NCHS Dataline

National Center for Health Statistics. Early release of selected estimates based on data from the January-June 2012 National Health Interview Survey. Hyattsville (MD): NCHS; 2012. Also available from: URL: http://www.cdc.gov/nchs/nhis/released201212.htm [cited 2013 May 19].

Department of Health and Human Services (US). Physical activity guidelines for Americans. Washington: HHS; 2008.

National Center for Health Statistics (US). Healthy people 2010 final review. Hyattsville (MD): NCHS; 2012. Also available from: URL: http://www.cdc.gov/nchs/healthy_people/hp2010/hp2010_final_review.htm [cited 2013 May 19].