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Featured researches published by Julia Díez.


Journal of Urban Health-bulletin of The New York Academy of Medicine | 2015

Assessing Walking and Cycling Environments in the Streets of Madrid: Comparing On-Field and Virtual Audits

Pedro Gullón; Hannah Badland; Silvia Alfayate; Usama Bilal; Francisco Escobar; Alba Cebrecos; Julia Díez; Manuel Franco

Audit tools are useful for exploring the urban environment and its association with physical activity. Virtual auditing options are becoming increasingly available potentially reducing the resources needed to conduct these assessments. Only a few studies have explored the use of virtual audit tools. Our objective is to test if the Madrid Systematic Pedestrian and Cycling Environment Scan (M-SPACES) discriminates between areas with different urban forms and to validate virtual street auditing using M-SPACES. Three areas (N = 500 street segments) were selected for variation in population density. M-SPACES was used to audit street segments physically and virtually (Google Street View) by two researchers in 2013–2014. For both physical and virtual audits, all analyzed features score significantly different by area (p < 0.05). Most of the features showed substantial (ICC = 0.6–0.8) or almost perfect (ICC ≥ 0.8) agreement between virtual and physical audits, especially neighborhood permeability walking infrastructure, traffic safety, streetscape aesthetics, and destinations. Intra-rater agreement was generally acceptable (ICC > 0.6). Inter-rater agreement was generally poor (ICC < 0.4). Virtual auditing provides a valid and feasible way of measuring residential urban environments. Comprehensive auditor training may be needed to guarantee good inter-rater agreement.


International Journal of Environmental Research and Public Health | 2018

A Community-Driven Approach to Generate Urban Policy Recommendations for Obesity Prevention

Julia Díez; Pedro Gullón; María Sandín Vázquez; Belén Álvarez; María del Prado Martín; María Urtasun; Maite Gamarra; Joel Gittelsohn; Manuel Franco

There is an increasing research interest in targeting interventions at the neighborhood level to prevent obesity. Healthy urban environments require including residents’ perspectives to help understanding how urban environments relate to residents’ food choices and physical activity levels. We describe an innovative community-driven process aimed to develop environmental recommendations for obesity prevention. We conducted this study in a low-income area in Madrid (Spain), using a collaborative citizen science approach. First, 36 participants of two previous Photovoice projects translated their findings into policy recommendations, using an adapted logical framework approach. Second, the research team grouped these recommendations into strategies for obesity prevention, using the deductive analytical strategy of successive approximation. Third, through a nominal group session including participants, researchers, public health practitioners and local policy-makers, we discussed and prioritized the obesity prevention recommendations. Participants identified 12 policy recommendations related to their food choices and 18 related to their physical activity. The research team grouped these into 11 concrete recommendations for obesity prevention. The ‘top-three’ ranked recommendations were: (1) to adequate and increase the number of public open spaces; (2) to improve the access and cost of existing sports facilities and (3) to reduce the cost of gluten-free and diabetic products.


BMC Public Health | 2018

Photovoice and empowerment: evaluating the transformative potential of a participatory action research project

Kirsten Budig; Julia Díez; Paloma Conde; Marta Sastre; Mariano Hernán; Manuel Franco

BackgroundPhotovoice is a visual research methodology with the intention to foster social change. Photovoice has been used to investigate change in empowerment in vulnerable communities, However, the individual experience of participants involved in Photovoice projects is seldom scrutinized. Our aim was to explore and describe the individual experiences of the female individuals who participated in a previous Photovoice project. We analyzed a change in the women’s empowerment in terms of: 1) gain in knowledge and skills, 2) change in self-perception, and 3) access to and use of resources.MethodsThis qualitative study took place in the low-income District of Villaverde (Madrid, Spain), from January-June 2016. We conducted 10 semi-structured interviews with the female residents who had participated in the previous Photovoice project. We also collected field notes. We analyzed these data through a direct qualitative content analysis. The three outlined dimensions of empowerment provided guidance for the analysis of the results.ResultsWe found positive changes in the three dimensions of empowerment: 1) participants acquired new knowledge and developed critical awareness of their community; 2) the social recognition participants received transformed their self-perception; and 3) the project allowed them to expand their social networks and to build new links with different actors (research partners, local decision makers, media and the wider public).ConclusionsPhotovoice projects entail the opportunity for empowering participants. Future research using Photovoice should assess the influence it has on participants’ empowerment changes and how to sustain these individual and social changes.


International Journal of Environmental Research and Public Health | 2018

Changing Neighborhoods and Residents’ Health Perceptions: The Heart Healthy Hoods Qualitative Study

Paloma Conde; Marta Gutiérrez; María Sandín; Julia Díez; Luisa Borrell; Jesús Rivera-Navarro; Manuel Franco

Cities, and therefore neighborhoods, are under constant change. Neighborhood changes may affect residents’ health in multiple ways. The Heart Healthy Hoods (HHH) project studies the association between neighborhood and residents’ health. Focusing on a middle–low-socioeconomic neighborhood in Madrid (Spain), our aim was to describe qualitatively its residents’ perceptions on the urban changes and their impacts on health. We designed a qualitative study using 16 semi-structured interviews including adult residents and professionals living or working in the area. Firstly, we described the perceived main social and neighborhood changes. Secondly, we studied how these neighborhood changes connected to residents’ health perceptions. Perceived major social changes were new demographic composition, new socio–cultural values and economic changes. Residents’ negative health perceptions were the reduction of social relationships, increase of stress and labor precariousness. Positive health perceptions were the creation of supportive links, assimilation of self-care activities and the change in traditional roles. Neighborhood changes yielded both negative and positive effects on residents’ health. These effects would be the result of the interrelation of different elements such as the existence or absence of social ties, family responsibilities, time availability, economic resources and access and awareness to health-promoting programs. These qualitative research results provide important insight into crafting urban health policies that may ultimately improve health outcomes in communities undergoing change.


Health & Place | 2018

Neighborhood social and economic change and retail food environment change in Madrid (Spain): The heart healthy hoods study

Usama Bilal; Jessica C. Jones-Smith; Julia Díez; Robert S. Lawrence; David D. Celentano; Manuel Franco

Abstract This study explores the association between neighborhood social and economic change from 2009 to 2013 and changes in the retail food environment from 2013 to 2017 in Madrid (Spain). We classified neighborhoods into four types: decreasing SES, new housing/gentrifying, increasing SES, and aging (population and housing). Food store data was obtained from a retail spaces census and classified as supermarket, specialized small store, or fruit and vegetable store. Compared to aging areas, new housing/gentrifying and areas with increasing SES had a higher baseline presence and proportion of supermarkets and a lower proportion of specialized stores and fruit and vegetable stores. Areas with decreasing SES had an initially higher presence and proportion of fruit and vegetable stores but showed a declining trend in both presence and proportion of fruit and vegetable stores. HighlightsWe explored the association between neighborhood change and food environment change.We measured neighborhood social and economic change in Madrid (Spain).We classified and geocoded all food stores in the city.Increasing SES and gentrifying areas are associated with an increased proportion of supermarkets.Decreasing SES and aging areas are associated with an increased proportion of small food stores.


BMC Medical Research Methodology | 2016

Population cardiovascular health and urban environments: the Heart Healthy Hoods exploratory study in Madrid, Spain

Usama Bilal; Julia Díez; Silvia Alfayate; Pedro Gullón; Isabel del Cura; Francisco Escobar; María Sandín; Manuel Franco


Health & Place | 2017

Understanding the local food environment: A participatory photovoice project in a low-income area in Madrid, Spain

Julia Díez; Paloma Conde; María Sandín; María Urtasun; Remedios López; José Luis Carrero; Joel Gittelsohn; Manuel Franco


Preventive Medicine | 2016

Understanding differences in the local food environment across countries: A case study in Madrid (Spain) and Baltimore (USA).

Julia Díez; Usama Bilal; Alba Cebrecos; Amanda Buczynski; Robert S. Lawrence; Thomas A. Glass; Francisco Escobar; Joel Gittelsohn; Manuel Franco


Public Health Nutrition | 2017

The mismatch between observational measures and residents' perspectives on the retail food environment: A mixed-methods approach in the Heart Healthy Hoods study

Julia Díez; Roberto Valiente; Carmen Ramos; Reyes García; Joel Gittelsohn; Manuel Franco


International Journal of Health Geographics | 2016

Characterizing physical activity and food urban environments: a GIS-based multicomponent proposal

Alba Cebrecos; Julia Díez; Pedro Gullón; Usama Bilal; Manuel Franco; Francisco Escobar

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