title: Nonoccupational physical activity by degree of urbanization and U.S. geographic region.
abstract: OBJECTIVE
  To estimate levels of nonoccupational leisure-time physical activity (LTPA) by degree of urbanization and geographic region of the United States.
  
  
  METHODS
  Participants were respondents to the Behavioral Risk Factor Surveillance System (BRFSS) in 2001 (N = 137,359). Moderate- and vigorous-intensity LTPA was categorized as meeting recommended levels, insufficient, or inactive. The U.S. Department of Agriculture rural-urban continuum codes were used to describe degrees of urbanization (metro, large urban, small urban, and rural). Geographic regions were defined by the U.S. Bureau of the Census (Northeast, Midwest, South, and West). Prevalence estimates were calculated using sample weights to account for the design of the BRFSS. Multivariate logistic regression analyses examined regional differences in the odds of physical inactivity (physically inactive vs insufficient or meets) by degree of urbanization after adjustment for sex, age, race, BMI, education, and occupational physical activity.
  
  
  RESULTS
  Large urban areas (49.0%) and the western United States (49.0%) had the highest prevalence of recommended levels of LTPA. Rural areas (24.1%) and the southern United States (17.4%) had the highest prevalence of inactivity. Adults living in the four urbanization categories of the midwestern (metro (OR = 1.47, 95% CI = 1.31, 1.65), large urban (OR = 1.83, 95% CI = 1.51, 2.23), small urban (OR = 1.99, 95% CI = 1.65, 2.40), and rural (OR = 2.59, 95% CI = 1.35, 4.97)); and southern (metro (OR = 1.70, 95% CI = 1.53, 1.88), large urban (OR = 2.04, 95% CI = 1.72, 2.41), small urban (OR = 2.32, 95% CI = 2.02, 2.67), and rural (OR = 5.49, 95% CI = 2.82, 10.68)) U.S. regions were more likely to be inactive than adults living in similar areas of the western United States. Adults in northeast metro and large urban areas (OR = 1.62, 95% CI = 1.45, 1.81; and OR = 1.37, 95% CI = 1.08, 1.74, respectively) were more likely to be inactive than those residing in western metro and large urban areas.
  
  
  CONCLUSIONS
  The prevalence of physical inactivity varies by degree of urbanization and geographic region of the United States.
authors.affiliation: Division of Epidemiology & Biostatistics, Graduate School of Public Health, San Diego State University, San Diego, CA, USA.
authors.forename: Jared P
authors.initials: JP
authors.lastname: Reis
authors.forename: Heather R
authors.initials: HR
authors.lastname: Bowles
authors.forename: Barbara E
authors.initials: BE
authors.lastname: Ainsworth
authors.forename: Katrina D
authors.initials: KD
authors.lastname: Dubose
authors.forename: Sharon
authors.initials: S
authors.lastname: Smith
authors.forename: James N
authors.initials: JN
authors.lastname: Laditka
mesh_terms: D000203:Activities of Daily Living; D000328:Adult; D000368:Aged; D015992:Body Mass Index; D002947:Cities; D005260:Female; D040362:Geographic Information Systems; D006801:Humans; D008297:Male; D008875:Middle Aged; D010809:Physical Fitness; D011159:Population Surveillance; D015995:Prevalence; D014481:United States; D014505:Urban Population