Survival analyses of underlying cause of death vs. categories of physical activity adjusted for medication use and BMI_{starting walking}.

*<p>Hazard ratios (95% confidence intervals) from Cox proportional hazard analyses. † Semihazard ratios (95% confidence intervals) from competing risk regression analyses. See <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0078777#pone-0078777-t002" target="_blank">table 2</a> for adjustments. Hazard and semihazard ratios relative to <1.07 MET-hours/d.