Kaplan-Meier curve by tertile of total activity counts (top panel) and tertile of light activity counts (bottom panel), National Health and Nutrition Examination Survey, 2003-2006. Subjects aged 50-79 at baseline; mortality follow-up through 2011 (n=3,029). T1=Tertile 1 (fewest activity counts), T2=Tertile 2, T3=Tertile 3 (most activity). Embedded tables show number of subjects at risk at specific points: 1, 3, 5, 7, and 9 years of follow-up, and number of deaths occurring in the intervals between these points. Values in embedded tables are unweighted.