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Behavioral mediators of the association between neighborhood environment and weight status in Nigerian adults
Oyeyemi, Adewale L. Deforche, Benedicte Sallis, James F. De Bourdeaudhuij, Ilse Van Dyck, Delfien
Oyeyemi, Adewale L.
Deforche, Benedicte
Sallis, James F.
De Bourdeaudhuij, Ilse
Van Dyck, Delfien
Abstract
Purpose: Neighborhood built environments are related to obesity and physical activity (PA), but inconsistently to sedentary behaviors. This study investigated the mediating effects of PA and sedentary time on the associations of neighborhood environmental factors and body mass index (BMI) among Nigerian adults. Design: The study design was cross-sectional. Setting: The study setting was metropolitan Maiduguri, Nigeria. Subjects: Nigerian adults (n = 1411) were randomly selected from diverse neighborhoods and had complete data (43.1% women, 33.8% overweight or obese). Measures: PA, sedentary time, and 16 perceived neighborhood environmental factors were measured using Nigerian adaptations of validated international questionnaires. Outcomes were measured BMI and interviewer-led self-reports of moderate to vigorous PA, walking, total PA, and sitting time. Analysis: The product-of-coefficient test using generalized linear models was used to assess the mediating effects of outcomes on the associations between environmental factors and BMI. Results: Walking and total PA significantly mediated the association between BMI and perception of higher residential density (αβ = –.025 and –.037, respectively), absence of garbage (αβ = –.046 and –.076, respectively), and more safety from crime at night (αβ = –.044 and –.083, respectively). In addition, walking, moderate to vigorous PA, and total PA significantly mediated the association between BMI and perception of better aesthetics (αβ = –.035, –.022, and –.071, respectively). Sedentary time was not a significant mediator of any associations between environmental factors and BMI. Conclusion: The association of several neighborhood environmental variables with BMI was partially mediated by PA in Nigerian adults. Including questions on specific types of sedentary behaviors in future prospective studies may improve understanding of the relative influence of sedentary behavior and physical activity on obesity control and prevention among sub-Saharan African adults.
Keywords
obesity, built environment, physical activity, sedentary time, Africa, prevention research
Date
2013
Type
Journal article
Journal
American Journal of Health Promotion
Book
Volume
28
Issue
1
Page Range
23-31
Article Number
ACU Department
Mary MacKillop Institute for Health Research
Faculty of Health Sciences
Faculty of Health Sciences
Collections
Relation URI
Source URL
Event URL
Open Access Status
License
File Access
Controlled