Int J Health Geogr - Comparing the accuracy of two secondary food environment data sources in the UK across socio-economic and urban/rural divides.


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CKGROUND: Interest in the role of food environments in shaping food consumption behaviours has grown in recent years. However, commonly used secondary food environment data sources have not yet been fully evaluated for completeness and systematic biases. This paper assessed the accuracy of UK Points of Interest (POI) data, compared to local council food outlet data for the county of Cambridgeshire.METHODS: Percentage agreement, positive predictive values (PPVs) and sensitivities were calculated for all food outlets across the study area, by outlet type, and across urban/rural/SES divisions.RESULTS: Percentage agreement by outlet type (29.7-63.5%) differed significantly to overall percentage agreement (49%), differed significantly in rural areas (43%) compared to urban (52.8%), and by SES quintiles. POI data had an overall PPV of 74.9%, differing significantly for Convenience Stores (57.9%), Specialist Stores (68.3%), and Restaurants (82.6%). POI showed an overall 'moderate' sensitivity, although this varied significantly by outlet type. Whilst sensitivities by urban/rural/SES divides varied significantly from urban and least deprived reference categories, values remained 'moderate'.CONCLUSIONS: Results suggest POI is a viable alternative to council data, particularly in terms of PPVs, which remain robust across urban/rural and SES divides. Most variation in completeness was by outlet type; lowest levels were for Convenience Stores, which are commonly cited as 'obesogenic'.

Resumo Limpo

ckground interest role food environ shape food consumpt behaviour grown recent year howev common use secondari food environ data sourc yet fulli evalu complet systemat bias paper assess accuraci uk point interest poi data compar local council food outlet data counti cambridgeshiremethod percentag agreement posit predict valu ppvs sensit calcul food outlet across studi area outlet type across urbanrurals divisionsresult percentag agreement outlet type differ signific overal percentag agreement differ signific rural area compar urban ses quintil poi data overal ppv differ signific conveni store specialist store restaur poi show overal moder sensit although vari signific outlet type whilst sensit urbanrurals divid vari signific urban least depriv refer categori valu remain moderateconclus result suggest poi viabl altern council data particular term ppvs remain robust across urbanrur ses divid variat complet outlet type lowest level conveni store common cite obesogen

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