year-olds. Childrens knowledge of basic tastes increased. Their understanding of health improved as they grew older. The emergence of social norms and perspectives of others as the children grew older was also seen in relation to fruit and vegetables. Child-reported parental strategies to stimulate healthy eating appeared to vary with age in line with cognitive development.ConclusionCognitive development is paralleled by changes in the importance given to the attributes that determine whether a child likes or dislikes fruits and vegetables; childrens understanding of and reasoning about health; and parental use of strategies. These developmental differences should be incorporated in programs designed to increase long-term fruit and vegetable intake in children.


European Journal of Clinical Nutrition | 2005

Nutrition-related information-seeking behaviours before and throughout the course of pregnancy: consequences for nutrition communication

Ellen M. Szwajcer; G.J. Hiddink; M.A. Koelen; C.M.J. van Woerkum

Background:Research has shown that especially pregnant women, and also women with a wish for a child, have increased nutrition awareness. Seeking nutrition information seemed to be an important determinant for nutrition awareness. However, little research has been carried out about nutrition-related information-seeking behaviours before and during pregnancy.Objective:This study aimed to explore nutrition-related information sources, nutrition information-seeking behaviours and motives for seeking nutrition information before and throughout the course of pregnancy.Design:Data were collected by means of retrospective in-depth face-to-face interviews of 1 h with five groups of 12 women: women with a child wish, women in their first, second and third trimester of the first pregnancy and women in their first trimester of the second pregnancy. Women were mainly selected via midwifery practices. The interviews took place at conference rooms or at the respondents home. Qualitative data were analysed with the software program NUD*IST (QSR, Melbourne). This was based on the research objectives and relevant text segments of transcripts.Results:Women with a child wish generally sought little nutrition information because they were not pregnant yet. Information sources were the Internet (anonymous) and the social environment (models). In relation to the manifestation of nutrition-related information-seeking behaviours during first-time pregnancies, three groups of women could be distinguished: (1) women who feel like a mother from the moment they know that they are pregnant, (2) women who feel like a mother later in pregnancy and (3) women who do not feel like a mother yet. Each group had its own specific information-seeking behaviour. Important information sources of the first group were the Internet (anonymous and up to date), books (extended) and midwives (expert) during the first trimester; the 9-month calendar (fun and tips), friends (experienced) in the second trimester; and friends (information on breastfeeding) in the third trimester. Information sources of the second group of women were mainly brochures provided by the midwife and the midwife herself. The third group of women mainly relied on their own common sense. Second-time pregnant women mainly relied on their experience, the midwife and books for specific questions.Conclusions:Pregnant women perceive pregnancy-specific nutrition information as important because it is one of the few things that they can apply in their daily lives to protect the health of the fetus. Nutrition-related information-seeking behaviours mainly were pregnancy specific in character, rather than directed to general nutrition information.Sponsorship:Dutch Dairy Association, Zoetermeer, the Netherlands.


The American Journal of Clinical Nutrition | 2003

Understanding nutrition communication between health professionals and consumers: development of a model for nutrition awareness based on qualitative consumer research

Sonja Me van Dillen; G.J. Hiddink; M.A. Koelen; Cees de Graaf; Cees van Woerkum

BACKGROUND Consumers have been exposed to nutrition information from a variety of sources, including the family doctor. They are often not aware of their own risk behavior regarding nutrition. OBJECTIVE This study sought to assess food associations, conversation topics, interest in food topics, and use of information sources by means of qualitative consumer research. Another aim was to provide a hypothetical model for nutrition awareness that could be tested in a quantitative survey. DESIGN Three focus groups with 30 Dutch consumers altogether were carried out. Qualitative data were analyzed with the computer software program NUD*IST (QSR, Melbourne) by sorting text blocks into categories, and new themes emerged. In addition, a hypothetical model for nutrition awareness was developed. RESULTS Consumers associated food most often with safe food, and food safety was the topic most often discussed. Tasty food was the most important food conversation topic. The family doctor was the information source most talked about. Furthermore, consumers possibly lacked some nutrition awareness. CONCLUSIONS Careful analysis revealed new themes (new in the past 10 y), such as concerns about food safety and reconsideration of the roles of family doctors and dietitians. Based on these themes, recommendations for nutrition communication were composed.


Global Health Promotion | 2009

Elaborating on systems thinking in health promotion practice

Jenneken Naaldenberg; Lenneke Vaandrager; M.A. Koelen; Annemarie Wagemakers; Hans Saan; Kees de Hoog

Health and well-being are the result of a series of complex processes in which an individual interacts with other people and the environment. A systematic approach ensures incorporation of individual, ecological, social and political factors. However, interactions between these factors can be overlooked within a systematical approach. A systemic approach can provide additional information by incorporating interactions and communication. The opportunities of a systems thinking perspective for health promotion were investigated for this paper. Although others have also made attempts to explore systems thinking in the field of health promotion, the implications of systems thinking in practice need attention. Other fields such as agricultural extension studies, organizational studies and development studies provide useful experiences with the use of a systems thinking perspective in practice. Building on experiences from these fields, we give a theoretical background in which processes of social learning and innovation play an important role. From this background, we derive an overview of important concepts for the practical application of a systems thinking perspective. These concepts are the structure of the system, meanings attached to actions, and power relations between actors. To make these concepts more explicit and reduce the theoretical character of systems thinking, we use an illustration to elaborate on these concepts in practice. For this purpose, we describe a health promotion partnership in The Netherlands using the concepts structure, meaning and power relations. We show how a systems perspective increases insight in the functioning of a partnership and how this can facilitate processes of social learning and innovation. This article concludes by identifying future opportunities and challenges in adopting systems thinking for health promotion practice. A systems perspective towards health promotion can help projects reaching a more integral and sustainable approach in which the complex nature of health promotion processes is supported. Practical applications of systems thinking are necessary to adapt this perspective. (Global Health Promotion, 2009; 16 (1): pp. 39—47)


European Journal of Clinical Nutrition | 2004

Perceived relevance and information needs regarding food topics and preferred information sources among Dutch adults: results of a quantitative consumer study

S.M.E. van Dillen; G.J. Hiddink; M.A. Koelen; C. de Graaf; C.M.J. van Woerkum

Objective: For more effective nutrition communication, it is crucial to identify sources from which consumers seek information. Our purpose was to assess perceived relevance and information needs regarding food topics, and preferred information sources by means of quantitative consumer research.Design: Based on qualitative studies, a quantitative questionnaire was developed and administered in face-to-face interviews.Subjects: The study population consisted of Dutch adults aged 18–80 y. A stratified sample of 923 adults was taken from the GfK ScriptPanel; 603 respondents completed the questionnaire.Results: Despite high perceived relevance of food topics regarding dietary guidelines (55–78%), most respondents indicated that they did not want more information about these topics (71–74%). Furthermore, our study revealed information needs regarding safety- and health-related food topics (up to 77% in some subgroups). Differences in perceived relevance and information needs were found in subgroups based on gender, age, perceived weight and socioeconomic status. Education offices of the food sector and the family doctor were mentioned for most food topics, who ranked among the highest regarding perceived reliability, perceived expertise, clearness and accessibility.Conclusions: With respect to five food topics (losing weight, sports and nutrition, lowering cholesterol, carbohydrates and food composition), interested subgroups should receive tailored information. For other groups and food topics, a population-wide strategy should suffice, utilising the preferred information source. If people who are not yet interested become interested through a life event, information on demand can be put into action.Sponsorship: Dutch Dairy Association.


Evaluation and Program Planning | 2010

Community health promotion: A framework to facilitate and evaluate supportive social environments for health

Annemarie Wagemakers; Lenneke Vaandrager; M.A. Koelen; Hans Saan; Cees Leeuwis

The evaluation of community health promotion designed to create supportive social environments for health is still in its infancy. There is a lack of consensus on concepts, a lack of information on interventions that bring about social change, and a lack of feasible methods and tools. Consequently, the effectiveness of community health promotion may not be evaluated under all relevant headings. Therefore, this study aims to contribute to the evaluation of change in the social environment by presenting a framework. On the basis of the relevant literature we describe the relation between social environment and health predicting mediators. We selected participation and collaboration as core concepts in moderating the social environment of health because these terms give insight into the actual dynamics of health promotion practice. We synthesize the results into a framework with operational variables and offer four guidelines on how to apply the framework: use the variables as a menu, set specific aims for social change processes, use an action research approach, and triangulate data. The framework and guidelines enable the start-up, facilitation and evaluation of social change and learning processes and provide common ground for researchers and practitioners to improve the practice of their professions.


Family Practice | 2008

Nutrition-related information-seeking behaviours of women trying to conceive and pregnant women: evidence for the life course perspective

Ellen M. Szwajcer; G.J. Hiddink; L.C. Maas; M.A. Koelen; C.M.J. van Woerkum

OBJECTIVES To examine whether preconception and pregnancy could be an occasion triggering womens interest, search and need for both general and pregnancy-specific nutrition-related information, in order to: (i) provide a greater understanding of the life course perspective (in this case on nutrition behaviours and pregnancy) and (ii) to contribute to the rationale of nutrition interventions aimed at women of child-bearing age. METHODS Data were collected in a cross-sectional study with the aid of a face-to-face interview. The sample consisted of four groups each of about 100 Dutch nulliparous women each: women trying to conceive and women in the first, second or third trimester of their first pregnancy. RESULTS Pregnant women were more interested in nutrition information than before preconception and before pregnancy, especially the first-trimester group. The frequency of search for nutrition information differed significantly between the groups: the first-trimester group searched for information most frequently. Women wanting to conceive and women in their third trimester of pregnancy found significantly more pregnancy-specific information topics than women in their first and second trimester of pregnancy. Women wanting to conceive had significantly higher needs for general and specific nutrition-related topics compared to pregnant women. Overall, the Internet, the midwife and books were the favourite information sources. CONCLUSIONS The study provided indications that preconception and pregnancy are moments in life that lead to an increased interest, need and search for particularly pregnancy-specific nutrition-related information. This should be borne in mind when healthy nutrition promotion activities are being developed.


Journal of Applied Gerontology | 2012

Aging Populations’ Everyday Life Perspectives on Healthy Aging: New Insights for Policy and Strategies at the Local Level

Jenneken Naaldenberg; Lenneke Vaandrager; M.A. Koelen; Cees Leeuwis

Population aging makes policy makers face the challenge of supporting people as they age. Strategies designed to promote healthy aging should take the viewpoints of this target group into account. To strengthen interventions on healthy aging, this study aims to investigate how aging individuals experience healthy aging in their locality. A salutogenic background is used to ensure a broad perspective on health. Data collected from 79 in-depth interviews (using an appreciative inquiry approach) in the Netherlands were analyzed for interviewees’ experiences on healthy aging. Results indicate that healthy aging is perceived within the context of everyday life, and interviewees who are content with their health often have an assets-based and positive view on health. Often, however, interventions and facilities address isolated health themes, and such an approach does not match well with these perceptions. Framing interventions positively in terms of assets, resources, and everyday life may increase their effectiveness.


Global Health Promotion | 2010

Coordinated action checklist: a tool for partnerships to facilitate and evaluate community health promotion

Annemarie Wagemakers; M.A. Koelen; Jeanette Lezwijn; Lenneke Vaandrager

Coordinated action through partnerships is a core approach in community health promotion to deal with the multidimensionality of today’s health and societal issues. The number of partnerships is increasing. However, facilitation and evaluation of partnerships is hampered by the lack and/or non-use of feasible tools. As a consequence, health promotion through partnerships is not optimally facilitated and evaluated. This article describes the development and piloting of a tool and guidelines to facilitate and evaluate coordinated action in community health promotion. The initial development of the tool was based on relevant literature, a conceptual framework to support social environments for health, and an inventory of existing tools. Appreciative inquiry principles contributed to the formulation of items. The result, a checklist for coordinated action, was further developed and assessed for usability in six different partnerships: a national program, an academic collaborative and four local partnerships. Results of the checklist were cross-checked and discussed with partners. Piloting the checklist resulted in a feasible tool helpful to partnerships because of its ability to generate actionable knowledge. The checklist enables the facilitation and evaluation of community health promotion partnerships that differ in context and level (both local and national), phase of the program and topics addressed. Cross-checking and discussing results with partners and triangulation with interview data increases the reliability of the results of the checklist. Piloting in multiple cases contributes to the checklist’s external validity.

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Annemarie Wagemakers

Wageningen University and Research Centre

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G.J. Hiddink

Wageningen University and Research Centre

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Lenneke Vaandrager

Wageningen University and Research Centre

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C.M.J. van Woerkum

Wageningen University and Research Centre

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M.C. Herens

Wageningen University and Research Centre

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Kirsten T. Verkooijen

Wageningen University and Research Centre

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C. de Graaf

Wageningen University and Research Centre

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S.M.E. van Dillen

Wageningen University and Research Centre

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E. Smit

Radboud University Nijmegen

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G.R.M. Molleman

Radboud University Nijmegen

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