Length of urban residence and obesity among within-country rural-to-urban Andean migrants.


Antiporta, DA; Smeeth, L; Gilman, RH; Miranda, JJ; (2015) Length of urban residence and obesity among within-country rural-to-urban Andean migrants. Public health nutrition, 19 (7). pp. 1270-8. ISSN 1368-9800 DOI: https://doi.org/10.1017/S1368980015002578

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Abstract

: To evaluate the association between length of residence in an urban area and obesity among Peruvian rural-to-urban migrants.<br/> : Cross-sectional database analysis of the migrant group from the PERU MIGRANT Study (2007). Exposure was length of urban residence, analysed as both a continuous (10-year units) and a categorical variable. Four skinfold site measurements (biceps, triceps, subscapular and suprailiac) were used to calculate body fat percentage and obesity (body fat percentage &gt;25% males, &gt;33% females). We used Poisson generalized linear models to estimate adjusted prevalence ratios and 95 % confidence intervals. Multicollinearity between age and length of urban residence was assessed using conditional numbers and correlation tests.<br/> : A peri-urban shantytown in the south of Lima, Peru.<br/> : Rural-to-urban migrants (n 526) living in Lima.<br/> : Multivariable analyses showed that for each 10-year unit increase in residence in an urban area, rural-to-urban migrants had, on average, a 12 % (95 % CI 6, 18 %) higher prevalence of obesity. This association was also present when length of urban residence was analysed in categories. Sensitivity analyses, conducted with non-migrant groups, showed no evidence of an association between 10-year age units and obesity in rural (P=0·159) or urban populations (P=0·078). High correlation and a large conditional number between age and length of urban residence were found, suggesting a strong collinearity between both variables.<br/> : Longer lengths of urban residence are related to increased obesity in rural-to-urban migrant populations; therefore, interventions to prevent obesity in urban areas may benefit from targeting migrant groups.<br/>

Item Type: Article
Faculty and Department: Faculty of Epidemiology and Population Health > Dept of Non-Communicable Disease Epidemiology
Research Centre: EHR Research Group
Centre for Global Non-Communicable Diseases (NCDs)
Related URLs:
PubMed ID: 26365215
Web of Science ID: 374241700014
URI: http://researchonline.lshtm.ac.uk/id/eprint/2305209

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