Re: Statistics
If you click through to the summary of the study you get this:
"During 621 695 person-years of follow-up (mean follow-up, 2.8 years), 5405 deaths were registered. All-cause mortality hazard ratios were 1.02 (95% CI, 0.95-1.09), 1.15 (1.06-1.25), and 1.40 (1.27-1.55) for 4 to less than 8, 8 to less than 11, and 11 or more h/d of sitting, respectively, compared with less than 4 h/d, adjusting for physical activity and other confounders. The population-attributable fraction for sitting was 6.9%."
There's nothing on the proportions of the population who fall into each of the groups so there's not enough information to give an accurate estimate of actual risk. But the total population had a mortality rate of about 0.87% per year. A 40% increase would be about 1.2%, but the 40% is (as far as I can tell) the ratio above the portion of the population who sit for less than 4 hours a day rather than the entire population so the actual figure will be less than this.
It's not enough to make me leap out of my chair and go for a jog.