Some attributes of neighborhood environments are associated with physical activity among older adults. This study examined whether the associations were moderated by driving status. Older adults from neighborhoods differing in walkability and income completed written surveys and wore accelerometers (N=880, mean age=75 years, 56% women). Neighborhood environments were measured by geographic information systems and validated questionnaires. Driving status was defined on the basis of a driver's license, car ownership, and feeling comfortable to drive.Corresponding Author: Ding Ding, Sydney School of Public Health, University of Sydney, Sydney, Australia. melody.ding@sydney.edu.au.
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Author ManuscriptOutcome variables included accelerometer-based physical activity and self-reported transport and leisure walking. Multilevel generalized linear regression was used. There was no significant Neighborhood Attribute × Driving Status interaction with objective physical activity or reported transport walking. For leisure walking, almost all environmental attributes were positive and significant among driving older adults but not among nondriving older adults (five significant interactions at p<0.05). The findings suggest that driving status is likely to moderate the association between neighborhood environments and older adults' leisure walking.Keywords built environment; walking; moderator; moderation Despite numerous health benefits of regular physical activity (Bouchard, Blair, & Haskell, 2012; Nelson, et al., 2007), older adults remain the least active age group (Centers for Disease Control and Prevention, 2010). In a study based on national data of objectively measured physical activity, only 2.4% of US adults age 60 or older met the recommended physical activity levels (Troiano et al., 2008).Increasing evidence from multiple disciplines has underscored the importance of built environments to physical activity (Heath, et al., 2006;Sallis, Floyd, Rodriguez, & Saelens, 2012). As a result of functional declines and fears of navigating outdoor environments (Rantakokko et al., 2009), attributes of community design may be especially important to older adults (Shigematsu et al., 2009), particularly those with mobility impairments (King et al., 2011). However, only a small number of studies have examined neighborhood environments in relation to physical activity among older adults, and findings were mixed (Cunningham & Michael, 2004;Van Cauwenberg et al., 2011). Overall, neighborhood environments had more consistent associations with self-reported physical activity than with objectively measured physical activity among older adults (Van Cauwenberg et al., 2011). There is evidence supporting the association of physical activity with access and proximity to recreation facilities (Berke et al., 2006;Li, Fisher, Brownson, & Bosworth, 2005;Shigematsu et al., 2009) and with mixed land use patterns (Frank, Kerr, Rosenberg, & King, 2010;Li, Fisher, Bauman et ...