Fig. 4: Relationship between park accessibility and daily steps across 53 US metropolitan areas.

a, Bar plot showing the difference between city-level park–step slope values (from random effects) and the overall park accessibility coefficient (from fixed effects), coloured by geographic region. A positive value indicates that a city’s residents engaged in more steps relative to their park accessibility compared with the average effect. b, Distribution of the difference between park–step slopes and average effect across 53 US metropolitan areas in 6 geographic regions. The colours of the points represent the difference compared with average effects. c, Scatterplot illustrating the association between city-level park–step slopes and average temperature (n = 53; Pearson correlation (two sided): r = 0.61; P = 0.0002).