Validation of presence of supermarkets and fast-food outlets in Copenhagen: case study comparison of multiple sources of secondary data

Public Health Nutrition

Pernille Due¹  Chalida M Svastisalee¹  Bjørn E Holstein¹ 

关键词: Food environment;    Geographic information system;    Validation;    Food outlets;    Europe;    Secondary sources;   

DOI  :  10.1017/S1368980012000845

学科分类：卫生学

来源: Cambridge University Press

【 摘 要 】

AbstractObjectiveWe examined the quality of food outlet addresses provided by secondary sources and determined whether they could be physically located in the field.DesignAddresses of food outlets in fourteen school districts in the northern part of Copenhagen were obtained from multiple business locators. We geocoded 202 addresses using a geographic information system and cross-referenced the sources against each other using a validation grid. Physical presence was determined via street survey. We applied gamma statistics and calculated positive predictive value, sensitivity and percentage agreement to assess the overall correspondence between our test of physical presence and each source of secondary information.SettingThe study took place within city boundaries of Copenhagen, Denmark.SubjectsFood outlets within fourteen school districts within Copenhagen.ResultsPositive predictive value between field results and secondary sources indicated good to excellent correspondence (range: 0·81–0·98), comparable with other studies. Gamma coefficients indicated low to high positive correspondence (range: 0·23–0·98).ConclusionsDespite moderately high correspondence between secondary sources of address information and field observation, the findings illustrate that the use of combined sources is recommended.

【 授权许可】

Unknown