Behavioral Mediators of the Association between Neighborhood Environment and Weight Status in Nigerian Adults
Bibliographic record
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.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".