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Author  |
Abay, K.A.; Amare, M. |
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Title |
Night light intensity and women's body weight: Evidence from Nigeria |
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Journal Article |
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Year |
2018 |
Publication |
Economics and Human Biology |
Abbreviated Journal |
Econ Hum Biol |
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Volume |
31 |
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Pages |
238-248 |
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Keywords |
Remote Sensing; Human Health; Adolescent; Adult; Body Mass Index; *Body Weight; Cross-Sectional Studies; Female; Health Surveys; Humans; Lighting/*statistics & numerical data; Middle Aged; Nigeria/epidemiology; Obesity/epidemiology; Overweight/*epidemiology; Prevalence; *Urbanization; Young Adult; *Bmi; *Nigeria; *Night light; *Obesity; *Overweight; *Urbanization |
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Abstract |
The prevalence of overweight and obesity are increasing in many African countries and hence becoming regional public health challenges. We employ satellite-based night light intensity data as a proxy for urbanization to investigate the relationship between urbanization and women's body weight. We use two rounds of the Demographic and Health Survey data from Nigeria. We employ both nonparametric and parametric estimation approaches that exploit both the cross-sectional and longitudinal variations in night light intensities. Our empirical analysis reveals nonlinear relationships between night light intensity and women's body weight measures. Doubling the sample's average level of night light intensity is associated with up to a ten percentage point increase in the probability of overweight. However, despite the generally positive relationship between night light intensity and women's body weight, the strength of the relationship varies across the assorted stages of night light intensity. Early stages of night light intensity are not significantly associated with women's body weight, while higher stages of nightlight intensities are associated with higher rates of overweight and obesity. Given that night lights are strong predictors of urbanization and related economic activities, our results hint at nonlinear relationships between various stages of urbanization and women's body weight. |
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Address |
International Food Policy Research Institute (IFPRI), USA. Electronic address: M.Amare@cgiar.org |
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English |
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ISSN |
1570-677X |
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Notes |
PMID:30312904 |
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Call Number |
GFZ @ kyba @ |
Serial |
2714 |
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Author |
Hale, J.D.; Davies, G.; Fairbrass, A.J.; Matthews, T.J.; Rogers, C.D.F.; Sadler, J.P. |
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Title |
Mapping lightscapes: spatial patterning of artificial lighting in an urban landscape |
Type |
Journal Article |
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Year |
2013 |
Publication |
PloS one |
Abbreviated Journal |
PLoS One |
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Volume |
8 |
Issue |
5 |
Pages |
e61460 |
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Keywords |
*Cities; England; Environmental Pollution; Geographic Mapping; Humans; Light; *Lighting; Photography; Urban Population; *Urbanization |
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Abstract |
Artificial lighting is strongly associated with urbanisation and is increasing in its extent, brightness and spectral range. Changes in urban lighting have both positive and negative effects on city performance, yet little is known about how its character and magnitude vary across the urban landscape. A major barrier to related research, planning and governance has been the lack of lighting data at the city extent, particularly at a fine spatial resolution. Our aims were therefore to capture such data using aerial night photography and to undertake a case study of urban lighting. We present the finest scale multi-spectral lighting dataset available for an entire city and explore how lighting metrics vary with built density and land-use. We found positive relationships between artificial lighting indicators and built density at coarse spatial scales, whilst at a local level lighting varied with land-use. Manufacturing and housing are the primary land-use zones responsible for the city's brightly lit areas, yet manufacturing sites are relatively rare within the city. Our data suggests that efforts to address light pollution should broaden their focus from residential street lighting to include security lighting within manufacturing areas. |
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Address |
School of Geography, Earth and Environmental Sciences, The University of Birmingham, Birmingham, West Midlands, United Kingdom. j.hale@bham.ac.uk |
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English |
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1932-6203 |
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Notes |
PMID:23671566; PMCID:PMC3646000 |
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Call Number |
IDA @ john @ |
Serial |
209 |
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