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Research examining built environment (BE) characteristics and walking/cycling behaviors has been conducted primarily in high-income countries and conclusions cannot be applied directly to low- and middle-income countries. We evaluated perceived BE characteristics and walking/cycling behaviors across 355 urban communities in 21 low-, middle-, and high- income countries using individual data for 39,908 adults in the Prospective Urban and Rural Epidemiology study. The 1-week long-form International Physical Activity Questionnaire was used to measure walking/cycling behaviors. Perceived BE characteristics were measured using the Neighborhood Environment Walkability Scale. Mixed effects logistic regression models examined associations between BE measures and walking for transport (≥150 min/wk), walking for leisure (≥150 min/wk), and any cycling for transport, controlling for individual …