Residential density and adolescent overweight in a rapidly urbanising region of mainland China

Xu, F, Li, JQ, Liang, YQ, Wang, ZY, Hong, X, Ware, RS, Leslie, E, Sugiyama, T and Owen, N (2010) Residential density and adolescent overweight in a rapidly urbanising region of mainland China. Journal of Epidemiology and Community Health, 64 11: 1017-1021. doi:10.1136/jech.2009.094169


Author Xu, F
Li, JQ
Liang, YQ
Wang, ZY
Hong, X
Ware, RS
Leslie, E
Sugiyama, T
Owen, N
Title Residential density and adolescent overweight in a rapidly urbanising region of mainland China
Journal name Journal of Epidemiology and Community Health   Check publisher's open access policy
ISSN 0143-005X
1470-2738
Publication date 2010-11
Year available 2009
Sub-type Article (original research)
DOI 10.1136/jech.2009.094169
Volume 64
Issue 11
Start page 1017
End page 1021
Total pages 5
Place of publication London, United Kingdom
Publisher B M J Group
Collection year 2011
Language eng
Formatted abstract
Objective
This study investigated the association of residential density with overweight among adolescents in an urban area of China.

Methods
Using multistage proportional sampling methods, a population-based cross-sectional study was conducted in Nanjing between September and November 2004 (n=2375; mean age 13.9 +/- 61.0 years old; 46.2% boys; survey response rate=89.3%). Body mass index was calculated from self-reported body weight and height. Overweight, the main outcome variable, was defined as a BMI >= 85 percentile value for age-and gender-specific reference data according to the recommendation for Chinese adolescents. The primary explanatory variable was the residential density of the urban districts. Mixed-effects logistic regression models were used for the analysis.

Results
Students in the higher and middle tertiles of residential density had a 2.17-fold (95% CI 1.41 to 3.33) and 1.89-fold (95% CI 1.22 to 2.92) higher likelihood of being overweight, respectively, compared with those in the lower tertile. The associations were slightly attenuated but still significant after adjusting for time spent in recreational physical activity and sedentary behaviour (viewing TV and sitting for academic study).

Conclusions
Residential density was positively associated with overweight among urban Chinese adolescents. Our findings warrant further research examining attributes of urban environments associated with adolescents' obesity in China and potential mechanisms between them.
Copyright © 2011 by the BMJ Publishing Group Ltd. All rights reserved.


Keyword Body mass Index
Physical activity
Built environment
Neighborhood walkability
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Published Online First 26 October 2009.

Document type: Journal Article
Sub-type: Article (original research)
Collections: Cancer Prevention Research Centre Publications
Official 2011 Collection
School of Public Health Publications
 
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Created: Sun, 07 Nov 2010, 00:07:49 EST